Liquid-liquid extraction of isobutyric acid from aqueous HF solutions thereof
US4270983A · kind A · utility
2Cited by
5References
4Claims
0Family size
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Key dates
| Filing date | Feb 4, 1980 |
| Grant date | Jun 2, 1981 |
| Priority date | — |
| Expiry date | Feb 4, 2000 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C51/48
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
A method for recovering isobutyric acid from a solution thereof in concentrated aqueous hydrogen fluoride, the latter having served as the reaction medium for effecting the carbonylation of propylene. The method features the partial removal of anhydrous hydrogen fluoride from said solution to provide an aqueous phase of reduced hydrogen fluoride content from whence the isobutyric acid is extracted with optimum efficiency with an immiscible organic solvent.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.