Recovery of butanol isomers from a mixture of butanol isomers, water, and an organic extractant
US8968523B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 13, 2010 |
| Grant date | Mar 3, 2015 |
| Priority date | — |
| Expiry date | Mar 31, 2031 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C29/84
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A process for recovering butanol from a mixture of a water-immiscible organic extractant, water, butanol, and optionally a non-condensable gas, is provided. The butanol is selected from 1-butanol, isobutanol, and mixtures thereof. An overhead stream from a first distillation column is decanted into two liquid phases. The wet butanol phase is refined in a second distillation column; the aqueous phase is returned to the first distillation column. A portion of the wet butanol phase from the decanter is also returned to the first distillation column. The extractant may be C7 to C22 fatty alcohols, C7 to C22 fatty acids, esters of C7 to C22 fatty acids, C7 to C22 fatty aldehydes, and mixtures thereof.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.