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US 5,689,001 AGranted
Process for purifying valine
AssigneeAjinomoto Co., Inc.
InventorsKazuhiro Hasegawa, Tetsuya Kaneko, Noriko Takahashi, Chiaki Sano
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Abstract
A process is provided for obtaining high-purity valine in high yield by a simple method using an inexpensive precipitant of p-isopropylbenzene sulfonic acid or a water-soluble salt thereof.
Claims20
A crystalline valine p-isopropylbenzenesulfonate comprising a reaction product of equimolar amounts of valine and p-isopropylbenzenesulfonic acid.
A process for purifying valine, comprising:
- contacting a valine-containing aqueous solution with p-isopropylbenzenesulfonic acid or a water-soluble salt thereof to form crystalline valine p-isopropylbenzenesulfonate in an aqueous medium;
- separating the crystalline valine p-isopropylbenzenesulfonate from the aqueous medium;
- and
- dissociating the valine p-isopropylbenzenesulfonate to obtain valine.
1 more element
Dependencies are inferred from the claim text.