US4357147A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Diisopropyl ether reversion and oligomerization in isopropanol production
Assignee: Chevron USA Inc
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Filing: 1981-10-30
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Granted: 1982-11-02
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Expires: 2001-10-30
Abstract
Abstract A process for the production of an oxygenated fuel blending composition which contains isopropanol by the hydration of propylene in which the by-product diisopropyl ether is subjected to a reversion reaction and the resulting propylene is oligomerized to form olefinic gasoline.
Inventors
- 👤 Susan A. Bezman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 14:42
CPC Classifications
C; C10; C10L; C10L1/00; C10L1/02; C10L1/023
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
111 words
A process for producing an oxygenated fuel blending composition comprising: (a) contacting water and a feedstock comprising propylene with a catalyst comprising an acid ion exchange resin in a first reaction zone under hydration conditions to produce a first stream; (b) dividing the first stream into a second stream comprising water and isopropanol and a third stream comprising diisopropyl ether; (c) contacting the third stream with a reversion catalyst in a second reaction zone under reversion conditions to produce a fourth stream; p1 (d) separating propylene from the fourth stream; (e) oligomerizing the propylene; and (f) recovering isopropanol from the second stream and blending it with a gasoline blending hydrocarbon stream.
Claim 2
Dependent Claim
111 words
A process for producing an oxygenated fuel blending composition comprising: (a) contacting water and a feedstock comprising propylene with a catalyst comprising an acid ion exchange resin in a first reaction zone under hydration conditions to produce a first stream; (b) dividing the first stream into a second stream comprising water and isopropanol and a third stream comprising diisopropyl ether; (c) contacting the third stream with a reversion catalyst in a second reaction zone under reversion conditions to produce a fourth stream; p1 (d) separating propylene from the fourth stream; (e) oligomerizing the propylene; and (f) recovering isopropanol from the second stream and blending it with a gasoline blending hydrocarbon stream.
Claim 3
Dependent Claim
53 words
The process of claim 1, wherein the hydration conditions include a temperature of from about 275° to 375° F., a pressure of from about 1,000 to 2,000 psig, a water to propylene molar ratio of from about 5 to 15 and a propylene liquid hourly space velocity of from about 0.15 to 1.5.
Claim 4
Dependent Claim
21 words
The process of claim 1, wherein the feedstock comprises C 3 hydrocarbons of which from about 60 to 85% are propylene.
Claim 5
Dependent Claim
20 words
The process of claim 1, wherein the acid ion exchange resin is a sulfonated macroreticular copolymer of styrene and divinylbenzene.
Claim 6
Dependent Claim
16 words
The process of claim 4, wherein the acid ion exchange resin is in a chlorinated form.
Claim 7
Dependent Claim
13 words
The process of claim 1, wherein the reversion catalyst comprises a silica-alumina cogel.
Claim 8
Dependent Claim
11 words
The process of claim 1, wherein the reversion catalyst comprises alumina.
Claim 9
Dependent Claim
14 words
The process of claim 1, wherein the reversion catalyst comprises a zeolitic crystalline aluminosilicate.
Claim 10
Dependent Claim
18 words
The process of claim 1, wherein the reversion catalyst comprises an essentially alumina free intermediate pore size zeolite.
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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) | 1985-11-01 | 1986-05-03 | 1986-11-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-11-01 | 1990-05-03 | 1990-11-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-11-01 | 1994-05-03 | 1994-11-02 | $7700.00 | Window Closed / Lapsed |