Patent US5619906A successfully refreshed from Google Patents.
Patent US4357147A successfully refreshed from Google Patents.
US4357147A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Diisopropyl ether reversion and oligomerization in isopropanol production
Assignee: Chevron USA Inc
•
Filing: 1981-10-30
•
Granted: 1982-11-02
•
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 14:55
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.
References Cited (Backward Citations)
US2519061A
Cited
US2827500A
Cited
US2813908A
Cited
US2870217A
Cited
US2818439A
Cited
US3170000A
Cited
US3455664A
Cited
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 |