Chemistry: molecular biology and microbiology – Micro-organism – tissue cell culture or enzyme using process... – Preparing alpha or beta amino acid or substituted amino acid...
Reexamination Certificate
2006-04-13
2010-10-05
Lilling, Herbert J. (Department: 1657)
Chemistry: molecular biology and microbiology
Micro-organism, tissue cell culture or enzyme using process...
Preparing alpha or beta amino acid or substituted amino acid...
C435S106000, C435S107000, C435S114000
Reexamination Certificate
active
07807420
ABSTRACT:
The invention relates to a method for recovering a basic amino acid from the fermentation liquor of a micro-organism strain that produces the basic amino acid. The method comprises the following steps: a) isolation of the micro-organisms from the fermentation liquor and b) separation of the basic amino acid from the aqueous liquor that has been obtained in step a) by the successive charging of a single or multiple stage arrangement of a strongly acidic cation exchanger in the form of a salt with the liquor obtained in step a) and the elution of the basic amino acid. According to the invention, prior to the charging process in step b), the aqueous liquor has a pH value ranging between 4 and 7.5 and at least the first stage of the carbon exchanger arrangement is pre-treated with an aqueous acid in such a way that at the end of said pre-treatment, the pH value at the discharge of the pre-treated cation exchanger ranges between 4.5 and 7.
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Choi Jong-Kyu
Choi Jong-Soo
Han Duck-Keun
Hong Il-Kwon
Kim Hyun-Ho
Gulati, Esq. Maneesh
Hanley, Esq. Elizabeth A.
Lilling Herbert J.
McCarter & English LLP
Paik Kwang Industrial Co., Ltd.
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