US4262145A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Novel etherification process
Assignee: Chevron USA Inc
•
Filing: 1979-12-10
•
Granted: 1981-04-14
•
Expires: 1999-12-10
Abstract
Abstract A process for converting an olefin, or a mixture of olefins, to an ether, or a mixture of ethers, which comprises reacting said olefin, or said mixture of olefins, with an alkanol in contact with silicatungstic acid.
Inventors
- 👤 Charles M. Selwitz
- 👤 John G. McNulty
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 10:35
CPC Classifications
C; C07; C07C; C07C41/00; C07C41/01; C07C41/05; C07C41/06
Claims Analysis
Total Claims: 24
Claim 1
Independent Claim
182 words
A process for converting an olefin, or mixture of olefins, to an ether, or a mixture of ethers, said olefin being a branched olefin or a diolefin defined by the following structure: ##STR3## wherein R 1 is hydrogen, alkyl or alkenyl; but when R 1 is alkenyl R 2 and R 3 are hydrogen or alkyl; and when R 1 is hydrogen or alkyl, R 2 and R 3 are alkyls; said alkyls and alkenyls having from one to 12 carbon atoms, which comprises reacting in batch form in liquid phase said olefins, or mixtures of olefins, with an alkanol, or mixtures of alkanols, selected from the group consisting of methanol, ethanol, normal propanol and isopropanol, in a molar ratio of alkanol to olefin from about 1:1 to about 15:1, in contact with silicatungstic acid, with the weight of catalyst per weight of reaction solution being about 1:100 to about 1:1, at a temperature of about 50° to about 200° C. and a pressure of about 0.1 to about 10 atmospheres for about one minute to about 12 hours or even longer.
Claim 2
Dependent Claim
182 words
A process for converting an olefin, or mixture of olefins, to an ether, or a mixture of ethers, said olefin being a branched olefin or a diolefin defined by the following structure: ##STR3## wherein R 1 is hydrogen, alkyl or alkenyl; but when R 1 is alkenyl R 2 and R 3 are hydrogen or alkyl; and when R 1 is hydrogen or alkyl, R 2 and R 3 are alkyls; said alkyls and alkenyls having from one to 12 carbon atoms, which comprises reacting in batch form in liquid phase said olefins, or mixtures of olefins, with an alkanol, or mixtures of alkanols, selected from the group consisting of methanol, ethanol, normal propanol and isopropanol, in a molar ratio of alkanol to olefin from about 1:1 to about 15:1, in contact with silicatungstic acid, with the weight of catalyst per weight of reaction solution being about 1:100 to about 1:1, at a temperature of about 50° to about 200° C. and a pressure of about 0.1 to about 10 atmospheres for about one minute to about 12 hours or even longer.
Claim 3
Dependent Claim
15 words
The process of claim 1 wherein said olefin has from four to 14 carbon atoms.
Claim 4
Dependent Claim
15 words
The process of claim 1 wherein said olefin has from four to 10 carbon atoms.
Claim 5
Dependent Claim
18 words
The process of claim 1 wherein said alkyls and said alkenyls have from one to eight carbon atoms.
Claim 6
Dependent Claim
10 words
The process of claim 1 wherein R 1 is hydrogen.
Claim 7
Dependent Claim
11 words
The process of claim 1 wherein R 1 is an alkyl.
Claim 8
Dependent Claim
11 words
The process of claim 1 wherein R 1 is an alkenyl.
Claim 9
Dependent Claim
13 words
The process of claim 1 wherein R 2 and R 3 are hydrogen.
Claim 10
Dependent Claim
13 words
The process of claim 1 wherein R 2 and R 3 are alkyls.
Claim 11
Dependent Claim
12 words
The process of claim 1 wherein said olefin is a branched olefin.
Claim 12
Dependent Claim
11 words
The process of claim 1 wherein said olefin is a diolefin.
Claim 13
Dependent Claim
10 words
The process of claim 1 wherein said alkanol is methanol.
Claim 14
Dependent Claim
10 words
The process of claim 1 wherein said alkanol is ethanol.
Claim 15
Dependent Claim
11 words
The process of claim 1 wherein said alkanol is normal propanol.
Claim 16
Dependent Claim
10 words
The process of claim 1 wherein said alkanol is isopropanol.
Claim 17
Dependent Claim
20 words
The process of claim 1 wherein the molar ratio of alkanol to olefin is from about 2:1 to about 5:1.
Claim 18
Dependent Claim
21 words
The process of claim 1 wherein the weight of catalyst per weight of reaction solution is about 1:4 to about 1:40.
Claim 19
Dependent Claim
16 words
The process of claim 1 wherein the reaction temperature is about 80° to about 120° C.
Claim 20
Dependent Claim
11 words
The process of claim 1 wherein the pressure is about atmospheric.
Claim 21
Dependent Claim
16 words
The process of claim 1 wherein the reaction time is about one-half to about four hours.
Claim 22
Dependent Claim
17 words
The process of claim 1 wherein said silicatungstic acid has the formula: SiO 2 .12WO 3 .
Claim 23
Dependent Claim
27 words
The process of claim 1 wherein said silicatungstic acid is deposited on silica in an acid to silica weight ratio of about five to about 100 percent.
Claim 24
Dependent Claim
27 words
The process of claim 1 wherein said silicatungstic acid is deposited on silica in an acid to silica weight ratio of about 30 to about 100 percent.
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) | 1984-04-13 | 1984-10-13 | 1985-04-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-04-13 | 1988-10-13 | 1989-04-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-04-13 | 1992-10-13 | 1993-04-14 | $7700.00 | Window Closed / Lapsed |