US3920765A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Inhibition of polymerization during the isomerization of olefins
Assignee: Goodyear Tire and Rubber Co
•
Filing: 1973-11-12
•
Granted: 1975-11-18
•
Expires: 1993-11-12
Abstract
Abstract There is disclosed an improved process for the isomerization of 1-olefins containing tertiary carbon atoms by means of a catalyst comprising sulfonated ion-exchange resins. The improvement comprises the use of very small amounts of water or water producing materials to inhibit the polymerization of the feed stock by the catalyst.
Inventors
- 👤 Kenneth J Frech
- 👤 Roger W Spoerke
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 22:55
CPC Classifications
C; C07; C07C; C07C5/00; C07C5/22; C07C5/23; C07C5/25; C07C5/2506; C07C5/2562; C07C5/2568; C07C5/2206; C07C5/2266; C07C5/2273; C07C2531/00; C07C2531/02; C07C2531/06; C07C2531/08; C07C2531/10; Y; Y10; Y10S; Y10S585/00; Y10S585/949; Y10S585/952
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
78 words
IN A PROCESS FOR ISOMERIZATION WHICH COMPRISES SUBJECTING OLEFINS SELECTED FROM THE GROUP CONSISTING OF 2,3-DIMETHYL-LBUTENE, 2-METHYL-1-PENTENE, 2-ETHYL-1-BUTENE, AND 2-METHYL1-BUTENE TO A CATALYST CONSISTING OF MACROETICULAR SULFONATED, ION-EXCHANGE RESINS, SAID ISOMERIZATION BEING CONDUCTED IN THE LIQUID PHASE AT A TEMPERATURE BETWEEN 5*C AND 80*C AND AT LIQUID HOUR SPACE VELOCITIES BETWEEN ABOUT 0.5 AND ABOUT 40, THE IMPROVEMENT COMPRISING ADDING TO SAID ISOMERIZATION FROM ABOUT 0.5 TO ABOUT 1 PERCENT BY WEIGHT OF WATER BASED ON SAID OLEFINS.
Claim 2
Dependent Claim
78 words
IN A PROCESS FOR ISOMERIZATION WHICH COMPRISES SUBJECTING OLEFINS SELECTED FROM THE GROUP CONSISTING OF 2,3-DIMETHYL-LBUTENE, 2-METHYL-1-PENTENE, 2-ETHYL-1-BUTENE, AND 2-METHYL1-BUTENE TO A CATALYST CONSISTING OF MACROETICULAR SULFONATED, ION-EXCHANGE RESINS, SAID ISOMERIZATION BEING CONDUCTED IN THE LIQUID PHASE AT A TEMPERATURE BETWEEN 5*C AND 80*C AND AT LIQUID HOUR SPACE VELOCITIES BETWEEN ABOUT 0.5 AND ABOUT 40, THE IMPROVEMENT COMPRISING ADDING TO SAID ISOMERIZATION FROM ABOUT 0.5 TO ABOUT 1 PERCENT BY WEIGHT OF WATER BASED ON SAID OLEFINS.
Claim 3
Dependent Claim
20 words
The process according to claim 1 in which the water is introduced to said isomerization by means of aliphatic alcohols.
Claim 4
Dependent Claim
23 words
The process according to claim 1 in which the sulfonated ion-exchange resin is prepared by copolymerizing styrene and divinyl benzene followed by sulfonation.
Claim 5
Dependent Claim
16 words
The process according to claim 1 in which the 1-olefin subjected to the catalyst is 2,3-dimethyl-1-butene.
Claim 6
Dependent Claim
16 words
The process according to claim 1 in which the 1-olefin subjected to the catalyst is 2-methyl-1-pentene.
Claim 7
Dependent Claim
16 words
The process according to claim 1 in which the 1-olefin subjected to the catalyst is 2-methyl-1-butene.
Claim 8
Dependent Claim
16 words
The process according to claim 1 in which the 1-olefin subjected to the catalyst is 2-ethyl-1-butene.
References Cited (Backward Citations)
US3104269A
Cited
US3037052A
Cited
US3151179A
Cited
US3327000A
Cited
US3370101A
Cited
US3424810A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-11-17 | 1979-05-19 | 1979-11-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-11-17 | 1983-05-19 | 1983-11-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-11-17 | 1987-05-19 | 1987-11-18 | $7700.00 | Window Closed / Lapsed |