Patent US4611085A successfully refreshed from Google Patents.
US4611085A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vapour phase hydrogenation of esters
Assignee: BP PLC
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Filing: 1984-04-18
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Granted: 1986-09-09
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Expires: 2004-04-18
Abstract
Abstract The present invention relates to the vapour phase hydrogenation of carboxylic acid esters to give alcohols. More particularly, this invention pertains to a process for the production of an alcohol by hydrogenation of an ester with a hydrogenation catalyst comprising a Group VIII element, a promoter, and a carbon support. This process is characterized in that (1) the Group VIII element is ruthenium, nickel, or rhodium, (2) the promoter is introduced on to the carbon as a water stable compound of Group IA, IIA metal, a lanthanide or actinide, and (3) the carbon has a BET surface area of at least 100 m 2 /g, and a ratio of BET to basal plane surface area not greater than 4:1, and (4) the hydrogenation is carried out in the vapor phase at a temperature in the range 100° C. to 400° C. at a total space velocity of 100 to 120,000.
Inventors
- 👤 Melanie Kitson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 17:38
CPC Classifications
B; B01; B01J; B01J23/00; B01J23/70; B01J23/76; B01J23/83; B01J23/38; B01J23/54; B01J23/56; B01J23/58; B01J23/63; B01J23/78; C; C07; C07C; C07C29/00; C07C29/132; C07C29/136; C07C29/147; C07C29/149
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
147 words
A process for the production of an alcohol by hydrogenation of an ester of a carboxylic acid having 1 to 20 carbon atoms with a hydrogenation catalyst comprising a Group VIII element, a promoter, and a carbon support is characterised in that (1) the Group VIII element is ruthenium, nickel, or rhodium, (2) the promoter is introduced on to the carbon as a water stable compound of Group IA, metal excluding lithium Group IIA metal excluding beryllium and magnesium, a lanthanide or actinide, and (3) the carbon has a BET surface area of at least 100 m 2 /g, and a ratio of BET to basal plane surface area not greater than 4:1, and (4) the hydrogenation is carried out in the vapour phase at a temperature in the range 100° C. to 400° C. at a total gas hourly space velocity of 100 to 120 000.
Claim 2
Dependent Claim
147 words
A process for the production of an alcohol by hydrogenation of an ester of a carboxylic acid having 1 to 20 carbon atoms with a hydrogenation catalyst comprising a Group VIII element, a promoter, and a carbon support is characterised in that (1) the Group VIII element is ruthenium, nickel, or rhodium, (2) the promoter is introduced on to the carbon as a water stable compound of Group IA, metal excluding lithium Group IIA metal excluding beryllium and magnesium, a lanthanide or actinide, and (3) the carbon has a BET surface area of at least 100 m 2 /g, and a ratio of BET to basal plane surface area not greater than 4:1, and (4) the hydrogenation is carried out in the vapour phase at a temperature in the range 100° C. to 400° C. at a total gas hourly space velocity of 100 to 120 000.
Claim 3
Dependent Claim
23 words
A process according to claim 1 wherein the hydrogenation reaction is carried out at a temperature in the range 180° to 350° C.
Claim 4
Dependent Claim
19 words
A process according to either of claim 2 wherein the pressure is in the range 1 to 100 kPa.
Claim 5
Dependent Claim
21 words
A process according to claim 2 wherein the molar ratio of hydrogen to ester is in the range 2:1 to 100:1.
Claim 6
Dependent Claim
23 words
A process according to claim 1 wherein the total gas hourly space velocity over the catalyst is in the range 100 to 1200.
Claim 7
Dependent Claim
30 words
A process according to claim 1 wherein the ester is an ester of a carboxylic acid having from 1 to 20 carbon atoms in the molecule and a primary alcohol.
Claim 8
Dependent Claim
18 words
A process according to claim 1 wherein the carbon has a BET/basal plane surface area ratio of 2.5:1.
Claim 9
Dependent Claim
22 words
A process according to claim 1 wherein the ratio of basal plane surface area to edge surface area is at least 10:1.
Claim 10
Dependent Claim
22 words
A process according to claim 8 wherein the ratio of basal plane surface area to edge surface area is at least 100:1.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-09-08 | 1990-03-10 | 1990-09-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-09-08 | 1994-03-10 | 1994-09-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-09-08 | 1998-03-10 | 1998-09-09 | $7700.00 | Window Closed / Lapsed |