Method for extracting cysteine or salt thereof from reaction liquid and application of cysteine or salt thereof

Method for extracting cysteine or salt thereof from reaction liquid and application of cysteine or salt thereof

The invention discloses a method for extracting cysteine or salt thereof from a reaction liquid, which comprises the following steps: (1) pretreating the reaction liquid containing cysteine to obtain a pretreatment liquid; (2) carrying out cyclization reaction on cysteine in the pretreatment liquid...

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Hauptverfasser: ZENG QINGYU, ZHU YONGQIANG, LUO CHAOQUN, ZHAO DAN, CHI SHENGFENG, WEN JUNTING, CHI SANG-WOO, SHENG MIAOPENG
Format: Patent
Sprache:chi ; eng
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ACYCLIC OR CARBOCYCLIC COMPOUNDS
CHEMISTRY
HETEROCYCLIC COMPOUNDS
METALLURGY
ORGANIC CHEMISTRY
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creator ZENG QINGYU
ZHU YONGQIANG
LUO CHAOQUN
ZHAO DAN
CHI SHENGFENG
WEN JUNTING
CHI SANG-WOO
SHENG MIAOPENG
description The invention discloses a method for extracting cysteine or salt thereof from a reaction liquid, which comprises the following steps: (1) pretreating the reaction liquid containing cysteine to obtain a pretreatment liquid; (2) carrying out cyclization reaction on cysteine in the pretreatment liquid and a compound containing an aldehyde group or a keto functional group, and after the reaction is finished, carrying out separation treatment to obtain a thiazolidine acid intermediate; and (3) carrying out hydrolysis reaction on the thiazolidine acid intermediate in the step (2) in an acid environment, and after the reaction is finished, carrying out post-treatment to obtain the cysteine or the salt thereof. The extraction method is simple in operation process, greatly reduces discharge of waste water and inorganic waste salt, is small in corrosion to equipment and pipelines, and is green, environment-friendly and efficient in the whole process. The invention also provides a preparation method of cysteine or salt
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subjects ACYCLIC OR CARBOCYCLIC COMPOUNDS
CHEMISTRY
HETEROCYCLIC COMPOUNDS
METALLURGY
ORGANIC CHEMISTRY
title Method for extracting cysteine or salt thereof from reaction liquid and application of cysteine or salt thereof
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