Separation of 2-methyl-butanol-1 from pentanol-1 by extractive distillation
US4969977A · kind A · utility
15Cited by
8References
5Claims
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Key dates
| Filing date | Jan 30, 1989 |
| Grant date | Nov 13, 1990 |
| Priority date | — |
| Expiry date | Jan 30, 2009 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C29/84
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
2-Methyl butanol-1 cannot be completely removed from 2-methyl butanol-1-pentanol-1 mixtures by distillation because of the proximity of their boiling points. 2-methyl butanol-1 can be readily removed from mixtures of these alcohols by using extractive distillation in which the extractive agent is a mixture of aromatic carboxylic acids or aromatic carboxylic esters. Typical examples of effective agents are: benzoic acid, ethyl salicylate and salicylic acid; methyl benzoate, methyl p-hydroxy benzoate and phenyl salicylate.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.