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US4146741A
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Conversion of furan to 1,4-butanediol and tetrahydrofuran
Assignee: EIDP Inc
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Filing: 1977-08-15
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Granted: 1979-03-27
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Expires: 1997-08-15
Abstract
Abstract Furan is hydrogenated in the presence of a nickel catalyst and a dicarboxylic acid having 4 to 10 carbons to produce 1,4-butanediol and tetrahydrofuran.
Inventors
- 👤 William W. Prichard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 23:13
CPC Classifications
C; C07; C07C; C07C29/00; C07C29/132; C07C29/136; C07C29/14; C07C29/141; C07C29/17; C07C29/172; C07D; C07D307/00; C07D307/02; C07D307/04; C07D307/06; C07D307/08
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
92 words
The process of making 1,4-butanediol by contacting furan, water and hydrogen at a temperature in the range of 150°-190° C. under a hydrogen pressure of 500-900 pounds per square inch in the presence of a nonpyrophoric nickel hydrogenation catalyst and an aliphatic dicarboxylic acid or anhydride of 4 to 10 carbon atoms or a derivative thereof having one free carboxylic group, the water/furan molar ratio being at least 2.5 and the amount of said dicarboxylic acid or derivative being at least 1.6 equivalents per liter of combined volume of water and furan.
Claim 2
Dependent Claim
92 words
The process of making 1,4-butanediol by contacting furan, water and hydrogen at a temperature in the range of 150°-190° C. under a hydrogen pressure of 500-900 pounds per square inch in the presence of a nonpyrophoric nickel hydrogenation catalyst and an aliphatic dicarboxylic acid or anhydride of 4 to 10 carbon atoms or a derivative thereof having one free carboxylic group, the water/furan molar ratio being at least 2.5 and the amount of said dicarboxylic acid or derivative being at least 1.6 equivalents per liter of combined volume of water and furan.
Claim 3
Dependent Claim
17 words
The process of claim 1 carried out at a hydrogen pressure of 600-800 pounds per square inch.
Claim 4
Dependent Claim
21 words
The process of claim 1 wherein the nickel catalyst contains about 2-35% by weight of copper based on the nickel content.
Claim 5
Dependent Claim
10 words
The process of claim 1 wherein the catalyst is supported.
Claim 6
Dependent Claim
13 words
The process of claim 1 wherein the catalyst is nickel supported on alumina.
Claim 7
Dependent Claim
13 words
The process of claim 1 wherein the catalyst is nickel supported on kieselguhr.
Claim 8
Dependent Claim
15 words
The process of claim 1 wherein the catalyst is nickel and copper supported on alumina.
Claim 9
Dependent Claim
20 words
The process of claim 7 wherein the catalyst contains by weight about 47% of nickel and about 16% of copper.
Claim 10
Dependent Claim
18 words
The process of claim 1 wherein the catalyst contains nickel and the dicarboxylic acid compound is adipic acid.
Claim 11
Dependent Claim
13 words
The process of claim 9 wherein the dicarboxylic acid compound is glutaric acid.
Claim 12
Dependent Claim
13 words
The process of claim 9 wherein the dicarboxylic acid compound is succinic acid.
Claim 13
Dependent Claim
13 words
The process of claim 9 wherein the dicarboxylic acid compound is maleic anhydride.
Claim 14
Dependent Claim
13 words
The process of claim 9 wherein the dicarboxylic acid compound is sebacic acid.
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) | 1982-03-26 | 1982-09-25 | 1983-03-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-03-26 | 1986-09-25 | 1987-03-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-03-26 | 1990-09-25 | 1991-03-27 | $7700.00 | Window Closed / Lapsed |