EP3911627A1 - Procédé de prépraration d'un composé de formule rsh par hydrosulfuration - Google Patents
Procédé de prépraration d'un composé de formule rsh par hydrosulfurationInfo
- Publication number
- EP3911627A1 EP3911627A1 EP20707306.5A EP20707306A EP3911627A1 EP 3911627 A1 EP3911627 A1 EP 3911627A1 EP 20707306 A EP20707306 A EP 20707306A EP 3911627 A1 EP3911627 A1 EP 3911627A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- catalyst
- mixed
- rare earth
- reaction
- sulphides
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
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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
- B01J21/00—Catalysts comprising the elements, oxides, or hydroxides of magnesium, boron, aluminium, carbon, silicon, titanium, zirconium, or hafnium
- B01J21/02—Boron or aluminium; Oxides or hydroxides thereof
- B01J21/04—Alumina
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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
- B01J23/00—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00
- B01J23/02—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of the alkali- or alkaline earth metals or beryllium
- B01J23/04—Alkali metals
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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
- B01J23/00—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00
- B01J23/10—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of rare earths
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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
- B01J35/40—Catalysts, in general, characterised by their form or physical properties characterised by dimensions, e.g. grain size
- B01J35/45—Nanoparticles
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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
- B01J35/61—Surface area
- B01J35/613—10-100 m2/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
- 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
- B01J35/61—Surface area
- B01J35/615—100-500 m2/g
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C319/00—Preparation of thiols, sulfides, hydropolysulfides or polysulfides
- C07C319/02—Preparation of thiols, sulfides, hydropolysulfides or polysulfides of thiols
- C07C319/06—Preparation of thiols, sulfides, hydropolysulfides or polysulfides of thiols from sulfides, hydropolysulfides or polysulfides
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C319/00—Preparation of thiols, sulfides, hydropolysulfides or polysulfides
- C07C319/02—Preparation of thiols, sulfides, hydropolysulfides or polysulfides of thiols
- C07C319/08—Preparation of thiols, sulfides, hydropolysulfides or polysulfides of thiols by replacement of hydroxy groups or etherified or esterified hydroxy groups
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C319/00—Preparation of thiols, sulfides, hydropolysulfides or polysulfides
- C07C319/14—Preparation of thiols, sulfides, hydropolysulfides or polysulfides of sulfides
-
- 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
- B01J2523/00—Constitutive chemical elements of heterogeneous catalysts
Definitions
- TITLE PROCESS FOR PREPARING A COMPOUND OF FORMULA RSH BY HYDROSULFURATION
- the invention relates to a process for the catalytic gas phase hydrosulfurization of a corresponding thiol alcohol. It is more particularly described for the manufacture of methanethiol from methanol and from hydrogen sulphide, without its scope being restricted therein.
- the invention provides a method which satisfies these requirements.
- This process makes it possible to prepare a compound of formula RSH where R represents an alkyl group, by gas phase catalytic reaction of hydrogen sulphide with a compound of formula ROH, in the presence of a solid catalyst, this catalyst comprising or consisting of a or pure or mixed rare earth (s) oxides, pure or mixed rare earth (s) sulphide (s) or pure rare earth (s) oxy-sulphide (s) or mixed, provided that when the rare earth is lanthanum, said catalyst is a mixed oxide of lanthanum and at least one metal selected from rare earths and when the rare earth is cerium, said catalyst is supported.
- a solid catalyst comprising or consisting of a or pure or mixed rare earth (s) oxides, pure or mixed rare earth (s) sulphide (s) or pure rare earth (s) oxy-sulphide (s) or mixed, provided that when the rare earth is lanthanum, said catalyst is a mixed oxide of lanthanum and at least one metal selected from rare earths and when
- the selectivity was improved significantly compared to the catalysts described in the prior art, in particular by a decrease which can reach an order of magnitude of at least 40% in non-products.
- recoverable products such as carbon monoxide, carbon dioxide, methane, hydrogen and dimethyl ether.
- the main product is methanethiol, and dimethylsulfide constitutes the majority secondary product.
- the latter can be skillfully recycled to be converted to methanethiol, thus increasing the overall yield of the methanethiol process.
- the reaction can be carried out over a wider and generally lower temperature range than those of known processes. More generally, this process has the advantage of being flexible and depending on the operating conditions such as the temperature, the selectivity can be oriented towards one product or another.
- rare earths we mean the 15 lanthanides (lanthanum, cerium, praseodymium, neodymium, promethium, samarium, europium, gadolinium, terbium, dysprosium, holmium, erbium, thulium, ytterbium and lutetium), as well as scandium and yttrium.
- lanthanides lanthanum, cerium, praseodymium, neodymium, promethium, samarium, europium, gadolinium, terbium, dysprosium, holmium, erbium, thulium, ytterbium and lutetium
- the catalyst may be present in the form of an oxide (or oxyhydroxide), sulphide and any intermediate form containing S and O which is called oxysulphide.
- alkyl denotes a linear or branched monovalent hydrocarbon radical having from 1 to 20 carbon atoms, advantageously from 1 to 6 carbon atoms, such as methyl or ethyl , propyl, isopropyl, butyl, isobutyl, tert-butyl, pentyl, neopentyl, n-hexyl or a cyclic monovalent hydrocarbon radical having from 3 to 20 carbon atoms, advantageously from 3 to 6 carbon atoms, such as cyclopropyl, cyclohexyl, but not limited to these radicals.
- the catalyst is chosen from rare earth oxides, hydroxides or even rare earth oxyhydroxides and at least one other metal which is not a rare earth.
- the catalyst can also be chosen from mixed oxides (hydroxides or oxyhydroxides) of rare earths and of at least one other metal which is not a rare earth.
- mixed oxides is understood to mean an oxide based on several rare earths.
- the catalyst can also be chosen from mixed sulphides of several rare earths, mixed sulphides of one or more rare earths and at least one other metal which is not a rare earth, oxy-sulphides of several rare earths.
- mixed oxidesulfides of one or more rare earths and at least one other metal which is not a rare earth and mixtures of said mixed oxides, mixed sulfides and mixed oxidesulfides.
- Said metal which is not a rare earth is preferably zirconium.
- the catalyst may also comprise, in addition to the aforementioned oxides, sulphides and / or oxysulphides, one or more oxides of different rare earth metals.
- the catalyst is supported, advantageously on alumina, pretreated or not, which makes it possible to circumvent the problems of blockages which can potentially be observed in the presence of materials based on rare earths in powder form.
- the process of the invention is particularly advantageous for the preparation of methanethiol by catalytic hydrosulfurization of methanol, but it may be suitable for obtaining any RSH compound, where R is an alkyl as defined above.
- the catalyst comprises or consists of mixed oxides of lanthanum, cerium, neodymium and zirconium; in this combination, the proportions of zirconium oxide and cerium are in the majority relative to those of the oxides of lanthanum and of neodymium.
- a support has also been developed which makes it possible to increase the performance of the catalysts used.
- This support can be an alumina modified with potassium, with a potassium content of between 0.1% and 20% (m / m), preferably between 0.5% and 10%, and more preferably between 0.5% and 5%.
- the use of ceria supported on an alumina thus modified is reported, in a range of supported cerium oxide contents of between 0.1% and 50% (m / m), preferably between 0.5% and 30% (m / m).
- the ratio of hydrogen sulphide to the ROH compound preferably ranges from 0.5 to 20, preferably from 1 to 15, and more preferably from 1 to 10.
- reaction temperatures it was previously indicated that one of the interests of the invention was to be able to widen the range of reaction temperatures.
- it can be carried out at a temperature of 200 ° C to 450 ° C, preferably from 250 ° C to 420 ° C, and more preferably from 275 ° C to 400 ° C, advantageously under a pressure of between 2 and 20 bar , preferably from 5 to 15 bar, and even more preferably from 7 to 14 bar and for a contact time of the ROH compound with the catalyst ranging from 0.1 seconds to 60 seconds.
- reaction is highly selective for methanethiol
- dimethylsulfide can also be formed.
- a reaction of catalytic conversion of said dimethylsulfide into methanethiol can then be carried out in addition, according to techniques well known to those skilled in the art, in order to further improve the yield of the process in methanethiol.
- Example 1 Manufacture of methanethiol from methanol, in the presence of a catalyst based on mixed oxides, according to the invention
- the catalyst was prepared by synthetic routes of mild chemistry. For example, it can be obtained according to the method described in patent FR2907445A1 or patent FR2859470A1.
- the specific surface of this catalyst is 75 m 2 .g _1 .
- the composition by weight of oxides is 2.0% La2O 3 , 21.3% CeO2, 5.1% Nd2O 3 and 71.6% ZrO 2 .
- a catalytic bed of 2 ml of catalyst diluted in carborundum with a particle size of between 0.400 and 0.500 nm is placed in a reactor with an internal diameter of 1.26 cm.
- the reactor inlet gases consist of a mixture of methanol and hydrogen sulfide.
- the process of the invention exhibits both a higher conversion of methanol and a higher selectivity to methanethiol, while producing very small quantities of light gases in favor of a greater selectivity to dimethylsulfide.
- Example 2 Manufacture of methanethiol from methanol, in the presence of a catalyst based on mixed oxides, according to the invention
- Cat2 catalyst is prepared using the same technique as Cat1 catalyst above.
- the specific surface of this catalyst is 59 m 2 .g _1 .
- the composition by weight of oxides is 1.75% of La2O 3 , 30.3% of Ced, 5.35% of Nd2O 3 and 62.6% of Zr0 2 .
- the performances of the catalysts were compared over a wide range of methanol conversions by varying the mass of catalyst introduced and the flow rate of the various reactants.
- Example 3 Manufacture of methanethiol from methanol. in the presence of a catalyst based on cerium oxide, supported on modified alumina, according to the invention
- the supported CatS3 catalyst is synthesized by successive impregnations and calcinations (450 ° C in air) of 100 g of commercial alumina with a specific surface area of 171 m 2 .g 1 with a solution of potassium hydroxide (38 g / L), then with a solution of cerium (III) nitrate (1151 g / L).
- the potassium content is 1.5% by mass, that of cerium oxide 3.5% by mass.
- the specific surface of the catalyst is 167 m 2 .g 1
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Catalysts (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR1922463 | 2019-01-18 | ||
| PCT/FR2020/050060 WO2020148510A1 (fr) | 2019-01-18 | 2020-01-16 | Procédé de prépraration d'un composé de formule rsh par hydrosulfuration |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP3911627A1 true EP3911627A1 (fr) | 2021-11-24 |
Family
ID=78232394
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP20707306.5A Pending EP3911627A1 (fr) | 2019-01-18 | 2020-01-16 | Procédé de prépraration d'un composé de formule rsh par hydrosulfuration |
Country Status (1)
| Country | Link |
|---|---|
| EP (1) | EP3911627A1 (fr) |
-
2020
- 2020-01-16 EP EP20707306.5A patent/EP3911627A1/fr active Pending
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| RIC1 | Information provided on ipc code assigned before grant |
Ipc: B01J 35/61 20240101ALI20241220BHEP Ipc: B01J 35/45 20240101ALI20241220BHEP Ipc: B01J 23/10 20060101ALI20241220BHEP Ipc: B01J 23/04 20060101ALI20241220BHEP Ipc: B01J 21/04 20060101ALI20241220BHEP Ipc: C07C 321/14 20060101ALI20241220BHEP Ipc: C07C 321/04 20060101ALI20241220BHEP Ipc: C07C 319/14 20060101ALI20241220BHEP Ipc: C07C 319/06 20060101ALI20241220BHEP Ipc: C07C 319/08 20060101AFI20241220BHEP |
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