EP0012570A2
Expired / Lapsed
EP
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Selective reaction of 1,4-disubstituted benzene compounds
Assignee: Mobil Oil AS
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Filing: 1979-12-06
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Granted: —
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Expires: 1999-12-06
Abstract
Abstract isomeric mixtures of disubstituted aromatic compounds are brought into contact with a shape selective crystalline zeolite catalyst, under conversion conditions, to undergo selective reaction of the 1,4-isomer, thereby leaving the 1-2-isomer and/or 1,3-isomer in excess of equilibrium. The shape selective zeolite catalyst employed herein comprises a crystalline zeolite having a silica to alumina ratio of at least 12 and a constraint index, as herein defined, within the approximate range of 1 to 12.
Inventors
- 👤 Margaret May-Som Wu
- 👤 Lewis Bewster Young
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-06 06:17
CPC Classifications
C; C07; C07C; C07C209/00; C07C209/68; B; B01; B01J; B01J29/00; B01J29/04; B01J29/06; B01J29/40; B01J29/70; C07C17/00; C07C17/361; C07C37/00; C07C37/50; C07C37/68; C07C37/86; C07C4/00; C07C4/08; C07C4/12; C07C4/14; C07C4/18; C07C45/00; C07C45/61; C07C45/67; C07C45/78; C07C45/85; C07C7/00; C07C7/148; B01J2229/00; B01J2229/10; B01J2229/20; B01J2229/26; B01J2229/30; B01J2229/36; B01J2229/42; C07C2529/00; C07C2529/04; C07C2529/06; C07C2529/40; C07C2529/70; Y; Y02; Y02P; Y02P20/00; Y02P20/50; Y02P20/52
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
88 words
A process for selective reaction of 1,4-disubstituted aromatic conpounds in a mixture comprising disubstituted aromatic isomers, the process comprising contacting said mixture, under conversion conditions, with a crystalline zeolite catalyst, said catalyst characterized by a silica to alumina ratio of at least about 12 and a constraint index within the approximate range of 1 to 12, to yield a product in which the' content of said 1, 4-disubstituted aromatic compounds is reduced relative to the content of said disubstituted aromatic isomers in said mixture prior to said contacting.
Claim 2
Dependent Claim
88 words
A process for selective reaction of 1,4-disubstituted aromatic conpounds in a mixture comprising disubstituted aromatic isomers, the process comprising contacting said mixture, under conversion conditions, with a crystalline zeolite catalyst, said catalyst characterized by a silica to alumina ratio of at least about 12 and a constraint index within the approximate range of 1 to 12, to yield a product in which the' content of said 1, 4-disubstituted aromatic compounds is reduced relative to the content of said disubstituted aromatic isomers in said mixture prior to said contacting.
Claim 3
Dependent Claim
13 words
The process of claim 1 wherein said 1,4-disubstituted aromatic compound is a 1,4-dialkylbenzene.
Claim 4
Dependent Claim
16 words
The process of claim 2 wherein said 1,4-dialkylbenzene is 1,4-diiscprcpylbenzene, 1-ethyl-4-methylbenzene, 1,4-diethylbenzene, 1-t-butyl-4-methylbenzene, or is 1-isopropyl-4-methylbenzene.
Claim 5
Dependent Claim
20 words
The process of claim 1 wherein said disubstituted aromatic compounds have one polar substituent and one substantially non-polar substituent thereon.
Claim 6
Dependent Claim
15 words
The process of claim 1 wherein said disubstituted aromatic compounds have two polar substituents thereon
Claim 7
Dependent Claim
72 words
The process of claim 4 or claim 5 wherein the polar 1,4-disubstituted aromatic compounds are in admixture with cne or more other polar aromatic compounds selected from the group ccnsisting of 1,2-disubstituted aromatic compounds having at least one polar substituent and 1,3-disubstituted aromatic compounds having at least one polar substituent, said process resulting in a substantial reduction in the amount of said polar 1,4-disubstituted conpound relative to said other polar aromatic compounds.
Claim 8
Dependent Claim
36 words
7 .. The process of any preceding claim wherein said conversion conditions include a temperature between about 150°C and about 800°C, a pressure between about 10 4 N/m 2 and about 10 7 N/m 2 .
Claim 9
Dependent Claim
34 words
The process of any preceding claim wherein said conversion conditions include a tenperature between about 250°C and about 550°C, a pressure between about 2X10 4 N/m 2 and about 2.5X10 6 N/m 2 .
Claim 10
Dependent Claim
34 words
The process of any preceding claim wherein said crystalline zeolite has undergone prior modification by combining therewith between about 0.5 and about 40 wieght percent of an oxide of phosphorus, antimony, boron and/or magnesium.
Claim 11
Dependent Claim
29 words
The process of claim 9 wherein said crystalline zeolite has undergone prior modification by cambining therewith between about 1 and about 25 weight percent of an oxide of phosphorus.
Claim 12
Dependent Claim
29 words
The process of claim 9 wherein said crystalline zeolite has undergone prior modification by combining therewith between about 1 and about 25 weight percent of an oxide of magnesium
Claim 13
Dependent Claim
39 words
The process of any of claims 1 to 8 wherein said crystalline zeolite has undergone prior modification by steaming at a temperature between about 250°C and about 1000°C for a period of between about 0.5 and about 100 hours.
Claim 14
Dependent Claim
15 words
The process of any preceding claim wherein said crystalline zeolite is ZSM-5, ZSM-11 or ZSM-23.
Claim 15
Dependent Claim
15 words
The process of any preceding claim wherein said zeolite is admixed with a binder therefor.
Claim 16
Dependent Claim
27 words
The process of any preceding claim wherein said mixture containing said 1,4-disubstituted aromatic compound is admixed with a diluent prior to cantacting it with said zeolite catalyst.
References Cited (Backward Citations)
No citation records indexed.
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