US4391998A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of para-isopropylphenol
Assignee: Mobil Oil AS
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Filing: 1981-10-21
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Granted: 1983-07-05
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Expires: 2001-10-21
Abstract
Abstract Phenol is catalytically alkylated with an isopropanol or propylene alkylating agent to form high yields of an isopropylphenol product enriched in the para-isomer of isopropylphenol. Such an alkylation process is carried out under catalytic alkylation conditions including a temperature of from about 200 DEG C. to 300 DEG C. and contact with a crystalline zeolite catalyst having a silica to alumina molar ratio of at least about 12 and a constraint index of about 1 to 12.
Inventors
- 👤 Margaret M. Wu
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 15:28
CPC Classifications
C; C07; C07C; C07C37/00; C07C37/11; C07C37/14; C07C37/16
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
74 words
A process for selectively alkylating phenol to provide a high yield of an isopropylphenol product enriched in the para-isopropyl isomer of isopropylphenol, said process comprising contacting phenol with a propylating agent selected from propylene and isopropanol in the presence of a zeolite catalyst selected from the group consisting of ZSM-5, ZSM-11, ZSM-23, ZSM-35, ZSM-38 and ZSM-48, under alkylation conditions which include a temperature within the range of from about 200° C. to 300° C.
Claim 2
Dependent Claim
74 words
A process for selectively alkylating phenol to provide a high yield of an isopropylphenol product enriched in the para-isopropyl isomer of isopropylphenol, said process comprising contacting phenol with a propylating agent selected from propylene and isopropanol in the presence of a zeolite catalyst selected from the group consisting of ZSM-5, ZSM-11, ZSM-23, ZSM-35, ZSM-38 and ZSM-48, under alkylation conditions which include a temperature within the range of from about 200° C. to 300° C.
Claim 3
Dependent Claim
64 words
A process for selectively alkylating phenol to provide a high yield of an isopropylphenol product enriched in the para-isopropyl isomer of isopropylphenol, said process comprising contacting phenol with a propylating agent selected from propylene and isopropanol in the presence of a zeolite catalyst which is ZSM-5, under alkylation conditions which include a temperature within the range of from about 200° C. to 300° C.
Claim 4
Dependent Claim
64 words
A process for selectively alkylating phenol to provide a high yield of an isopropylphenol product enriched in the para-isopropyl isomer of isopropylphenol, said process comprising contacting phenol with a propylating agent selected from propylene and isopropanol in the presence of a zeolite catalyst which is ZSM-5, under alkylation conditions which include a temperature within the range of from about 200° C. to 300° C.
Claim 5
Dependent Claim
35 words
A process according to claim 2 wherein the alkylation conditions further include pressure of from about 10 5 to 6×10 6 N/m 2 and a weight hourly space velocity of from about 0.5 to 100.
Claim 6
Dependent Claim
21 words
A process according to claim 3 wherein the molar ratio of phenol to alkylating agent ranges from about 0.5:1 to 20:1.
Claim 7
Dependent Claim
33 words
A process according to claim 4 wherein phenol and alkylating agent are contacted with catalyst in the presence of an inert diluent comprising up to about 50% by weight of the reaction mixture.
Claim 8
Dependent Claim
15 words
A process according to claim 4 wherein the zeolite is combined with a binder therefor.
Claim 9
Dependent Claim
100 words
A process for selectively alkylating phenol to provide a high yield of an isopropylphenol product enriched in the para-isopropyl isomer of isopropylphenol, said process comprising contacting phenol with a propylating agent selected from propylene and isopropanol in the presence of a ZSM-5 zeolite catalyst, under alkylation conditions which include a temperature of from about 250° C. to 300° C., a pressure of from about 10 5 to 6×10 6 N/m 2 , a weight hourly space velocity of reactants of from about 0.5 to 100 and a molar ratio of phenol to alkylating agent of from about 0.5:1 to 20:1.
Claim 10
Dependent Claim
100 words
A process for selectively alkylating phenol to provide a high yield of an isopropylphenol product enriched in the para-isopropyl isomer of isopropylphenol, said process comprising contacting phenol with a propylating agent selected from propylene and isopropanol in the presence of a ZSM-5 zeolite catalyst, under alkylation conditions which include a temperature of from about 250° C. to 300° C., a pressure of from about 10 5 to 6×10 6 N/m 2 , a weight hourly space velocity of reactants of from about 0.5 to 100 and a molar ratio of phenol to alkylating agent of from about 0.5:1 to 20:1.
Claim 11
Dependent Claim
19 words
A process according to claim 1, 2, 3, 4, 5, 6 or 7 wherein the alkylating agent is isopropanol.
Claim 12
Dependent Claim
19 words
A process according to claim, 1, 2, 3, 4, 5, 6 or 7 wherein the alkylating agent is propylene.
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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) | 1986-07-04 | 1987-01-03 | 1987-07-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-07-04 | 1991-01-03 | 1991-07-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-07-04 | 1995-01-03 | 1995-07-05 | $7700.00 | Window Closed / Lapsed |