L-tryptophan refining method

The invention provides an L-tryptophan refining method. The method comprises the steps of dissolving crude products in a water and acetic acid mixed solvent; adding an antioxidant, and regulating the pH value; adding activated carbon for decoloration, and then conducting filtration; conducting cooli...

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Bibliographic Details
Main Authors HUANG PING, WU WEIBIN, HUANG JIANZHONG, WU SONGGANG, GUO XIAOLEI
Format Patent
LanguageEnglish
Published 23.09.2015
Subjects
CHEMISTRY
HETEROCYCLIC COMPOUNDS
METALLURGY
ORGANIC CHEMISTRY
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Summary:The invention provides an L-tryptophan refining method. The method comprises the steps of dissolving crude products in a water and acetic acid mixed solvent; adding an antioxidant, and regulating the pH value; adding activated carbon for decoloration, and then conducting filtration; conducting cooling crystallization, centrifugal collection of crystals and drying to obtain L-tryptophan. The purity of L-tryptophan refined with the method is not lower than 99.5%. Compared with a vacuum concentration recrystallization refining method, the method has the advantages that steam consumption is reduced greatly, and yield each time is increased by over 50%.
Bibliography:Application Number: CN201510406813