US4387259A
Expired / Lapsed
US
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Selective alkylation of aromatic hydrocarbons using a mixed ethylene/propylene alkylation agent
Assignee: Mobil Oil AS
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Filing: 1981-07-16
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Granted: 1983-06-07
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Expires: 2001-07-16
Abstract
Abstract Aromatic hydrocarbons are selectively alkylated using an alkylating mixture containing both ethylene and propylene. By employing a zeolite ZSM-12 based alkylation catalyst, essentially only the propylene from the olefin-containing alkylation mixture will react with the aromatic hydrocarbon to thereby form both an alkylaromatic product enriched in propylated alkylaromatic and a propylene-free residual olefin-containing mixture enriched in the unreacted ethylene.
Inventors
- 👤 George C. Barile
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 07:23
CPC Classifications
C; C07; C07C; C07C2/00; C07C2/54; C07C2/64; C07C2/66; C07C2529/00; C07C2529/04; C07C2529/06; C07C2529/70
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
99 words
A process for selectively alkylating benzene with an olefin-containing alkylation mixture comprising ethylene and propylene, said process comprising contacting benzene with an alkylation mixture comprising from about 5 to 95 mole % ethylene, and from about 5 to 95 mole % propylene, in the presence of a ZSM-12 based alkylation catalyst composition under alkylation conditions, to thereby produce an alkylbenzene product enriched in propylated benzene to the extent of at least 98% selectivity based on moles of propylated benzene per mole of propylated benzene plus ethylated benzene, and an olefin-containing product enriched in ethylene and free of reactive propylene.
Claim 2
Dependent Claim
99 words
A process for selectively alkylating benzene with an olefin-containing alkylation mixture comprising ethylene and propylene, said process comprising contacting benzene with an alkylation mixture comprising from about 5 to 95 mole % ethylene, and from about 5 to 95 mole % propylene, in the presence of a ZSM-12 based alkylation catalyst composition under alkylation conditions, to thereby produce an alkylbenzene product enriched in propylated benzene to the extent of at least 98% selectivity based on moles of propylated benzene per mole of propylated benzene plus ethylated benzene, and an olefin-containing product enriched in ethylene and free of reactive propylene.
Claim 3
Dependent Claim
46 words
A process according to claim 1 wherein said alkylation conditions include a temperature of from about 150° to 300° C., a pressure of from about 10 5 to 6×10 6 N/m 2 and a feed weight hourly space velocity of between about 0.5 and about 100.
Claim 4
Dependent Claim
30 words
A process according to claim 2 wherein the molar ratio of benzene to the total olefin in the alkylation mixture is within the range of from about 12:1 to 1:1.
Claim 5
Dependent Claim
32 words
A process according to claim 3 wherein the alkylation mixture comprises from about 10 mol % to 90 mol % ethylene and from about 10 mol % to 90 mol % propylene.
Claim 6
Dependent Claim
36 words
A process according to claim 4 wherein the zeolite in said ZSM-12-based alkylation catalyst composition has a silica/alumina mole ratio of at least about 90:1 and a crystal size of from about 0.02 to 0.5 micron.
Claim 7
Dependent Claim
21 words
A process according to claim 5 wherein said zeolite ZSM-12 is combined with a binder therefor to form said catalyst composition.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-06-06 | 1986-12-06 | 1987-06-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-06-06 | 1990-12-06 | 1991-06-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-06-06 | 1994-12-06 | 1995-06-07 | $7700.00 | Window Closed / Lapsed |