EP0087906A1
Expired / Lapsed
EP
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Xylene isomerization process and catalyst therefor
Assignee: Mobil Oil AS
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Filing: 1983-02-22
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Granted: —
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Expires: 2003-02-22
Abstract
Abstract Isomerization of xylene in admixture with ethylbenzene by contact with a zeolite catalyst such as ZSM-5 is improved by use of a zeolite having a catalyst particle size of at least 1 micron and having incorporated thereon two metals in the form of platinum and magnesium.
Inventors
- 👤 Yung-Feng Chu
- 👤 Fritz Arthur Smith
- 👤 Arthur Warren Chester
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-06 14:04
CPC Classifications
B; B01; B01J; B01J29/00; B01J29/04; B01J29/06; B01J29/40; B01J29/42; B01J29/44; C; C07; C07C; C07C5/00; C07C5/22; C07C5/27; C07C5/2702; C07C5/2724; Y; Y02; Y02P; Y02P20/00; Y02P20/50; Y02P20/52
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
72 words
A process for isomerizing an isomerization feed containing an aromatic C 8 mixture of ethylbenzene and xylene which comprises contacting said feed, under conversion conditions, with a catalyst comprising a crystalline aluminosilicate zeolite having a crystal size of at least 1 micron, a silica to alumina ratio of at least 12 and a . constraint index within the range 1 to 12, said zeolite containing platinum and a Group 2A metal component.
Claim 2
Dependent Claim
72 words
A process for isomerizing an isomerization feed containing an aromatic C 8 mixture of ethylbenzene and xylene which comprises contacting said feed, under conversion conditions, with a catalyst comprising a crystalline aluminosilicate zeolite having a crystal size of at least 1 micron, a silica to alumina ratio of at least 12 and a . constraint index within the range 1 to 12, said zeolite containing platinum and a Group 2A metal component.
Claim 3
Dependent Claim
42 words
The process of claim 1 wherein said conversion conditions include a temperature of from 500°F to 1000°F (260°C to 538°C), a pressure of 0 to 1500 psig (101 to 10444 kPa) and a weight hourly space velocity of between 0.5 and 100.
Claim 4
Dependent Claim
15 words
The process of claim 1 or claim 2 wherein the Group 2A metal is magnesium.
Claim 5
Dependent Claim
16 words
The process of any preceding claim wherein the zeolite is ZSM-5, ZSM-11, ZSM-12, ZSM-35, or ZSM-38.
Claim 6
Dependent Claim
13 words
The process of any preceding claim wherein said crystalline aluminosilicate zeolite is ZSM-5.
Claim 7
Dependent Claim
18 words
The process of any preceding claim wherein said crystalline aluminosilicate zeolite is ZSM-5 predominately in the hydrogen form.
Claim 8
Dependent Claim
24 words
The process of any preceding claim wherein the crystal size of said crystalline aluminosilicate zeolite is within the range of 1 to 20 microns.
Claim 9
Dependent Claim
24 words
The process of any preceding claim wherein the crystal size of said crystalline aluminosilicate zeolite is within the range of 1 to 6 microns.
Claim 10
Dependent Claim
53 words
A catalyst for use in the process as claimed in any preceding claim comprising a crystalline aluminosilicate zeolite having a crystal size of at least 1 micron, a silica to alumina ratio of at least 12 and a constraint index within the range of 1 to 12, said zeolite containing platinum and magnesium.
Claim 11
Dependent Claim
43 words
A catalyst as claimed in claim 9 wherein the zeolite has incorporated therein platinum and magnesium alone, with the platinum constituting between 0.01% and 1% by weight of the catalyst and the magnesium constituting between 0.5% and 10% by weight of the catalyst.
References Cited (Backward Citations)
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