发明名称 |
Method of purifying glutamic acid by transition recrystallization |
摘要 |
Disclosed herein is a method of purifying L-glutamic acid by transformation recrystallization which method comprises maintaining crude crystals of L-glutamic acid containing a crystals of L-glutamic acid in an aqueous solvent at a temperature of from 50° C. to the boiling point of said aqueous solvent in the coexistence of active carbon until about 30% or more of the crystals of L-glutamic acid have been transformed into beta crystals thereof, the amount of said aqueous solvent being an amount not more than the amount sufficient (i.e., an amount insufficient) to form a saturated solution of said crystals of L-glutamic acid, according to which method purified crystals of L-glutamic acid can be obtained extremely rapidly and in high yields, and remarkably conveniently and easily on an industrial scale, as compared with the conventional transformation recrystallization method which is a hitherto common purification method of L-glutamic acid.
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申请公布号 |
US2004152917(A1) |
申请公布日期 |
2004.08.05 |
申请号 |
US20040761253 |
申请日期 |
2004.01.22 |
申请人 |
SAITOU YOSHIKI;KODA TAKAYUKI;UEDA HIROSHI;SATO KAZUHIRO |
发明人 |
SAITOU YOSHIKI;KODA TAKAYUKI;UEDA HIROSHI;SATO KAZUHIRO |
分类号 |
C12P13/14;C07C227/42;C07C229/24;(IPC1-7):C07C229/02 |
主分类号 |
C12P13/14 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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