Method for the production of high-purity ethylene glycols
US4358625A · kind A · utility
5Cited by
5References
4Claims
0Family size
Assignee
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Key dates
| Filing date | Mar 9, 1979 |
| Grant date | Nov 9, 1982 |
| Priority date | — |
| Expiry date | Mar 9, 1999 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C29/106
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
A method is disclosed for obtaining high-purity ethylene glycols in which the improvement consists in reducing the oxygen-containing organic impurities by treating their aqueous solutions as obtained during the processing of ethylene oxide with a solution of an alkali metal borohydride, sodium borohydride being preferred. A definitely alkaline environment is preferred. Ethylene glycols can thus be obtained which are particularly suitable for use in the fibre-manufacturing industry. Such glycols have extremely low UV-absorbance values.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.