Method for manufacturing 2-hydroxy-4-(methylthio)butyric acid
US11242316B2 · kind B2 · utility
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15Claims
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Key dates
| Filing date | Mar 9, 2018 |
| Grant date | Feb 8, 2022 |
| Priority date | — |
| Expiry date | Apr 29, 2038 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C319/28
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
A method for manufacturing 2-hydroxy-4-(methylthio)butyric acid (HMTBA) from 2-hydroxy-4-methylthio-butyronitrile (HMTBN), where HMTBN is hydrolyzed into HMTBA in the presence of a mineral acid in an aqueous medium, the medium is neutralized by addition of a base, a first phase including at least HMTBA and salts and a second phase containing salts are separated, the method including the separation of the HMTBA from the salts of the first phase, by subjecting the latter to a chromatography.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.