US4265828A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Manufacture of ethylene glycol from synthesis gas
Assignee: Huntsman Corp
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Filing: 1979-12-31
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Granted: 1981-05-05
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Expires: 1999-12-31
Abstract
Abstract This invention concerns a process of making ethylene glycol which comprises the steps of contacting a mixture of CO and H 2 with a catalyst system comprising a ruthenium-containing compound dispersed in a low melting quaternary phosphonium or ammonium base or salt, and heating said resultant reaction mixture under a pressure of 500 psi or greater at a temperature of at least 150° C. for a sufficient time to provide said ethylene glycol.
Inventors
- 👤 John F. Knifton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 20:52
CPC Classifications
C; C07; C07C; C07C27/00; C07C27/04; C07C27/06; C07C29/00; C07C29/15; C07C29/151; C07C29/1512; C07C29/1514; B; B29; B29C; B29C66/00; B29C66/80; B29C66/81; B29C66/816; B29C66/8161; C07C29/153; C07C29/156; C07C29/157; Y; Y02; Y02P; Y02P20/00; Y02P20/50; Y02P20/52
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
70 words
A process of making ethylene glycol which comprises the steps of contacting a mixture of CO and H 2 with a catalyst system comprising a ruthenium-containing compound dispersed in a low melting quaternary phosphonium or ammonium base or salt and heating said resultant reaction mixture under a pressure of 500 psi or greater at a temperature of at least 180° C. for a sufficient time to provide said ethylene glycol.
Claim 2
Dependent Claim
70 words
A process of making ethylene glycol which comprises the steps of contacting a mixture of CO and H 2 with a catalyst system comprising a ruthenium-containing compound dispersed in a low melting quaternary phosphonium or ammonium base or salt and heating said resultant reaction mixture under a pressure of 500 psi or greater at a temperature of at least 180° C. for a sufficient time to provide said ethylene glycol.
Claim 3
Dependent Claim
20 words
The process of claim 1 wherein said quaternary salt or base has a melting point less than about 180° C.
Claim 4
Dependent Claim
13 words
The process of claim 2 wherein said quaternary salt is a tetraalkylphosphonium salt.
Claim 5
Dependent Claim
13 words
The process of claim 3 wherein said alkyl groups contain 1-6 carbon atoms.
Claim 6
Dependent Claim
14 words
The process of claim 2 wherein said quaternary is a mixed alkylaryl phosphonium quaternary.
Claim 7
Dependent Claim
12 words
The process of claim 4 wherein said quaternary salt is tetrabutylphosphonium salt.
Claim 8
Dependent Claim
41 words
The process of claim 1 wherein the ruthenium-containing compound is selected from the group consisting of one or more oxides of ruthenium, ruthenium salts of a mineral acid, ruthenium salts of an organic carboxylic acid and ruthenium carbonyl or hydrocarbonyl derivatives.
Claim 9
Dependent Claim
36 words
The process of claim 7 wherein the ruthenium-containing compound is selected from the group consisting of anhydrous ruthenium(IV) dioxide, ruthenium(IV) dioxide hydrate, ruthenium(VIII) tetraoxide, ruthenium(III) trichloride hydrate, ruthenium acetate, ruthenium propionate, ruthenium(III) acetylacetonate and triruthenium dodecarbonyl.
Claim 10
Dependent Claim
12 words
The process of claim 8 wherein said ruthenium-containing compound is ruthenium(IV) dioxide.
Claim 11
Dependent Claim
12 words
The process of claim 8 wherein said ruthenium-containing compound is ruthenium(III) trichloride.
Claim 12
Dependent Claim
27 words
The process of claim 6 wherein said tetrabutylphosphonium salt is selected from the group consisting of tetrabutylphosphonium bromide, tetrabutylphosphonium chloride, tetrabutylphosphonium iodide, tetrabutylphosphonium acetate and tetrabutylphosphonium chromate.
Claim 13
Dependent Claim
13 words
The process of claim 1 wherein said quaternary phosphonium base is tetrabutylphosphonium hydroxide.
References Cited (Backward Citations)
US2636046A
Cited
US4170605A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-05-04 | 1984-11-03 | 1985-05-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-05-04 | 1988-11-03 | 1989-05-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-05-04 | 1992-11-03 | 1993-05-05 | $7700.00 | Window Closed / Lapsed |