Process of refining C6-C16 aliphatic diols
US8143457B2 · kind B2 · utility
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19Claims
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Key dates
| Filing date | Jul 7, 2008 |
| Grant date | Mar 27, 2012 |
| Priority date | — |
| Expiry date | Aug 10, 2028 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C2601/14
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
A process of refining a crude C6-C16 aliphatic diol, preferably, a C6-C16 monocyclic aliphatic diol, more preferably, an isomeric mixture of cis/trans-(1,3)(1,4)-cyclohexanedimethanol, containing in addition to the diol one or more impurities selected from phenols, and aliphatic mono-ols, esters, carboxylic acids, and hemiacetals, and mixtures thereof. The refining process involves distilling the crude C6-C16 aliphatic diol in the presence of an alkali or alkaline earth metal compound, preferably, an excess thereof relative to acid equivalents present in the diol.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.