Patent US4259537A successfully refreshed from Google Patents.
US4259537A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Shape selective reactions with group via modified zeolite catalysts
Assignee: Mobil Oil AS
•
Filing: 1980-03-17
•
Granted: 1981-03-31
•
Expires: 2000-03-17
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 the Group VIA metals (Cr, Mo, W), and optionally phosphorus, to deposit a minor proportion of such elements on the zeolite.
Inventors
- 👤 Chin-Chiun Chu
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 15:06
CPC Classifications
C; C07; C07C; C07C6/00; C07C6/08; C07C6/12; C07C6/126; B; B01; B01J; B01J29/00; B01J29/04; B01J29/06; B01J29/40; B01J29/48; C07C2/00; C07C2/54; C07C2/64; C07C2/66; C07C2/86; C07C2/862; C07C2/864; C07C6/123; C07C2529/00; C07C2529/04; C07C2529/06; C07C2529/40; C07C2529/65; C07C2529/70
Claims Analysis
Total Claims: 27
Claim 1
Independent Claim
109 words
A process for conversion of organic compounds, said process comprising contacting said organic 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 compounds containing one or more of the elements comprising the Group VIA metals, to deposit thereon at least 0.25 weight percent of such element.
Claim 2
Dependent Claim
109 words
A process for conversion of organic compounds, said process comprising contacting said organic 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 compounds containing one or more of the elements comprising the Group VIA metals, 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
19 words
The process of claim 1 wherein said element is chosen from the group consisting of chromium, molybdenum and tungsten.
Claim 5
Dependent Claim
10 words
The process of claim 1 wherein said element is chromium.
Claim 6
Dependent Claim
20 words
The process of claim 4 wherein said chromium comprises between 1 and 20 weight percent of the modified zeolite catalyst.
Claim 7
Dependent Claim
10 words
The process of claim 1 wherein said element is molybdenum.
Claim 8
Dependent Claim
20 words
The process of claim 6 wherein said molybdenum comprises between 1 and 30 weight percent of the modified zeolite catalyst.
Claim 9
Dependent Claim
10 words
The process of claim 1 wherein said element is tungsten.
Claim 10
Dependent Claim
20 words
The process of claim 8 wherein said tungsten comprises between 2 and 30 weight percent of the modified zeolite catalyst.
Claim 11
Dependent Claim
32 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 the phosphorus.
Claim 12
Dependent Claim
15 words
The process of claim 10 wherein said zeolite has deposited thereon both phosphorus and chromium.
Claim 13
Dependent Claim
15 words
The process of claim 10 wherein said zeolite has deposited thereon both phosphorus and molybdenum.
Claim 14
Dependent Claim
15 words
The process of claim 10 wherein said zeolite has deposited thereon both phosphorus and tungsten.
Claim 15
Dependent Claim
14 words
The process of claim 1 wherein said zeolite is admixed with a binder therefor.
Claim 16
Dependent Claim
54 words
The process of claim 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13 or 14 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 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
10 words
The process of claim 15 wherein said zeolite is ZSM-12.
Claim 20
Dependent Claim
45 words
The process of claim 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13 or 14 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 21
Dependent Claim
23 words
The process of claim 19 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 22
Dependent Claim
10 words
The process of claim 19 wherein said zeolite is ZSM-5.
Claim 23
Dependent Claim
10 words
The process of claim 19 wherein said zeolite is ZSM-12.
Claim 24
Dependent Claim
46 words
The process of claim 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13 or 14 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 25
Dependent Claim
23 words
The process of claim 23 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 26
Dependent Claim
10 words
The process of claim 23 wherein said zeolite is ZSM-5.
Claim 27
Dependent Claim
10 words
The process of claim 23 wherein said zeolite is ZSM-12.
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) | 1984-03-30 | 1984-09-29 | 1985-03-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-03-30 | 1988-09-29 | 1989-03-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-03-30 | 1992-09-29 | 1993-03-31 | $7700.00 | Window Closed / Lapsed |