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Patent US3457320A successfully refreshed from Google Patents.
US3457320A
Expired / Lapsed
US
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Production of 3-methyl-1-butene
Assignee: Phillips Petroleum Co
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Filing: 1966-09-19
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Granted: 1969-07-22
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Expires: 1986-09-19
Abstract
No abstract record available.
Inventors
- 👤 Paul R Stapp
- 👤 Donald L Crain
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 18:07
CPC Classifications
C; C07; C07C; C07C11/00; C07C11/02; C07C11/10; C07C11/107; C07C11/113; C08; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/40; C08G18/48; C08G18/50; C08G18/5021; C08G18/5033; Y; Y02; Y02P; Y02P20/00; Y02P20/50; Y02P20/582
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
91 words
A METHOD OF PRODUCING 4-METHYL-1-PENTENE AND 3METHYL-1-BUTENE FROM PROPYLENE AND ETHYLENE WHICH COMPRISES: (A) CONTACTING SAID PROPYLENE WITH AN OLEFIN DIMERIZATION CATALYST AT DIMERIZATION CONDITIONS TO DIMERIZE AT LEAST A PART OF SAID PROPYLENE TO PRODUCE A MIXTURE COMPRISING 4-METHYL-1-PENTENE AND 4-METHYL-2-PENTENE; (B) RECOVERING SAID 4-METHYL-1-PENTENE FROM SAID MIXTURE AS PRODUCT; AND (C) CONTACTING SAID 4-METHYL-2-PENTENE WITH ETHYLENE IN THE PRESENCE OF AN OLEFIN DISPROPORTIONATION CATALYST AT CONDITIONS SUFFICIENT TO PROMOTE CONVERSION OF THE 4-METHYL-2-PENTENE TO CONVERT AT LEAST A PART OF SAID 4-METHYL-2-PENTENE TO A MIXTURE OF 3-METHYL1-BUTENE AND PROPYLENE.
Claim 2
Independent Claim
91 words
A METHOD OF PRODUCING 4-METHYL-1-PENTENE AND 3METHYL-1-BUTENE FROM PROPYLENE AND ETHYLENE WHICH COMPRISES: (A) CONTACTING SAID PROPYLENE WITH AN OLEFIN DIMERIZATION CATALYST AT DIMERIZATION CONDITIONS TO DIMERIZE AT LEAST A PART OF SAID PROPYLENE TO PRODUCE A MIXTURE COMPRISING 4-METHYL-1-PENTENE AND 4-METHYL-2-PENTENE; (B) RECOVERING SAID 4-METHYL-1-PENTENE FROM SAID MIXTURE AS PRODUCT; AND (C) CONTACTING SAID 4-METHYL-2-PENTENE WITH ETHYLENE IN THE PRESENCE OF AN OLEFIN DISPROPORTIONATION CATALYST AT CONDITIONS SUFFICIENT TO PROMOTE CONVERSION OF THE 4-METHYL-2-PENTENE TO CONVERT AT LEAST A PART OF SAID 4-METHYL-2-PENTENE TO A MIXTURE OF 3-METHYL1-BUTENE AND PROPYLENE.
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) | 1972-07-21 | 1973-01-20 | 1973-07-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-07-21 | 1977-01-20 | 1977-07-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-07-21 | 1981-01-20 | 1981-07-22 | $7700.00 | Window Closed / Lapsed |