Organic compounds -- part of the class 532-570 series – Organic compounds – Carboxylic acids and salts thereof
Patent
1998-02-26
2000-06-06
Geist, Gary
Organic compounds -- part of the class 532-570 series
Organic compounds
Carboxylic acids and salts thereof
C09C22700
Patent
active
060720832
ABSTRACT:
A method for purifying an amino acid selected from the group consisting of valine, leucine and isoleucine easily in high yield and with high purity using an inexpensive precipitant, comprising allowing p-ethylbenzenesulfonic acid or its water-soluble salt to act on an aqueous solution containing an amino acid to form crystals of the amino acid p-ethylbenzenesulfonate and then separating and decomposing the crystals to purify and obtain the amino acid. The p-ethylbenzenesulfonic acid may be used as the free acid, an alkali metal salt and an ammonium salt.
Hasegawa Kazuhiro
Iitani Kinzo
Kaneko Tetsuya
Nakamura Toru
Okamoto Yutaka
Ajinomoto Co. Inc.
Geist Gary
Oh Taylor V
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