Patent US3596927A successfully refreshed from Google Patents.
US3596927A
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US
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Production of 4-methylpentene-1
Assignee: ExxonMobil Technology and Engineering Co
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Filing: 1969-10-10
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Granted: 1971-08-03
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Expires: 1989-10-10
Abstract
Abstract The production of 4-methylpentene-1 in increased yields is accomplished by the short-time (e.g., 0.1 to 10 seconds) contacting of 4-methylpentene-2 at elevated temperatures (e.g., 600 to 1200* F.) with a suitable isomerization catalyst (e.g., 0.5 to 1.5 percent KOH on alcoholate alumina). Yields as high as seven times greater than thermodynamic equilibrium amounts of 4methylpentene-1 have been obtained.
Inventors
- 👤 Willard N Mitchell
- 👤 Armand M Souby
- 👤 Arthur B Simmons
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 18:04
CPC Classifications
B; B01; B01J; B01J23/00; B01J23/02; B01J23/04; C; C07; C07C; C07C5/00; C07C5/22; C07C5/23; C07C5/25; C07C5/2506; C07C5/2512
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
16 words
A process in accordance with claim 1 wherein the catalyst is potassium hydroxide on alcoholate alumina.
Claim 2
Dependent Claim
30 words
A process in accordance with claim 2 wherein the catalyst contains from 0.5 weight percent to 1.5 weight percent of potassium hydroxide, based on the weight of the alcoholate alumina.
Claim 3
Dependent Claim
69 words
A process for isomerizing 4-methylpentene-2 to obtain 4-methylpentene-1 which comprises: contacting a feed consisting essentially of 4-methylpentene-2 in the vapor phase with a catalyst comprising an alkali metal hydroxide supported on alcoholate alumina, under isomerization conditions including a temperature from 800* to 950* F., a pressure from 0.1 to 10 atm., and a residence time from 0.1 to 10 seconds, and separating the resulting 4-methylpentene-1 from the reaction products.
Claim 4
Dependent Claim
16 words
A process in accordance with claim 4 wherein the catalyst is potassium hydroxide on alcoholate alumina.
Claim 5
Dependent Claim
19 words
A process in accordance with claim 4 wherein the catalyst is 1.5 weight percent potassium hydroxide on alcoholate alumina.
Claim 6
Dependent Claim
19 words
A process in accordance with claim 6 wherein the residence time is from about 3 to about 5 seconds.
Claim 7
Dependent Claim
25 words
A process in accordance with claim 7 wherein the isomerizing conditions are a temperature of 800* to 850* F. and a pressure of about atmospheric.
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) | 1974-08-02 | 1975-02-01 | 1975-08-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-08-02 | 1979-02-01 | 1979-08-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-08-02 | 1983-02-01 | 1983-08-03 | $7700.00 | Window Closed / Lapsed |