CN1114493C - Catalyst and process for prodn. of alkyl benzene - Google Patents
Catalyst and process for prodn. of alkyl benzene Download PDFInfo
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- CN1114493C CN1114493C CN99113813A CN99113813A CN1114493C CN 1114493 C CN1114493 C CN 1114493C CN 99113813 A CN99113813 A CN 99113813A CN 99113813 A CN99113813 A CN 99113813A CN 1114493 C CN1114493 C CN 1114493C
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- zeolite
- catalyst
- alkylbenzene
- propylene
- reaction
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- 239000003054 catalyst Substances 0.000 title claims abstract description 53
- 150000004996 alkyl benzenes Chemical class 0.000 title claims abstract description 21
- 238000000034 method Methods 0.000 title claims abstract description 15
- 239000010457 zeolite Substances 0.000 claims abstract description 53
- 238000006243 chemical reaction Methods 0.000 claims abstract description 25
- 239000007791 liquid phase Substances 0.000 claims abstract description 3
- UHOVQNZJYSORNB-UHFFFAOYSA-N Benzene Chemical compound C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 claims description 57
- 229910021536 Zeolite Inorganic materials 0.000 claims description 52
- HNPSIPDUKPIQMN-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Al]O[Al]=O HNPSIPDUKPIQMN-UHFFFAOYSA-N 0.000 claims description 52
- KDLHZDBZIXYQEI-UHFFFAOYSA-N Palladium Chemical compound [Pd] KDLHZDBZIXYQEI-UHFFFAOYSA-N 0.000 claims description 38
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 34
- QQONPFPTGQHPMA-UHFFFAOYSA-N propylene Natural products CC=C QQONPFPTGQHPMA-UHFFFAOYSA-N 0.000 claims description 29
- 125000004805 propylene group Chemical group [H]C([H])([H])C([H])([*:1])C([H])([H])[*:2] 0.000 claims description 29
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 28
- 229910052751 metal Inorganic materials 0.000 claims description 19
- 239000002184 metal Substances 0.000 claims description 19
- 229910052763 palladium Inorganic materials 0.000 claims description 16
- 239000000377 silicon dioxide Substances 0.000 claims description 14
- RWGFKTVRMDUZSP-UHFFFAOYSA-N cumene Chemical compound CC(C)C1=CC=CC=C1 RWGFKTVRMDUZSP-UHFFFAOYSA-N 0.000 claims description 12
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 claims description 6
- YNQLUTRBYVCPMQ-UHFFFAOYSA-N Ethylbenzene Chemical group CCC1=CC=CC=C1 YNQLUTRBYVCPMQ-UHFFFAOYSA-N 0.000 claims description 4
- 150000001336 alkenes Chemical class 0.000 claims description 3
- JRZJOMJEPLMPRA-UHFFFAOYSA-N olefin Natural products CCCCCCCC=C JRZJOMJEPLMPRA-UHFFFAOYSA-N 0.000 claims description 3
- 239000002994 raw material Substances 0.000 claims description 3
- 230000008929 regeneration Effects 0.000 abstract description 6
- 238000011069 regeneration method Methods 0.000 abstract description 6
- 238000005516 engineering process Methods 0.000 abstract description 5
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 abstract 2
- 230000007547 defect Effects 0.000 abstract 1
- 229910052697 platinum Inorganic materials 0.000 abstract 1
- NLXLAEXVIDQMFP-UHFFFAOYSA-N Ammonia chloride Chemical compound [NH4+].[Cl-] NLXLAEXVIDQMFP-UHFFFAOYSA-N 0.000 description 14
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 14
- 230000000694 effects Effects 0.000 description 9
- 239000007788 liquid Substances 0.000 description 8
- 235000019270 ammonium chloride Nutrition 0.000 description 7
- 101150003085 Pdcl gene Proteins 0.000 description 6
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 description 6
- 238000005470 impregnation Methods 0.000 description 6
- 150000002500 ions Chemical class 0.000 description 6
- 230000001404 mediated effect Effects 0.000 description 6
- 239000000843 powder Substances 0.000 description 6
- 125000001436 propyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])[H] 0.000 description 6
- 239000011734 sodium Substances 0.000 description 6
- 239000002253 acid Substances 0.000 description 3
- 229910000147 aluminium phosphate Inorganic materials 0.000 description 3
- 150000003863 ammonium salts Chemical group 0.000 description 3
- 229910003445 palladium oxide Inorganic materials 0.000 description 3
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000002808 molecular sieve Substances 0.000 description 2
- URGAHOPLAPQHLN-UHFFFAOYSA-N sodium aluminosilicate Chemical compound [Na+].[Al+3].[O-][Si]([O-])=O.[O-][Si]([O-])=O URGAHOPLAPQHLN-UHFFFAOYSA-N 0.000 description 2
- 239000004254 Ammonium phosphate Substances 0.000 description 1
- 229910015900 BF3 Inorganic materials 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 description 1
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N Phenol Chemical compound OC1=CC=CC=C1 ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 description 1
- KEAYESYHFKHZAL-UHFFFAOYSA-N Sodium Chemical compound [Na] KEAYESYHFKHZAL-UHFFFAOYSA-N 0.000 description 1
- 229910000148 ammonium phosphate Inorganic materials 0.000 description 1
- 235000019289 ammonium phosphates Nutrition 0.000 description 1
- BFNBIHQBYMNNAN-UHFFFAOYSA-N ammonium sulfate Chemical compound N.N.OS(O)(=O)=O BFNBIHQBYMNNAN-UHFFFAOYSA-N 0.000 description 1
- 229910052921 ammonium sulfate Inorganic materials 0.000 description 1
- 235000011130 ammonium sulphate Nutrition 0.000 description 1
- -1 arene compound Chemical class 0.000 description 1
- WTEOIRVLGSZEPR-UHFFFAOYSA-N boron trifluoride Chemical compound FB(F)F WTEOIRVLGSZEPR-UHFFFAOYSA-N 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000002425 crystallisation Methods 0.000 description 1
- 230000008025 crystallization Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- MNNHAPBLZZVQHP-UHFFFAOYSA-N diammonium hydrogen phosphate Chemical compound [NH4+].[NH4+].OP([O-])([O-])=O MNNHAPBLZZVQHP-UHFFFAOYSA-N 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 125000001495 ethyl group Chemical group [H]C([H])([H])C([H])([H])* 0.000 description 1
- 238000005984 hydrogenation reaction Methods 0.000 description 1
- 229910001723 mesolite Inorganic materials 0.000 description 1
- 229910021645 metal ion Inorganic materials 0.000 description 1
- 229910017604 nitric acid Inorganic materials 0.000 description 1
- TVMXDCGIABBOFY-UHFFFAOYSA-N octane Chemical compound CCCCCCCC TVMXDCGIABBOFY-UHFFFAOYSA-N 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 230000002194 synthesizing effect Effects 0.000 description 1
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/50—Improvements relating to the production of bulk chemicals
- Y02P20/52—Improvements relating to the production of bulk chemicals using catalysts, e.g. selective catalysts
Landscapes
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
- Catalysts (AREA)
Abstract
The present invention relates to a catalyst and a method thereof for producing alkyl benzene. The method mainly overcomes the defects that the existing catalysts have poor stability, short regeneration period and low air speed for usage. The present invention uses a technology in which catalysts for platinum are loaded on zeolites and react under the conditions of liquid phase, the reaction temperature interval from 150 to 250 DEG C, and the reaction pressure range from 0.7 to 4.0MPa, so that the problems are well solved. Therefore, the present invention can be used in producing alkylbenzene.
Description
The present invention relates to the method that is used to produce the catalyst of alkylbenzene and adopts this Catalyst Production alkylbenzene, more particularly, the present invention relates to the zeolite catalyst of carried metal palladium and adopt it to produce the method for alkylbenzene.
Isopropylbenzene is a kind of important Organic Chemicals, belongs to the substituted arene compound.It is a main intermediate compound of producing phenol, acetone and AMS, also is simultaneously the auxiliary element as aviation gasoline, to increase the octane number of gasoline.The catalyst of propylene and benzene synthesizing iso-propylbenzene has multiple, traditional catalyst that crystallization and noncrystalline silica, boron fluoride, aluminium oxide and phosphoric acid, alchlor and solid phosphoric acid catalyst are arranged.All there are shortcomings such as seriously corroded, equipment investment is big, the three wastes are many in these conventional catalyst technologies.In recent years, deep day by day along with molecular sieve research, people are conceived to develop the new technology that zeolite catalyst is produced isopropylbenzene.Reported the new technology of utilizing the y-type zeolite molecular sieve to produce isopropylbenzene among the patent documentation EP0272830.This patented technology has overcome the deficiency of using traditional catalyst to exist, but also there is the poor stability of catalyst in it, the regeneration period short (just needed in 700 hours for example driving regeneration); Reaction velocity is low (for example in propylene air speed 0.10hr only
-1), shortcoming such as plant capacity is low.
One of purpose of the present invention is the shortcoming that has poor catalyst stability in the above-mentioned document in order to overcome, and a kind of new catalyst that is used to produce alkylbenzene is provided, and this catalyst has the characteristics of good stability.
Two of purpose of the present invention is short in order to overcome in the above-mentioned document regeneration period, and the shortcoming that reaction velocity is low provides a kind of new method that is used to produce alkylbenzene, and this method has production capacity and can improve, the characteristics that the catalyst regeneration cycle is long.
One of purpose of the present invention is to realize by following technical scheme: a kind of catalyst that is used to produce alkylbenzene, form by following component:
A) silica alumina ratio is 2～20 zeolite and is stated from the zeolite;
B) be 0.008～0.045% Metal Palladium by weight percentage.
The silica alumina ratio of technique scheme mesolite is 2～8, and zeolite is Y zeolite, β zeolite, modenite or ZSM-5 zeolite, and its preferred version is the Y zeolite, and alkylbenzene is ethylbenzene or isopropylbenzene.
Two of purpose of the present invention is to realize by following technical scheme: a kind of method that is used to produce alkylbenzene, with propylene or ethene and benzene is raw material, in reaction temperature is 150～250 ℃, reaction pressure is 0.7～4.0MPa, benzene/olefin molar ratio is that liquid phase is synthetic under 4～20 conditions, and catalyst system therefor is made up of following component:
A) silica alumina ratio is 2～20 zeolite and is stated from the zeolite;
B) be 0.008～0.045% Metal Palladium by weight percentage.
The reaction temperature preferred version is 180～210 ℃ in the technique scheme, and the reaction pressure preferred version is 2.0～3.5MPa.
Catalyst of the present invention can prepare as follows:
A) with silica alumina ratio be 2～20 zeolite with acid, ammonium salt exchange, make the content of sodium metal ion in zeolitic frameworks below 0.1% (weight), then oven dry;
B) impregnating metal palladium on zeolite.
The acid and the ammonium salt that are used to handle zeolite can be acid commonly used and ammonium salt, for example hydrochloric acid, nitric acid or phosphoric acid etc., and ammonium chloride, ammonium sulfate or ammonium phosphate etc.
Method of the present invention is carried out in the fixed bed mode usually.
The present invention is 0.008～0.045% Metal Palladium by weight percentage by load on zeolite, suppressed the carbon distribution that reaction mass generates at the catalyst surface dehydrocyclization effectively, thereby improved the reaction stability of catalyst, prolonged the regeneration period of catalyst.Use catalyst of the present invention that the hydrogenation reaction of raw material olefin does not take place in course of reaction in addition, by using two the technical scheme that realizes purpose, making reaction mass is 2.0 hours in weight liquid air speed
-1Reaction is 1000 hours under the condition, uses Y or β zeolite, does not detect propylene or ethene in its product, and activity of such catalysts, selectivity do not descend, and have obtained effect preferably.The reaction mechanism inventor of the present invention still is difficult to get across at present.
The invention will be further elaborated below by embodiment.
[embodiment 1]
Getting 100 gram silica alumina ratios is 5.0 NaY type zeolite powder, with the hydrochloric acid exchange, with the ammonium chloride exchange, makes the Na in the zeolite again
+Ion concentration is less than 0.1% (weight).Will be through the zeolite PdCl of above-mentioned processing
2Solution impregnation makes that Metal Palladium content is 0.003% (weight) in the catalyst, after oven dry, the roasting, grinds evenly.Is that 90: 10 amount is mediated with the zeolite of carried metal palladium and aluminium oxide with weight ratio, and pressure forming is the shape of 1.6 millimeters of φ.
[embodiment 2]
Getting 100 gram silica alumina ratios is 5.0 NaY type zeolite powder, with the hydrochloric acid exchange, with the ammonium chloride exchange, makes the Na in the zeolite again
+Ion concentration is less than 0.1% (weight).Will be through the zeolite PdCl of above-mentioned processing
2Solution impregnation makes that Metal Palladium content is 0.02% (weight) in the catalyst, after oven dry, the roasting, grinds evenly.Is that 90: 10 amount is mediated with the zeolite of carried metal palladium and aluminium oxide with weight ratio, and pressure forming is the shape of 1.6 millimeters of φ.
[embodiment 3]
Getting 100 gram silica alumina ratios is 5.0 NaY type zeolite powder, with the hydrochloric acid exchange, with the ammonium chloride exchange, makes the Na in the zeolite again
+Ion concentration is less than 0.1% (weight).Will be through the zeolite PdCl of above-mentioned processing
2Solution impregnation makes that Metal Palladium content is 0.008% (weight) in the catalyst, after oven dry, the roasting, grinds evenly.Is that 90: 10 amount is mediated with the zeolite of carried metal palladium and aluminium oxide with weight ratio, and pressure forming is the shape of 1.6 millimeters of φ.
[embodiment 4]
Getting 100 gram silica alumina ratios is 5.0 NaY type zeolite powder, with the hydrochloric acid exchange, with the ammonium chloride exchange, makes the Na in the zeolite again
+Ion concentration is less than 0.1% (weight).Will be through the zeolite PdCl of above-mentioned processing
2Solution impregnation makes that Metal Palladium content is 0.045% (weight) in the catalyst, after oven dry, the roasting, grinds evenly.The zeolite and the aluminium oxide of carried metal palladium are mediated with 90: 10 amount of weight ratio, and pressure forming is the shape of 1.6 millimeters of φ.
[embodiment 5]
Getting 100 gram silica alumina ratios is 14.0 the former powder of zeolite beta, with the hydrochloric acid exchange, with the ammonium chloride exchange, makes the Na in the zeolite again
+Ion concentration is less than 0.1% (weight).Will be through the zeolite PdCl of above-mentioned processing
2Solution impregnation makes that Metal Palladium content is 0.035% (weight) in the catalyst, after oven dry, the roasting, grinds evenly.The zeolite and the aluminium oxide of carried metal palladium are mediated with 90: 10 amount of weight ratio, and pressure forming is the shape of 1.6 millimeters of φ.
[embodiment 6]
Getting 100 gram silica alumina ratios is 20.0 ZSM-type zeolite powder, with the hydrochloric acid exchange, with the ammonium chloride exchange, makes the Na in the zeolite again
+Ion concentration is less than 0.1% (weight).Will be through the zeolite PdCl of above-mentioned processing
2Solution impregnation makes that Metal Palladium content is 0.03% (weight) in the catalyst, after oven dry, the roasting, grinds evenly.The zeolite and the aluminium oxide of carried metal palladium are mediated with 90: 10 amount of weight ratio, and pressure forming is the shape of 1.6 millimeters of φ.
[embodiment 7]
Catalyst 21 grams of getting embodiment 1 place fixed bed reactors, under 210 ℃, 2.6MPa condition, benzene and propylene are reacted by beds, wherein the benzene inlet amount is 702 Grams Per Hours, the propylene feed amount is 42 Grams Per Hours, is 2.0 hours with propylene calculated weight liquid air speed
-1This reaction was investigated through 1000 hours, did not detect propylene in the product, and activity of such catalysts, selectivity do not descend.Selectivity is 97.5% (calculating with propyl group).
[embodiment 8]
Catalyst 21 grams of getting embodiment 2 place fixed bed reactors, under 200 ℃, 2.6MPa condition, benzene and propylene are reacted by beds, wherein the benzene inlet amount is 585 Grams Per Hours, the propylene feed amount is 42 Grams Per Hours, is 2.0 hours with propylene calculated weight liquid air speed
-1This reaction was investigated through 1000 hours, did not detect propylene in the product, and activity of such catalysts, selectivity do not descend.Selectivity is 98.0% (calculating with propyl group).
[embodiment 9]
Catalyst 21 grams of getting embodiment 3 place fixed bed reactors, under 205 ℃, 2.6MPa condition, benzene and propylene are reacted by beds, wherein the benzene inlet amount is 670 Grams Per Hours, the propylene feed amount is 42 Grams Per Hours, is 2.0 hours with propylene calculated weight liquid air speed
-1This reaction was investigated through 1000 hours, did not detect propylene in the product, and activity of such catalysts, selectivity do not descend.Selectivity is 97.7% (calculating with propyl group).
[embodiment 10]
Catalyst 21 grams of getting embodiment 4 place fixed bed reactors, under 195 ℃, 2.6MPa condition, benzene and propylene are reacted by beds, wherein the benzene inlet amount is 468 Grams Per Hours, the propylene feed amount is 42 Grams Per Hours, is 2.0 hours with propylene calculated weight liquid air speed
-1This reaction was investigated through 1000 hours, did not detect propylene in the product, and activity of such catalysts, selectivity do not descend.Selectivity is 98.0% (calculating with propyl group).
[embodiment 11]
Catalyst 21 grams of getting embodiment 5 place fixed bed reactors, under 215 ℃, 2.6MPa condition, benzene and propylene are reacted by beds, wherein the benzene inlet amount is 702 Grams Per Hours, the propylene feed amount is 42 Grams Per Hours, is 2.0 hours with propylene calculated weight liquid air speed
-1This reaction was investigated through 1000 hours, did not detect propylene in the product, and activity of such catalysts, selectivity do not descend.Selectivity is 96.0% (calculating with propyl group).
[embodiment 12]
Catalyst 84 grams of getting embodiment 6 place fixed bed reactors, under 215 ℃, 2.6MPa condition, benzene and propylene are reacted by beds, wherein the benzene inlet amount is 702 Grams Per Hours, the propylene feed amount is 42 Grams Per Hours, is 2.0 hours with propylene calculated weight liquid air speed
-1This reaction was investigated through 45 hours, did not detect propylene in the product, and activity of such catalysts, selectivity do not descend.Selectivity is 95.0% (calculating with propyl group).
[embodiment 13]
Catalyst 21 gram of getting embodiment 4 places fixed bed reactors, under 250 ℃, 4.0MPa condition, benzene and ethene is reacted by beds, and wherein the benzene inlet amount is 400 Grams Per Hours, is 0.5 hour with ethene calculated weight liquid air speed
-1This reaction was investigated through 1000 hours, did not detect ethene in the product, and activity of such catalysts, selectivity do not descend.Selectivity is 90.0% (calculating with ethyl).
Claims (8)
1, a kind of catalyst that is used to produce alkylbenzene, form by following component:
A) silica alumina ratio is 2～20 zeolite and is stated from the zeolite;
B) be 0.008～0.045% Metal Palladium by weight percentage.
2, according to the described catalyst that is used to produce alkylbenzene of claim 1, the silica alumina ratio that it is characterized in that zeolite is 2～8.
3,, it is characterized in that zeolite is Y zeolite, β zeolite, modenite or ZSM-5 zeolite according to the described catalyst that is used to produce alkylbenzene of claim 1.
4,, it is characterized in that zeolite is the Y zeolite according to the described catalyst that is used to produce alkylbenzene of claim 3.
5,, it is characterized in that alkylbenzene is ethylbenzene or isopropylbenzene according to claim 1,2, the 3 or 4 described catalyst that are used to produce alkylbenzene.
6, a kind of method that is used to produce alkylbenzene, with propylene or ethene and benzene is raw material, is 150～250 ℃ in reaction temperature, and reaction pressure is 0.7～4.0MPa, benzene/olefin molar ratio is that liquid phase is synthetic under 4～20 conditions, it is characterized in that catalyst system therefor is made up of following component:
A) silica alumina ratio is 2～20 zeolite and is stated from the zeolite;
B) be 0.008～0.045% Metal Palladium by weight percentage.
7,, it is characterized in that reaction temperature is 180～210 ℃ according to the described method that is used to produce alkylbenzene of claim 6.
8,, it is characterized in that reaction pressure is 2.0～3.5MPa according to the described method that is used to produce alkylbenzene of claim 6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN99113813A CN1114493C (en) | 1999-06-24 | 1999-06-24 | Catalyst and process for prodn. of alkyl benzene |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN99113813A CN1114493C (en) | 1999-06-24 | 1999-06-24 | Catalyst and process for prodn. of alkyl benzene |
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| Publication Number | Publication Date |
|---|---|
| CN1287885A CN1287885A (en) | 2001-03-21 |
| CN1114493C true CN1114493C (en) | 2003-07-16 |
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|---|---|---|---|
| CN99113813A Expired - Fee Related CN1114493C (en) | 1999-06-24 | 1999-06-24 | Catalyst and process for prodn. of alkyl benzene |
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| CN111330631B (en) * | 2020-04-08 | 2022-09-16 | 中国石油大学(华东) | Preparation method of modified molecular sieve loaded Pd catalyst and application of modified molecular sieve loaded Pd catalyst in synthesis of dimethyl carbonate by gas phase method |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62246532A (en) * | 1986-04-16 | 1987-10-27 | Maruzen Petrochem Co Ltd | Alkylation of phenol |
| CN1155531A (en) * | 1996-01-25 | 1997-07-30 | 中国石油化工总公司 | Process for preparation of alkyl benzene |
-
1999
- 1999-06-24 CN CN99113813A patent/CN1114493C/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62246532A (en) * | 1986-04-16 | 1987-10-27 | Maruzen Petrochem Co Ltd | Alkylation of phenol |
| CN1155531A (en) * | 1996-01-25 | 1997-07-30 | 中国石油化工总公司 | Process for preparation of alkyl benzene |
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| CN1287885A (en) | 2001-03-21 |
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