Patent US4175210A successfully refreshed from Google Patents.
US4175210A
Expired / Lapsed
US
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Etherification process
Assignee: Gulf Research and Development Co
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Filing: 1978-06-19
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Granted: 1979-11-20
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Expires: 1998-06-19
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 alcohol in contact with silicatungstic acid.
Inventors
- 👤 Charles M. Selwitz
- 👤 John G. McNulty
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 20:22
CPC Classifications
C; C07; C07C; C07C41/00; C07C41/01; C07C41/05; C07C41/06
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
153 words
A process for converting an unbranched olefin having from about 3 to about 14 carbon atoms or a mixture of unbranched olefins, having an unsaturated hydrocarbon structure: ##STR3## wherein R and R 1 and a hydrogen, a straight chain alkyl group or a straight chain alkenyl group containing from about 1 to about 12 carbon atoms but no more than one of said R and R 1 can be hydrogen, to an ether, or a mixture of ethers, which comprises passing a hydrocarbon alcohol and said olefin, or mixture of olefins, in a molar ratio of about 1:1 to about 15:1 in the vapor phase through a catalyst bed of silicatungstic acid at a liquid hourly space velocity of about 0.02 to about 2 volume of feed per volume of catalyst per hour at a temperature of about 50° to about 200° C. and a pressure of about 0.1 to about 10 atmospheres.
Claim 2
Dependent Claim
153 words
A process for converting an unbranched olefin having from about 3 to about 14 carbon atoms or a mixture of unbranched olefins, having an unsaturated hydrocarbon structure: ##STR3## wherein R and R 1 and a hydrogen, a straight chain alkyl group or a straight chain alkenyl group containing from about 1 to about 12 carbon atoms but no more than one of said R and R 1 can be hydrogen, to an ether, or a mixture of ethers, which comprises passing a hydrocarbon alcohol and said olefin, or mixture of olefins, in a molar ratio of about 1:1 to about 15:1 in the vapor phase through a catalyst bed of silicatungstic acid at a liquid hourly space velocity of about 0.02 to about 2 volume of feed per volume of catalyst per hour at a temperature of about 50° to about 200° C. and a pressure of about 0.1 to about 10 atmospheres.
Claim 3
Dependent Claim
18 words
A process according to claim 1 wherein said olefin has from about 4 to about 10 carbon atoms.
Claim 4
Dependent Claim
22 words
A process according to claim 1 wherein said alkyl and said alkenyl groups contain from about 1 to about 8 carbon atoms.
Claim 5
Dependent Claim
16 words
A process according to claim 1 wherein said alcohol contains from 1 to 3 carbon atoms.
Claim 6
Dependent Claim
15 words
A process according to claim 1 wherein said alcohol contains 1 to 2 carbon atoms.
Claim 7
Dependent Claim
11 words
A process according to claim 1 wherein said alcohol is methanol.
Claim 8
Dependent Claim
16 words
A process according to claim 1 wherein said ratio is from about 2:1 to about 5:1.
Claim 9
Dependent Claim
18 words
A process according to claim 1 wherein said silicatungstic acid has the formula: SiO 2 .12WO 3 .
Claim 10
Dependent Claim
28 words
A process according to claim 1 wherein said silicatungstic acid is deposited on silica in an acid to silica weight ratio of about 5 to about 100 percent.
Claim 11
Dependent Claim
16 words
A process according to claim 9 wherein said ratio is about 30 to about 100 percent.
Claim 12
Dependent Claim
28 words
A process according to claim 1 wherein said liquid hourly space velocity ranges from about 0.1 to about 0.5 volume of feed per volume of catalyst per hour.
Claim 13
Dependent Claim
17 words
A process according to claim 1 wherein said temperature ranges from about 80° to about 120° C.
Claim 14
Dependent Claim
12 words
A process according to claim 1 wherein said pressure is ambient pressure.
Claim 15
Dependent Claim
11 words
A process according to claim 1 wherein said alcohol is ethanol.
Claim 16
Dependent Claim
11 words
A process according to claim 1 wherein said alcohol is propanol.
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) | 1982-11-19 | 1983-05-21 | 1983-11-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-11-19 | 1987-05-21 | 1987-11-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-11-19 | 1991-05-21 | 1991-11-20 | $7700.00 | Window Closed / Lapsed |