US4393262A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of isopropylbenzene
Assignee: Mobil Oil AS
•
Filing: 1978-12-14
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Granted: 1983-07-12
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Expires: 1998-12-14
Abstract
Abstract A process is disclosed whereby benzene is brought into contact with propylene, in the presence of a specified type of crystalline zeolite catalyst, to produce isopropylbenzene. The preferred zeolite catalysts are those having a silica to alumina ratio of at least about 12 and a constraint index, as herein defined, within the approximate range of 1-12. The process may be carried out in the liquid or the vapor phase at temperatures of from about 100 DEG C. to about 300 DEG C. and pressures ranging from 105 N/m2 to 6x106 N/m2.
Inventors
- 👤 Warren W. Kaeding
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 14:37
CPC Classifications
C; C07; C07C; C07C2/00; C07C2/54; C07C2/64; C07C2/66; C07C2529/00; C07C2529/04; C07C2529/06; C07C2529/70; Y; Y02; Y02P; Y02P20/00; Y02P20/50; Y02P20/52
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
85 words
A process for the propylation of benzene with selective production of isopropylbenzene, said process comprising contacting mixtures of benzene and propylene with a crystalline zeolite catalyst at a temperature of between about 100° C. and the critical temperature, and a pressure of between about 10 5 N/m 2 and 6×10 6 N/m 2 , said zeolite being characterized by a silica/alumina mole ratio of at least about 12 and a constraint index within the approximate range of 1 to 12, said zeolite being 2 sm-12.
Claim 2
Dependent Claim
85 words
A process for the propylation of benzene with selective production of isopropylbenzene, said process comprising contacting mixtures of benzene and propylene with a crystalline zeolite catalyst at a temperature of between about 100° C. and the critical temperature, and a pressure of between about 10 5 N/m 2 and 6×10 6 N/m 2 , said zeolite being characterized by a silica/alumina mole ratio of at least about 12 and a constraint index within the approximate range of 1 to 12, said zeolite being 2 sm-12.
Claim 3
Dependent Claim
22 words
The process of claim 1 wherein the molar ratio of benzene to propylene is within the approximate range of 12 to 1.
Claim 4
Dependent Claim
27 words
The process of claim 1 wherein contact between said benzene/propylene mixture and said zeolite is at a temperature of between about 150° C. and about 250° C.
Claim 5
Dependent Claim
32 words
The process of claim 1 wherein said benzene/propylene mixture is contacted with said zeolite catalyst as a continuous stream at a weight hourly space velocity of from about 0.05 to about 100.
Claim 6
Dependent Claim
18 words
The process of claim 4 wherein said weight hourly space velocity is between about 5 and about 40.
Claim 7
Dependent Claim
14 words
The process of claim 1 wherein said benzene/propylene mixture is in the vapor phase.
Claim 8
Dependent Claim
14 words
The process of claim 1 wherein said benzene/propylene mixture is in the liquid phase.
Claim 9
Dependent Claim
18 words
The process of claim 1 wherein said propylene feed contains a substantial amount of propane in admixture therewith.
Claim 10
Dependent Claim
14 words
The process of claim 1 wherein said zeolite is combined with a binder therefor.
Claim 11
Dependent Claim
29 words
The process of claim 1 wherein dialkylbenzene, trialkylbenzene and n-propylbenzene are byproducts of said selective propylation reaction, said byproducts being recycled over said catalyst to effect transalkylation to isopropylbenzene.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-07-11 | 1987-01-10 | 1987-07-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-07-11 | 1991-01-10 | 1991-07-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-07-11 | 1995-01-10 | 1995-07-12 | $7700.00 | Window Closed / Lapsed |