Method for making methionine
US10494335B2 · kind B2 · utility
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3References
11Claims
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Assignee
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Key dates
| Filing date | Apr 15, 2016 |
| Grant date | Dec 3, 2019 |
| Priority date | — |
| Expiry date | Apr 17, 2036 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C323/58
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
The invention concerns a continuous process for manufacturing methionine by alkaline hydrolysis of methionine hydantoin in aqueous phase, removing NH3 and CO2 of the hydrolysis medium, and neutralizing the obtained methioninate salt, according to which, after removal of NH3 and CO2, the hydrolysis reaction medium is concentrated to precipitate Na2CO3, said Na2CO3 being separated then recycled for alkaline hydrolysis, the latter being carried out in the presence of NaOH and Na2CO3.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.