WO2024133376A1 - Catalyseur a base d'une zeolithe et d'une structure alpo et presentant un volume macroporeux eleve - Google Patents
Catalyseur a base d'une zeolithe et d'une structure alpo et presentant un volume macroporeux eleve Download PDFInfo
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- WO2024133376A1 WO2024133376A1 PCT/EP2023/086814 EP2023086814W WO2024133376A1 WO 2024133376 A1 WO2024133376 A1 WO 2024133376A1 EP 2023086814 W EP2023086814 W EP 2023086814W WO 2024133376 A1 WO2024133376 A1 WO 2024133376A1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J29/00—Catalysts comprising molecular sieves
- B01J29/04—Catalysts comprising molecular sieves having base-exchange properties, e.g. crystalline zeolites
- B01J29/06—Crystalline aluminosilicate zeolites; Isomorphous compounds thereof
- B01J29/40—Crystalline aluminosilicate zeolites; Isomorphous compounds thereof of the pentasil type, e.g. types ZSM-5, ZSM-8 or ZSM-11, as exemplified by patent documents US3702886, GB1334243 and US3709979, respectively
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J29/00—Catalysts comprising molecular sieves
- B01J29/04—Catalysts comprising molecular sieves having base-exchange properties, e.g. crystalline zeolites
- B01J29/06—Crystalline aluminosilicate zeolites; Isomorphous compounds thereof
- B01J29/061—Crystalline aluminosilicate zeolites; Isomorphous compounds thereof containing metallic elements added to the zeolite
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J29/00—Catalysts comprising molecular sieves
- B01J29/82—Phosphates
- B01J29/83—Aluminophosphates [APO compounds]
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J35/00—Catalysts, in general, characterised by their form or physical properties
- B01J35/30—Catalysts, in general, characterised by their form or physical properties characterised by their physical properties
- B01J35/34—Mechanical properties
- B01J35/37—Crush or impact strength
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J35/00—Catalysts, in general, characterised by their form or physical properties
- B01J35/60—Catalysts, in general, characterised by their form or physical properties characterised by their surface properties or porosity
- B01J35/63—Pore volume
- B01J35/633—Pore volume less than 0.5 ml/g
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J37/00—Processes, in general, for preparing catalysts; Processes, in general, for activation of catalysts
- B01J37/28—Phosphorising
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C1/00—Preparation of hydrocarbons from one or more compounds, none of them being a hydrocarbon
- C07C1/20—Preparation of hydrocarbons from one or more compounds, none of them being a hydrocarbon starting from organic compounds containing only oxygen atoms as heteroatoms
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C2529/00—Catalysts comprising molecular sieves
- C07C2529/04—Catalysts comprising molecular sieves having base-exchange properties, e.g. crystalline zeolites, pillared clays
- C07C2529/06—Crystalline aluminosilicate zeolites; Isomorphous compounds thereof
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C2529/00—Catalysts comprising molecular sieves
- C07C2529/04—Catalysts comprising molecular sieves having base-exchange properties, e.g. crystalline zeolites, pillared clays
- C07C2529/06—Crystalline aluminosilicate zeolites; Isomorphous compounds thereof
- C07C2529/40—Crystalline aluminosilicate zeolites; Isomorphous compounds thereof of the pentasil type, e.g. types ZSM-5, ZSM-8 or ZSM-11
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C2529/00—Catalysts comprising molecular sieves
- C07C2529/82—Phosphates
- C07C2529/83—Aluminophosphates (APO compounds)
Definitions
- the present invention relates to a catalyst comprising a zeolite having, at least in part, an ALPO structure, a binder and advantageously phosphorus, and having a high macroporous volume.
- the present invention also relates to a process for preparing such a catalyst.
- Such a catalyst is of great interest for industrial processes involving the presence of steam at high temperatures, such as the dehydration of alcohol to the corresponding olefin, such as the dehydration of ethanol to selectively produce ethylene.
- the invention also relates to the use of a catalyst according to the invention in a process for dehydrating an alcohol, such as the dehydration of ethanol to ethylene.
- patent FR2978145 describes, in particular, a process for producing ethylene from an ethanol feedstock, in the presence of a dehydration catalyst comprising a ZSM-5 zeolite treated with H3PO4, so that the P2O5 content is 3.5% by weight.
- Application WO 2013/017499 discloses a process for manufacturing a phosphorus-modified zeolite, which comprises a step of steam treatment at high temperatures (or steaming according to the English name) of a zeolite comprising at least one ring of ten members in the structure, followed by the introduction of phosphorus then the shaping of the zeolite modified with a binder and the deposition of a metal, and finally a new steam treatment (or steaming).
- Application WO 2013/017497 also discloses a process for manufacturing a phosphorus-modified zeolite.
- the method described in application WO 2013/017497 comprises the shaping with a binder of a zeolite comprising at least one ring of ten members in the structure, a step steam treatment at high temperatures (or steaming according to the Anglo-Saxon name) of the zeolite, before or after shaping, then the introduction of phosphorus and a metallic element, and finally a new steam treatment (or steaming).
- document WO 2013/017496 describes the use of a catalyst comprising a phosphorus-modified zeolite to convert at least one alcohol to olefins in a dehydration process to make an olefin having the same number of carbon atoms as the alcohol in which said catalyst is manufactured by a process comprising shaping with a binder a zeolite comprising at least one ring of ten members in the structure, a step of steam treatment at high temperatures of the zeolite, then the introduction of phosphorus and a metallic element, and finally a new steam treatment.
- Application WO 2013/017498 discloses a catalyst comprising a phosphorus-modified zeolite partially having an ALPO structure and comprising at least one ring of ten members in the structure, and a binder, said ALPO structure being determined by a signal at 35-45 ppm on the Aluminum 27 NMR spectrum.
- Document EP511013 provides a process for producing C2-C5 olefins from heavier olefinic and/or paraffinic compounds, by contacting with a particular ZSM-5 based catalyst at high temperatures, at high space velocity and at a low partial pressure of hydrocarbons.
- the catalysts are steam treated prior to use in hydrocarbon conversion and include 1-50 wt.% of a phosphorus-containing ZSM-5 zeolite (0.1-10 wt.% phosphorus based on the weight of catalyst) and having a surface Si/Al ratio of between 20 and 60. No metal such as Ca is introduced into the catalyst.
- the catalytic system comprises a molecular sieve dispersed in a phosphorus-modified alumina matrix containing labile phosphorus and/or aluminum anions, the latter allowing hydrothermal stabilization of the catalytic system.
- Patent WO 2009-098262 also discloses a catalyst for the dehydration of ethanol to ethylene.
- the catalyst comprises a steam-treated, phosphorus-modified ZSM-5 zeolite and a binder.
- AIPO aluminophosphate materials are well known in the state of the art. They exist in different Al/P atomic ratios and exhibit acidic properties at Al/P atomic ratios > 1, and even more pronounced as hydrogen phosphates with Al/P ⁇ 1. These are known to be used as acid catalysts in the dehydration of alcohols, particularly methanol (cf. US5753716).
- the source of aluminum used for the manufacture of AIPO aluminophosphates is generally produced by treating an external source of aluminum (alumina or aluminum salts) with a source of phosphorus, followed by a mixture with a zeolite, to prepare a catalyst. It can also happen that different types of aluminas or aluminum salts are mixed simultaneously with phosphorus and a zeolite.
- An objective of the present invention is to provide a new zeolite-based catalyst for the dehydration of ethanol to ethylene, making it possible to achieve high ethanol conversion rates and selectivity to ethylene by limiting the formation of products. undesirable (oligomeric and oxygenated), while presenting satisfactory hydrothermal resistance.
- the invention relates to a catalyst comprising a zeolite having at least one series of channels whose opening is at least equal to 10 oxygen atoms (10MR) and a binder, in which:
- the catalyst comprises phosphorus and comprises an AIPO structure, determined by a signal between 35 and 45 ppm on a spectrum obtained by 27 AI NMR analysis of the catalyst;
- V (4 -9oo) the pore volume (V (4 -9oo)) of the pores of the catalyst, the size of which is between 3.6 and 900 nm, is greater than or equal to 0.254 ml/g;
- the pore volume (V( 3 o-3io)) of the pores of size between 30 and 310 nm of the catalyst is less than or equal to 0.080 ml/g.
- such a catalyst having the composition and the particular textural characteristics (porosities) according to the invention makes it possible to obtain improved performance in the dehydration reaction of an alcohol to the corresponding olefin having the same number of carbon atoms, in particular in the dehydration of ethanol to ethylene, while presenting satisfactory mechanical strength.
- such a catalyst makes it possible to achieve a high selectivity for the targeted olefin, more particularly for ethylene, while ensuring a high conversion of alcohol, in particular ethanol, and an optimal yield of the targeted olefin, in a process for dehydrating said alcohol.
- such a catalyst has very suitable mechanical properties, in other words mechanical properties sufficient to allow handling and use on industrial type units.
- the catalyst according to the invention has an EGG value, grain to grain crushing, greater than or equal to 0.7 daN/mm, preferably greater than or equal to 0.8 daN/mm.
- the invention also relates, according to a second aspect, to the use of a catalyst according to the invention in a process for dehydrating an alcohol to an olefin having the same number of carbon atoms, in particular a process for dehydrating ethanol into ethylene.
- the invention also relates, according to a third aspect, to a process for producing ethylene from a feed comprising ethanol, said process comprising a step of dehydration of the ethanol carried out in the presence of the catalyst as described more high, at an inlet temperature of between 250 and 550°C, at an inlet pressure of between 0.1 and 1.7 MPa and at an hourly weight speed of between 0.1 and 30 h -1 .
- the mechanical properties can be determined by the grain-to-grain crushing test (EGG) described by the ASTM D 6175-3 method. This consists of measuring the breaking force of each particle of a representative sample comprising at least 50 particles. The result is weighted by the length of the extrusion.
- the EGG value is the average of the rupture forces measured and reduced to the unit of length of the extrusion (expressed in daN.mm-1) for all the particles in the sample.
- the expression “between ... and ...” means that the limit values of the interval are included in the range of values described. If this were not the case and the limit values were not included in the range described, such precision will be provided by the present invention.
- the expression “greater than" is understood as strictly greater, and symbolized by the sign “>”, and the expression “less than” as strictly inferior, and symbolized by the sign “ ⁇ ” .
- precision will be provided by the respective expressions “greater than or equal to...” (and corresponding to the “>” sign) and “less than or equal to” (corresponding to the “ ⁇ ” sign).
- the different parameter ranges can be used alone or in combination.
- a range of preferred values of zeolite structure can be combined with a range of more preferred values of pore volume.
- the invention relates to a catalyst comprising a zeolite having at least one series of channels whose opening is at least equal to 10 oxygen atoms (10MR), of preferably a zeolite of structure MFI, MTT, FER, MEL, TON, MWW, EllO and MFS, preferably of structure MFI and preferably a ZSM-5, and a binder, preferably a silicic binder or a clay, in which:
- the catalyst comprises phosphorus and comprises an AIPO structure, the content of the catalyst in AIPO structure preferably representing between 15 and 40%, preferably between 20 and 35% and preferably between 25 and 34%, species containing aluminum of the catalyst, the presence and quantification of the AIPO structure in the catalyst being determined by a signal measured between 35 and 45 ppm on a spectrum obtained by 27AI NMR analysis of the catalyst, and in particular the AIPO structure content corresponding to the ratio between the surface of the signal at 35-45 ppm relative to the total surface of the signal between -50 and 100 ppm on the spectrum obtained by 27AI NMR analysis of the catalyst;
- the pore volume (V (4 -9oo)) of the pores of the catalyst is greater than or equal to 0.25 ml/g, preferably greater than or equal to 0.250 ml /g, preferably greater than or equal to 0.26 ml/g, or even greater than or equal to 0.260 ml/g, and preferably less than or equal to 1.00 ml/g, preferably less than or equal to 0.80 ml/g , or even less than or equal to 0.60 ml/g;
- the pore volume (V (3 o-3io)) of the pores of size between 30 and 310 nm of the catalyst is less than or equal to 0.080 ml/g, preferably less than or equal to 0.070 ml/g;
- the zeolite content of the catalyst is between 5.0 and 95.0% by weight, preferably between 15.0 and 95.0% by weight, preferably between 50.0 and 90.0% by weight, preferably between 65.0 and 85.0% by weight, relative to the total weight of the catalyst;
- the phosphorus element content of the catalyst is between 0.5 and 20.0% by weight, preferably between 0.5 and 10.0% by weight, preferably between 1.0 and 5.0% by weight, so preferred between 2.0 and 4.0% by weight, relative to the total weight of the catalyst;
- the catalyst comprises a metal, preferably in the form of a metal oxide, said metal preferably being an alkaline earth metal or a rare earth, preferably chosen from magnesium, calcium, strontium, barium, lanthanum and cerium.
- the catalyst comprises a zeolite having at least one series of channels whose opening is at least equal to, preferably equal to, 10 oxygen atoms (10MR) and a binder.
- the zeolite content of the catalyst is between 5.0 and 95.0% by weight, preferably between 15.0 and 95.0% by weight, preferably between 50.0 and 90.0% by weight, preferably between 65.0 and 85.0% by weight, relative to the total weight of the catalyst.
- the binder content of the catalyst is, for its part, advantageously between 5.0 and 95.0% by weight, preferably between 5.0 and 85.0% by weight, preferably between 10.0 and 50.0% by weight, preferably between 15.0 and 35.0% by weight , relative to the total weight of the catalyst.
- the zeolite of the catalyst according to the invention which has at least one series of channels whose opening is at least equal, preferably equal, to 10 oxygen atoms (10MR) is a crystalline silicate having at least one series of channels whose opening is at least equal, preferably equal, to 10 oxygen atoms (10MR), and preferably chosen from zeolites of structure MFI, MTT, FER, MEL, TON, MWW, EUO and MFS.
- the zeolite is very preferably an MFI type zeolite and more preferably a ZSM-5 zeolite.
- the zeolite of the catalyst has a Si/Al molar ratio, of the silicon element relative to the aluminum element, of between 11 and 300, preferably between 11 and 40.
- the binder of the catalyst is an inorganic compound, typically inert in particular with respect to alcohols and in particular with ethanol.
- the binder is a silicic binder, such as silicas and in particular amorphous silicas; a clay such as kaolin, kaolinite, montmorillonite, attapulgite, saponite and bentonite; or their mixtures.
- the binder comprises, preferably consists of, a silicic binder and preferably an amorphous silica or a mixture of amorphous silicas.
- the catalyst comprises phosphorus.
- the phosphorus element content of the catalyst is between 0.5 and 20.0% by weight, preferably between 0.5 and 10.0% by weight, preferably between 1.0 and 5.0% by weight, so as to preferred between 2.0 and 4.0% by weight, relative to the total weight of the catalyst.
- the zeolite of the catalyst is modified with phosphorus.
- the catalyst comprises an AIPO structure.
- the structure of species containing aluminum can be shown and quantified by a method of analysis by nuclear magnetic resonance spectroscopy or NMR of aluminum 27 atoms (or 27 AI NMR), in the solid state, rotating at magic angle (magic angle spinning or MAS, according to the Anglo-Saxon name).
- the NMR-MAS 27 AI characterizations are carried out using a Bruker Avance 500 spectrometer, with a 4 mm zirconia MAS probe at a rotation speed of 15 kHz.
- a single excitation pulse is applied using a short excitation length of 0.6 psec.
- Each spectrum obtained is the result of 5000 scans separated by a delay of 0.5 sec.
- the chemical shifts on the 27 AI NMR spectrum are determined relative to a reference 0.1 M AlCh solution (chemical shift of 0 ppm).
- the solid samples are dehydrated before the NMR analysis.
- MAS 27 AI for example, the samples are left for 24 hours in a desiccator in the presence of a saturated solution of NH4NO3 then transferred to the NMR spectrometer without contact with air or humidity.
- the presence of an AIPO structure in the catalyst according to the invention is determined by the 27 AI NMR method, with the presence of a signal between 35 and 45 ppm on a spectrum obtained by 27 AI NMR analysis of the catalyst.
- the proportion of the AIPO structure in the catalyst according to the invention is determined by carrying out a ratio of the surface of the signal (or peak) between 35 and 45 ppm on the spectrum obtained by 27 AI NMR analysis of the catalyst relative to the total surface. measured between -50 and 100 ppm of the 27 AI NMR spectrum of the catalyst.
- the AIPO structure content of the catalyst represents between 15 and 40%, preferably between 20 and 35% and preferably between 25 and 34%, of the aluminum-containing species of the catalyst.
- the zeolite of the catalyst is modified with phosphorus and has, for part of its structure, an AIPO structure.
- the binder of the catalyst does not comprise any aluminum-containing species, preferably the binder is a silicic binder, and the AIPO structure content of the catalyst corresponds to the AIPO structure content of the zeolite (the zeolite being in fact the only source of element Al in the entire catalyst).
- the binder of the catalyst does not comprise any species containing aluminum, preferably is a silicic binder
- the zeolite has for part of its structure an AIPO structure, and the AIPO structure content of the zeolite represents between 15 and 40%, preferably between 20 and 35% and preferably between 25 and 34%, of the aluminum-containing species of the zeolite.
- the pore volumes of the catalyst according to the invention are measured by mercury volumetric analysis, detailed below. More precisely, the pore volumes of the catalyst are measured by intrusion with a mercury porosimeter according to the ASTM D4284-83 standard at a maximum pressure of 4000 bars, using a surface tension of 484 dyne/cm and a contact angle of 141°. The wetting angle was taken equal to 1 10° following the recommendations of the work “Engineering techniques, analysis and characterization treatise”, 1050, by J. Charpin and B. Rasneur.
- the value of the mercury volume in ml/g given in the following text corresponds to the value of the total mercury volume in ml/g measured on the sample minus the value of the mercury volume in ml/g measured on the same sample for a pressure corresponding to 30 psi (approximately 2 bars).
- the pore volume (V (4 -9oo)) of the pores of the catalyst is greater than or equal to 0 .25 ml/g, preferably greater than or equal to 0.250 ml/g, preferably greater than or equal to 0.26 ml/g, or even greater than or equal to 0.260 ml/g.
- the pore volume (V ( 4-9oo,o)) of the pores of the catalyst is less than or equal to 1.00 ml/g, preferably less than or equal to 0.80 ml/g, or even less than or equal to 0.60 ml/g, so as to contribute to satisfactory mechanical strength of the catalyst, which can then be easily handled and do not form fines in the reactor.
- the pore volume (V (3 o-3io)) of the pores of the catalyst is less than or equal to 0.080 ml/g, preferably less than or equal to 0.070 ml/g, and generally greater than or equal to 0.01 ml/g, preferably greater than or equal to 0.02 ml/g.
- the pore volume of pores with a size between 3 and 100 nm is less than 0.25 ml/g.
- the catalyst comprises mesopores, that is to say pores of size between approximately 4 and 50 nm, advantageously having an average mesoporous diameter less than or equal to 14 nm, preferably less than or equal to 12 nm , and preferably greater than or equal to 4 nm.
- the mesoporous volume of the catalyst is preferably less than or equal to 0.080, preferably less than or equal to 0.07, and generally greater than or equal to 0.01 ml/g, typically greater than or equal to 0.030 ml/g.
- the catalyst has microporosity, that is to say pores of size less than 2 nm.
- the catalyst has a microporous volume of between 0.04 and 1.5 ml/g, preferably between 0.06 and 1.3 ml/g, in particular between 0.06 and 1.0 ml/g.
- the microporous volume of the catalyst is measured by analysis of the nitrogen adsorption isotherm.
- the microporous volume of the catalyst corresponds to the volume occupied by pores with a diameter of less than 2 nm.
- the analysis of the nitrogen adsorption isotherm corresponds to the physical adsorption of nitrogen molecules in the porosity of the catalyst via a progressive increase in pressure at constant temperature and provides information on the textural characteristics (pore diameter, type of porosity, specific surface area) of the catalyst.
- the t method described in the periodical Journal of catalysis, (Studies on pore systems in catalysts V. The t method, J. Catal., 1965, 4(3), p. 319) is used.
- microporous volume is calculated with the following equation:
- V ⁇ i(mllg) D*Y
- D 15.468 x 10-4, coefficient to ensure the conversion of the gas volume to liquid volume.
- the chosen range of t corresponds to a plateau on the nitrogen adsorbed volume curve as a function of thickness t and is between 0.4 and 0.8 nm.
- the catalyst comprises a metal M, preferably in the form of metal oxide.
- said metal M is chosen from alkaline earth metals and rare earths, preferably from magnesium, calcium, strontium, barium, lanthanum and cerium.
- said metal M is an alkaline earth metal, preferably calcium.
- the content of the catalyst in said metal expressed in weight of the metal element M relative to the total weight of the catalyst, is between 0.1 and 10.0% by weight, preferably between 0.5 and 3.0% by weight.
- the catalyst comprises a low alkali metal (in particular sodium) content, in particular less than or equal to 1000 ppm by weight, preferably less than or equal to 600 ppm.
- a low alkali metal (in particular sodium) content in particular less than or equal to 1000 ppm by weight, preferably less than or equal to 600 ppm.
- a catalyst having such a composition and such textural characteristics makes it possible to achieve excellent performance in the dehydration reaction of an alcohol into corresponding olefins having the same number of carbon atoms, in particular in the dehydration of ethanol made of ethylene, while having satisfactory mechanical strength, thus allowing its handling and therefore its use in industrial type units.
- the present invention also relates to the use of the catalyst according to the invention in the invention in a process for dehydrating an alcohol to an olefin having the same number of carbon atoms, in particular of ethanol or ethylene, advantageously operated at a temperature between 250 and 550°C, preferably between 300 and 500°C, and at a pressure between 0.1 and 1, 7 MPa absolute, preferably between 0.2 and 1.3 MPa, and at an hourly weight speed of between 0.1 and 30 h -1 and preferably between 0.5 and 25 h -1 .
- the hourly weight velocity is defined as the ratio of the mass flow of pure alcohol, in particular ethanol, to the mass of catalyst.
- the present invention also relates to a process for producing olefin from a feed comprising an alcohol, preferably for producing ethylene from a feed comprising ethanol, said process comprising a dehydration step.
- alcohol preferably ethanol, carried out in the presence of the catalyst according to the invention and at an inlet temperature (that is to say temperature of the feed at entry into said dehydration step) between 250 and 550°C, preferably between 300°C and 500°C, at an inlet pressure (that is to say pressure of the charge at entry into said dehydration step) between 0 .1 and 1.7 MPa, preferably between 0.1 and 1.3 MPa, and at an hourly weight speed of between 0.1 and 30 h -1 and preferably between 0.5 and 25 h -1 .
- the hourly weight speed is defined as being the ratio of the mass flow of alcohol, in particular ethanol, included in the charge to the mass of catalyst.
- a reaction effluent is advantageously recovered at the exit of the dehydration stage. Said reaction effluent comprises water and the targeted olefin advantageously generated by the conversion of the alcohol, preferably ethanol, included in the feed. Said reaction effluent may also include other compounds, co-products or possibly already present in the feed.
- the input charge to the process comprising at least 20% by weight, preferably at least 50% by weight, preferably at least 60% by weight and preferably at least 85% by weight of alcohol, preferably ethanol.
- the process for producing olefin from a feed comprising an alcohol comprises a step of vaporizing the feed. , in part or in full, upstream of the dehydration step. Said vaporization step can be carried out by heat exchange, in particular with the reaction effluent resulting from the dehydration step.
- the production process comprises at least one step of purifying the reaction effluent, downstream of the dehydration step.
- the production process comprises a step of fractionating the reaction effluent, in at least one effluent comprising the targeted olefin, for example ethylene, and one effluent comprising water.
- the pore volumes of the catalysts were measured using the mercury porosimeter intrusion method, described earlier in this text.
- the presence and quantification of AIPO structure in the catalysts were determined by 27 AI NMR analysis, as explained above.
- the AIPO structure contents are expressed as a percentage of the aluminum-containing species and calculated by the ratio of the areas of the signal between 35 and 45 ppm relative to the signal between -50 and 100 ppm of the spectrum obtained.
- Two catalysts were analyzed. These two catalysts include a ZSM-5 zeolite (CBV2320 from Zeolyst) and amorphous silica (a mixture of colloidal silica and a silica sol) as a binder. They also both include phosphorus and calcium.
- ZSM-5 zeolite CBV2320 from Zeolyst
- amorphous silica a mixture of colloidal silica and a silica sol
- phosphorus and calcium are presented in Table 1 below.
- Catalyst A has a pore volume V (4 -9oo) of pores with a size between 3.6 and 900 nm, equal to 0.236 ml/g, that is to say less than 0.25 ml/g, and a pore volume V (3 o-3io) of pores of size between 30 and 310 nm, equal to 0.0852 ml/g, that is to say less than or equal to 0.080 ml/g.
- Catalyst A is therefore non-compliant.
- Catalysts A and B were tested in catalytic ethanol dehydration tests to produce ethylene.
- Example 2 Catalytic test of a charge of 95% by weight of ethanol
- a feed comprising 95% by weight of ethanol and 5% by weight of water was tested on a catalytic test unit comprising a fixed bed operating in “down flow” mode, that is to say in downward flow.
- the catalyst is loaded into a 316L stainless steel reactor with an internal diameter of 13 mm.
- the catalyst is then activated at 450°C under 6 l/h of air for a one-hour level after a temperature rise of 10°C/min.
- the temperature is then lowered to the test temperature under 6l/h of nitrogen in order to eliminate the air present in the system before injection of the alcohol charge.
- the feed is vaporized in the lines heated to 150-180°C upstream of the reactor then injected into the catalytic reactor.
- reaction effluent is carried out at the reactor outlet on an online gas chromatograph equipped with two columns, which makes it possible to determine the conversion of ethanol, the yields of different products and the selectivity to ethylene.
- the conversion to ethanol corresponds to the quantity of ethanol converted in relation to the quantity of ethanol introduced (expressed in % by weight).
- the yields correspond to the quantity of the product considered in the reaction effluent relative to the quantity of carbon-based ethanol introduced (expressed in % by weight).
- Ethylene selectivity corresponds to the quantity of ethylene recovered in the reaction effluent relative to the total quantity of carbon products in the reaction effluent (i.e. excluding water).
- catalyst B in accordance with the invention, (selectivity 97.1%) makes it possible to achieve an ethylene selectivity of 1. 4 points more than the ethylene selectivity obtained with catalyst A, not in accordance with the invention (selectivity 95.7%).
- Compliant catalyst B makes it possible to limit the formation of undesirable compounds (C4, C5+ and other oxygenated impurities, diethyl ether and acetaldehyde) to 2.75% (1.17+1.18+0.00+0.40) compared to 4. 12% (1.91+1.63+0.00+0.58) of undesirable compounds produced with non-compliant catalyst A.
- Example 3 Catalytic test of a charge containing 25% by weight of ethanol
- a charge comprising 25% by weight of ethanol and 75% by weight of water was tested on the same catalytic test unit as that described in Example 2.
- the catalyst is charged and activated as described in Example 2.
- the feed is vaporized in the lines heated to 150-180°C upstream of the reactor then injected into the catalytic reactor.
- Example 2 The analysis of the reaction effluent is carried out at the reactor outlet on an online gas chromatograph, as described in Example 2.
- the conversion of ethanol, the yields of different products and the selectivity to ethylene are determined as described. in Example 2.
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- Chemical Kinetics & Catalysis (AREA)
- Crystallography & Structural Chemistry (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
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Abstract
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Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP23836767.6A EP4638002A1 (fr) | 2022-12-22 | 2023-12-20 | Catalyseur a base d'une zeolithe et d'une structure alpo et presentant un volume macroporeux eleve |
| KR1020257020806A KR20250117801A (ko) | 2022-12-22 | 2023-12-20 | 제올라이트와 AlPO 구조를 기반으로 하며 높은 거대다공 부피를 갖는 촉매 |
| CN202380087615.XA CN120379760A (zh) | 2022-12-22 | 2023-12-20 | 基于沸石和alpo结构并具有高大孔体积的催化剂 |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FRFR2214298 | 2022-12-22 | ||
| FR2214298A FR3144023A1 (fr) | 2022-12-22 | 2022-12-22 | Catalyseur a base d’une zeolithe et d’une structure alpo et presentant un volume macroporeux eleve |
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| Publication Number | Publication Date |
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| WO2024133376A1 true WO2024133376A1 (fr) | 2024-06-27 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/EP2023/086814 Ceased WO2024133376A1 (fr) | 2022-12-22 | 2023-12-20 | Catalyseur a base d'une zeolithe et d'une structure alpo et presentant un volume macroporeux eleve |
Country Status (5)
| Country | Link |
|---|---|
| EP (1) | EP4638002A1 (fr) |
| KR (1) | KR20250117801A (fr) |
| CN (1) | CN120379760A (fr) |
| FR (1) | FR3144023A1 (fr) |
| WO (1) | WO2024133376A1 (fr) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0511013A2 (fr) | 1991-04-26 | 1992-10-28 | ARCO Chemical Technology, L.P. | Fabrication d'oléfines |
| US5753716A (en) | 1997-02-21 | 1998-05-19 | Air Products And Chemicals, Inc. | Use of aluminum phosphate as the dehydration catalyst in single step dimethyl ether process |
| US20060106270A1 (en) | 2004-11-12 | 2006-05-18 | Glover Bryan K | Selective conversion of oxygenate to propylene using moving bed technology and a hydrothermally stabilized dual-function catalyst |
| WO2009098262A1 (fr) | 2008-02-07 | 2009-08-13 | Total Petrochemicals Research Feluy | Déshydratation d’alcools sur des silicates cristallins |
| FR2978145A1 (fr) | 2011-07-21 | 2013-01-25 | IFP Energies Nouvelles | Procede de deshydratation de l'ethanol en ethylene a basse consommation energetique |
| WO2013017499A1 (fr) | 2011-08-03 | 2013-02-07 | Total Research & Technology Feluy | Procédé de fabrication d'un catalyseur comprenant une zéolithe modifiée par du phosphore et utilisation de ladite zéolithe |
| WO2013017498A1 (fr) | 2011-08-03 | 2013-02-07 | Total Research & Technology Feluy | Catalyseur comprenant une zéolithe modifiée par du phosphore et ayant partiellement une structure alpo |
| WO2013017496A1 (fr) | 2011-08-03 | 2013-02-07 | Total Research & Technology Feluy | Utilisation d'un catalyseur comprenant une zéolithe modifiée par du phosphore dans un procédé de déshydratation d'alcools |
-
2022
- 2022-12-22 FR FR2214298A patent/FR3144023A1/fr active Pending
-
2023
- 2023-12-20 EP EP23836767.6A patent/EP4638002A1/fr active Pending
- 2023-12-20 WO PCT/EP2023/086814 patent/WO2024133376A1/fr not_active Ceased
- 2023-12-20 CN CN202380087615.XA patent/CN120379760A/zh active Pending
- 2023-12-20 KR KR1020257020806A patent/KR20250117801A/ko active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0511013A2 (fr) | 1991-04-26 | 1992-10-28 | ARCO Chemical Technology, L.P. | Fabrication d'oléfines |
| US5753716A (en) | 1997-02-21 | 1998-05-19 | Air Products And Chemicals, Inc. | Use of aluminum phosphate as the dehydration catalyst in single step dimethyl ether process |
| US20060106270A1 (en) | 2004-11-12 | 2006-05-18 | Glover Bryan K | Selective conversion of oxygenate to propylene using moving bed technology and a hydrothermally stabilized dual-function catalyst |
| WO2009098262A1 (fr) | 2008-02-07 | 2009-08-13 | Total Petrochemicals Research Feluy | Déshydratation d’alcools sur des silicates cristallins |
| FR2978145A1 (fr) | 2011-07-21 | 2013-01-25 | IFP Energies Nouvelles | Procede de deshydratation de l'ethanol en ethylene a basse consommation energetique |
| WO2013017499A1 (fr) | 2011-08-03 | 2013-02-07 | Total Research & Technology Feluy | Procédé de fabrication d'un catalyseur comprenant une zéolithe modifiée par du phosphore et utilisation de ladite zéolithe |
| WO2013017497A1 (fr) | 2011-08-03 | 2013-02-07 | Total Research & Technology Feluy | Procédé de fabrication d'un catalyseur comprenant une zéolithe modifiée par du phosphore et utilisation de ladite zéolithe |
| WO2013017498A1 (fr) | 2011-08-03 | 2013-02-07 | Total Research & Technology Feluy | Catalyseur comprenant une zéolithe modifiée par du phosphore et ayant partiellement une structure alpo |
| WO2013017496A1 (fr) | 2011-08-03 | 2013-02-07 | Total Research & Technology Feluy | Utilisation d'un catalyseur comprenant une zéolithe modifiée par du phosphore dans un procédé de déshydratation d'alcools |
Non-Patent Citations (5)
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| "Studies on pore systems in catalysts V. The t method", J. CATAL., vol. 4, no. 3, 1965, pages 319 |
| DONGSHENG ZHANG ET AL: "Effect of P Content on the Catalytic Performance of P-modified HZSM-5 Catalysts in Dehydration of Ethanol to Ethylene", CATALYSIS LETTERS, KLUWER ACADEMIC PUBLISHERS-PLENUM PUBLISHERS, NE, vol. 124, no. 3-4, 8 April 2008 (2008-04-08), pages 384 - 391, XP019601372, ISSN: 1572-879X * |
| H. KNΔZINGERR. KΔHNE: "The Deshydration of Alcohols over Alumina. 1 : The reaction scheme", JOURNAL OF CATALYSIS, vol. 5, 1966, pages 264 - 270 |
| LEE Y J ET AL: "Novel aluminophosphate (AlPO) bound ZSM-5 extrudates with improved catalytic properties for methanol to propylene (MTP) reaction", APPLIED CATALYSIS A: GENERAL, ELSEVIER, AMSTERDAM, NL, vol. 374, no. 1-2, 1 February 2010 (2010-02-01), pages 18 - 25, XP026854601, ISSN: 0926-860X, [retrieved on 20091120] * |
| S.N. CHAUDHURI ET AL.: "Reactions of ethanol over ZSM-5", JOURNAL OF MOLECULAR CATALYSIS, vol. 62, 1990, pages 289 - 295 |
Also Published As
| Publication number | Publication date |
|---|---|
| EP4638002A1 (fr) | 2025-10-29 |
| KR20250117801A (ko) | 2025-08-05 |
| FR3144023A1 (fr) | 2024-06-28 |
| CN120379760A (zh) | 2025-07-25 |
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