Process for the preparation of ethylene glycol
US4677234A · kind A · utility
11Cited by
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12Claims
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Key dates
| Filing date | Feb 4, 1985 |
| Grant date | Jun 30, 1987 |
| Priority date | — |
| Expiry date | Feb 4, 2005 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C29/149
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
A process for the preparation of ethylene glycol by the vapor phase catalytic hydrogenation of at least one of di(lower alkyl) oxalate and lower alkyl glycolate in the presence of a hydrogenation catalyst comprising a carrier, which catalyst is suitable for the hydrogenation of alkyl oxalate and alkyl glycolate to ethylene glycol, wherein the improvement lies in preparing the catalyst by contacting the carrier with a cooper ammonium carbonate complex medium and reducing the catalytically-active copper moiety to its active copper form.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.