US4275256A
Expired / Lapsed
US
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Shape selective reactions with group VIIA metal modified zeolite catalysts
Assignee: Mobil Oil AS
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Filing: 1980-02-25
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Granted: 1981-06-23
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Expires: 2000-02-25
Abstract
Abstract A process for the conversion of aromatic compounds to dialkylbenzene compounds rich in the 1,4-dialkylbenzene isomer. The reaction is carried out in the presence of a particular type of zeolite catalyst having a silica to alumina mole ratio of at least 12 and a constraint index of about 1-12, said catalyst having been modified by treatment with compounds of manganese and/or rhenium, and optionally phosphorus, to deposit a minor proportion of such elements on the zeolite.
Inventors
- 👤 Chin-Chiun Chu
- 👤 Warren W. Kaeding
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 09:10
CPC Classifications
C; C07; C07C; C07C2/00; C07C2/86; C07C2/862; C07C2/864; B; B01; B01J; B01J29/00; B01J29/04; B01J29/06; B01J29/40; B01J29/48; C07C2/54; C07C2/64; C07C2/66; C07C6/00; C07C6/08; C07C6/12; C07C6/123; C07C6/126; B01J2229/00; B01J2229/10; B01J2229/26; B01J2229/30; B01J2229/42; C07C2529/00; C07C2529/04; C07C2529/06; C07C2529/40; C07C2529/65; C07C2529/70; Y; Y02; Y02P; Y02P20/00; Y02P20/50; Y02P20/52
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
108 words
A process for conversion of aromatic hydrocarbon compounds, said process comprising contacting said aromatic hydrocarbon compounds with a crystalline zeolite catalyst at a temperature of between about 250° C. and about 750° C. and a pressure within the approximate range of 10 5 N/m 2 to 10 7 N/m 2 , said zeolite being characterized by a silica to alumina mole ratio of at least 12 and a constraint index within the approximate range of 1 to 12, said zeolite having undergone prior modification by treatment with one or more compounds containing elements of Group VII A to deposit thereon at least 0.25 weight percent of such element.
Claim 2
Dependent Claim
108 words
A process for conversion of aromatic hydrocarbon compounds, said process comprising contacting said aromatic hydrocarbon compounds with a crystalline zeolite catalyst at a temperature of between about 250° C. and about 750° C. and a pressure within the approximate range of 10 5 N/m 2 to 10 7 N/m 2 , said zeolite being characterized by a silica to alumina mole ratio of at least 12 and a constraint index within the approximate range of 1 to 12, said zeolite having undergone prior modification by treatment with one or more compounds containing elements of Group VII A to deposit thereon at least 0.25 weight percent of such element.
Claim 3
Dependent Claim
15 words
The process of claim 1 wherein said temperature is between 300° C. and 650° C.
Claim 4
Dependent Claim
22 words
The process of claim 1 wherein said element of Group VII A is chosen from the group consisting of manganese and rhenium.
Claim 5
Dependent Claim
10 words
The process of claim 1 wherein said element is manganese.
Claim 6
Dependent Claim
20 words
The process of claim 4 wherein said manganese comprises between 1 and 15 weight percent of the modified zeolite catalyst.
Claim 7
Dependent Claim
10 words
The process of claim 1 wherein said element is rhenium.
Claim 8
Dependent Claim
20 words
The process of claim 6 wherein said rhenium comprises between 1 and 25 weight percent of the modified zeolite catalyst.
Claim 9
Dependent Claim
31 words
The process of claim 1 wherein said zeolite is also modified by treatment thereof with a compound of the element phosphorus to deposit thereon at least 0.25 weight percent of phosphorus.
Claim 10
Dependent Claim
15 words
The process of claim 1 wherein said zeolite has deposited thereon both phosphorus and manganese.
Claim 11
Dependent Claim
15 words
The process of claim 1 wherein said zeolite has deposited thereon both phosphorus and rhenium.
Claim 12
Dependent Claim
14 words
The process of claim 1 wherein said zeolite is admixed with a binder therefor.
Claim 13
Dependent Claim
51 words
The process of claim 1, 2, 3, 4, 5, 6, 7, 8, 9, 10 or 11 wherein said conversion comprises the alkylation of an aromatic compound by contacting said compound with an alkylating agent to produce dialkylbenzene compounds wherein the 1,4-dialkylbenzene isomer is present in excess of its normal equilibrium concentration.
Claim 14
Dependent Claim
23 words
The process of claim 12 wherein said zeolite is chosen from the group consisting of ZSM-5, ZSM-11, ZSM-12, ZSM-23, ZSM-35, ZSM-38 and ZSM-48.
Claim 15
Dependent Claim
10 words
The process of claim 12 wherein said zeolite is ZSM-5.
Claim 16
Dependent Claim
42 words
The process of claim 1, 2, 3, 4, 5, 6, 7, 8, 9, 10 or 11 wherein said conversion comprises the transalkylation of aromatic compounds to produce dialkylbenzene compounds wherein the 1,4-dialkylbenzene isomer is present in excess of its normal equilibrium concentration.
Claim 17
Dependent Claim
23 words
The process of claim 15 wherein said zeolite is chosen from the group consisting of ZSM-5, ZSM-11, ZSM-12, ZSM-23, ZSM-35, ZSM-38 and ZSM-48.
Claim 18
Dependent Claim
10 words
The process of claim 15 wherein said zeolite is ZSM-5.
Claim 19
Dependent Claim
43 words
The process of claim 1, 2, 3, 4, 5, 6, 7, 8, 9, 10 or 11 wherein said conversion comprises disproportionation of alkylbenzenes to produce benzene and dialkylbenzenes in which the proportion of 1,4-dialkylbenzene isomer is in excess of its normal equilibrium concentration.
Claim 20
Dependent Claim
22 words
The process of claim 18 wherein said zeolite is chosen from the group consisting of ZSM-5, ZSM-11, ZSM-12, ZSM-23, ZSM-35, ZSM-38, ZSM-48.
Claim 21
Dependent Claim
10 words
The process of claim 18 wherein said zeolite is ZSM-5.
References Cited (Backward Citations)
US4002697A
Cited
US3972832A
Cited
US3965208A
Cited
US3979472A
Cited
US4052476A
Cited
US4034053A
Cited
US4067920A
Cited
US4117026A
Cited
US4137195A
Cited
US4101597A
Cited
US4128592A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-06-22 | 1984-12-22 | 1985-06-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-06-22 | 1988-12-22 | 1989-06-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-06-22 | 1992-12-22 | 1993-06-23 | $7700.00 | Window Closed / Lapsed |