Process for separating monochloroacetic acid and dichloroacetic acid via extractive distillation
US9073848B2 · kind B2 · utility
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20Claims
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Key dates
| Filing date | Mar 13, 2012 |
| Grant date | Jul 7, 2015 |
| Priority date | — |
| Expiry date | Mar 13, 2032 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C51/62
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
The present invention pertains to a process for separating monochloroacetic acid and dichloroacetic acid from one another via extractive distillation, comprising the steps of (i) contacting a mixture comprising monochloroacetic acid and dichloroacetic acid with an extractive agent which is chemically stable and which has a BF3 affinity of between 65 kJ/mole and 110 kJ/mole, (ii) distilling the mixture to obtain a monochloroacetic acid stream and a stream comprising dichloroacetic acid and the extractive agent, and (iii) regenerating the extractive agent.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.