METHOD OF PRODUCING METHIONINE Russian patent published in 2019 - IPC C07C319/20 C07C319/28 C07C323/58

Abstract RU 2708258 C2

FIELD: chemistry.

SUBSTANCE: invention relates to a continuous method of producing methionine by alkaline hydrolysis of methionine hydantoin in an aqueous phase, removing NH₃ and CO₂ from hydrolysis medium and neutralization of obtained methioninate. Method is characterized by that after removal of NH₃ and CO₂ hydrolysis reaction medium is concentrated to precipitate Na₂CO₃, which is separated and then reused for alkaline hydrolysis, which is carried out in the presence of NaOH and Na₂CO₃.

EFFECT: disclosed method enables to obtain high-purity methionine and substantially reduces the amount of sodium sulphate formed.

13 cl, 1 dwg, 3 ex

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RU 2 708 258 C2

Authors

Kapel Nikola

Rej Patrik

Dates

2019-12-05—Published

2016-04-15—Filed