EP0198682A2
Expired / Lapsed
EP
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Alcohols production by hydrogenation of carboxylic acids
Assignee: BP Chemicals Ltd
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Filing: 1986-04-11
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Granted: —
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Expires: 2006-04-11
Abstract
Abstract An alcohol and/or carboxylic acid ester is (are) produced from a C 2 to C 12 carboxylic acid by contacting the carboxylic acid at elevated temperature and pressure with hydrogen in the presence of a heterogeneous catalyst characterised in that the catalyst comprises a first component which is either molybdenum or tungsten and a second component which is a noble metal of Group VIII of the Periodic Table of the Elements, optionally on a support, for example a high surface area graphitised carbon.
Inventors
- 👤 Melanie Kitson
- 👤 Peter Sefton Williams
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-27 09:03
CPC Classifications
C; C07; C07C; C07C29/00; C07C29/132; C07C29/136; C07C29/147; C07C29/149; Y; Y10; Y10S; Y10S502/00; Y10S502/525
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
76 words
1 A process for the production of an alcohol and/or a carboxylic acid ester from a C 2 to C 12 carboxylic acid by contacting the carboxylic acid at elevated temperature and pressure with hydrogen in the presence of a heterogeneous catalyst characterised in that the catalyst comprises a first component which is either molybdenum or tungsten and a second component which is a noble metal of Group VIII of the Periodic Table of the Elements.
Claim 2
Dependent Claim
76 words
1 A process for the production of an alcohol and/or a carboxylic acid ester from a C 2 to C 12 carboxylic acid by contacting the carboxylic acid at elevated temperature and pressure with hydrogen in the presence of a heterogeneous catalyst characterised in that the catalyst comprises a first component which is either molybdenum or tungsten and a second component which is a noble metal of Group VIII of the Periodic Table of the Elements.
Claim 3
Dependent Claim
17 words
2 A process according to claim 1 wherein the second component is either palladium, rhodium or ruthenium.
Claim 4
Dependent Claim
22 words
3 A process according to either claim 1 or claim 2 wherein the catalyst includes a third component which is a support.
Claim 5
Dependent Claim
17 words
4 A process according to claim 3 wherein the support is a high surface area graphitised carbon.
Claim 6
Dependent Claim
13 words
5 A process according to claim 3 wherein the support is a silica.
Claim 7
Dependent Claim
34 words
6 A process according to any one of the preceding claims wherein the catalyst is modified by the inclusion of one or more metals of Groups IA, IIA, or IVA of the Periodic Table.
Claim 8
Dependent Claim
13 words
7 A process according to claim 6 wherein the modifying metal is potassium.
Claim 9
Dependent Claim
88 words
8 A process for the production of a catalyst for use in the process of claim 1 which process comprises the steps of:- (A) impregnating a support with a solution of a soluble noble metal compound thermally decomposable/reducible to the metal and subsequently removing the solvent therefrom, (B) heating the Group VIII noble metal on the support, and (C) impregnating the noble metal impregnated support with a solution of a soluble molybdenum or tungsten compound thermally decomposable/reducible to the metal and/or oxide and thereafter removing the solvent therefrom.
Claim 10
Dependent Claim
36 words
9 A process according to claim 8 wherein the Group VIII noble metal on the support is heated at an elevated temperature in the range from 150 to 350°C in the presence of an inert gas.
Claim 11
Dependent Claim
36 words
10 A process according to claim 8 wherein the Group VIII noble metal on the support is heated at an elevated temperature in the range from 100 to 350°C in the presence of a reducing gas.
Claim 12
Dependent Claim
54 words
11 A process according to claim 8 wherein the Group VIII noble metal on the support is heated at an elevated temperature in the range from 100 to 300°C in the presence of an oxygen-containing gas, provided that when the support is a high surface area graphitised carbon the upper temperature limit is 200°C.
Claim 13
Dependent Claim
47 words
12 A process according to any of the preceding claims wherein the catalyst is activated before use in the process of claim 1 by contact at an elevated temperature in the range from 200 to 350°C with hydrogen for a period of from 1 to 20 hours.
Claim 14
Dependent Claim
28 words
13 A process according to any one of claims 1 to 11 wherein the catalyst is activated by heating to the reaction temperature in the presence of reactants.
Claim 15
Dependent Claim
24 words
14 A process according to any one of claims 1 to 6 wherein the elevated temperature is in the range from 150 to 250°C.
Claim 16
Dependent Claim
52 words
15 A process according to any one of claims 1 to 6 and 10 wherein the carboxylic acid is contacted in the vapour phase with hydrogen. 16 A process according to claim 1 when operated in the liquid phase at low conversions to produce a product substantially comprising a carboxylic acid ester.
Claim 17
Dependent Claim
40 words
17 A catalyst for use in the process of claim 1 comprising a first component which is either molybdenum or tungsten, and a second component which is a noble metal of Group VIII of the Periodic Table of the Elements.
References Cited (Backward Citations)
No citation records indexed.
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