Patent US4556750A successfully refreshed from Google Patents.
US4556750A
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Alkylation process
Assignee: Phillips Petroleum Co
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Filing: 1985-04-12
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Granted: 1985-12-03
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Expires: 2005-04-12
Abstract
Abstract In an alkylation process a portion of the alkylating olefin is added to benzene before heating the benzene up to the alkylation reaction temperature.
Inventors
- 👤 R. Lynn Cobb
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 20:28
CPC Classifications
C; C07; C07C; C07C2/00; C07C2/54; C07C2/64; C07C2/66; C07C2/68; C07C2/70; C07C2521/00; C07C2521/16; C07C2527/00; C07C2527/06; C07C2527/08; C07C2527/12; C07C2527/1213; C07C2527/14; C07C2527/16; C07C2527/167; C07C2527/173; C07C2531/00; C07C2531/02
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
76 words
A process for the dialkylation of benzene with isobutylene which comprises: (a) adding to said benzene and an alkylation catalyst about 10 to about 50 volume percent of the total amount of isobutylene to be used in the alkylation process; (b) heating the mixture produced in step (a) up to an alkylation reaction temperature; and (c) adding the remainder of the isobutylene to be used in the alkylation process to said heated mixture to produce ditertiary-butylbenzene.
Claim 2
Dependent Claim
76 words
A process for the dialkylation of benzene with isobutylene which comprises: (a) adding to said benzene and an alkylation catalyst about 10 to about 50 volume percent of the total amount of isobutylene to be used in the alkylation process; (b) heating the mixture produced in step (a) up to an alkylation reaction temperature; and (c) adding the remainder of the isobutylene to be used in the alkylation process to said heated mixture to produce ditertiary-butylbenzene.
Claim 3
Dependent Claim
40 words
A process in accordance with claim 1 wherein about 15 to about 35 volume percent of the total amount of isobutylene to be used in the alkylation process is added to said benzene and said alkylation catalyst in step (a).
Claim 4
Dependent Claim
21 words
A process in accordance with claim 1 wherein said alkylation reaction temperature is in the range of about 50° C.-250° C.
Claim 5
Dependent Claim
21 words
A process in accordance with claim 3 wherein said alkylation reaction temperature is in the range of about 130° C.-190° C.
Claim 6
Dependent Claim
31 words
A process in accordance with claim 3 wherein said alkylation catalyst is selected from the group consisting of: acid-treated montmorillonite, boron trifluoride, boron trifluoride: phosphoric acid complex, and boron trifluoride: etherate.
Claim 7
Dependent Claim
14 words
A process in accordance with claim 4 wherein said alkylation catalyst is acid-treated montmorillonite.
Claim 8
Dependent Claim
11 words
A process in accordance with claim 4 wherein 1,4-ditertiary-butylbenzene is produced.
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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) | 1988-12-02 | 1989-06-03 | 1989-12-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-12-02 | 1993-06-03 | 1993-12-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-12-02 | 1997-06-03 | 1997-12-03 | $7700.00 | Window Closed / Lapsed |