Catalyzed hydrogenation of carboxylic acids and their anhydrides to alcohols and/or esters
US4985572A · kind A · utility
Assignees
Inventors
Key dates
| Filing date | Nov 21, 1988 |
| Grant date | Jan 15, 1991 |
| Priority date | — |
| Expiry date | Nov 21, 2008 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C67/00
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
An alcohol and/or a carboxylic acid ester is produced from a carboxylic acid or anhydride thereof by reacting the acid or anhyride with hydrogen at elevated temperature in the presence as catalyst of a composition comprising an alloy of (i) at least one noble metal of Group VIII of the Periodic Table and (ii) at least one metal capable of alloying with the Group VIII noble metal, optionally including a support and at least one of the metals rhenium, tungsten or molybdenum. The process is particularly applicable to the hydrogenation of monobasic acids, for example acetic acid, and the hydrogenation of maleic acid or maleic anhydride to gamma-butyrolactone.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.