PROCESS FOR PURIFYING VALINE

摘要

An aqueous solution containing valine is reacted with p-isopropylbenzenesulfonic acid or a watersoluble salt thereof to form valine p-isopropyl-benzenesulfonate crystals. The valine p-isopropyl-benzenesulfonate crystals are separated from the solution and the valine p-isopropylbenzenesulfonate is then dissociated to obtain valine having a high purity. Since the solubility of valine pisopropylbenzenesulfonate is low, valine can be obtained in high yield. The valine p-isopropyl-benzenesulfonate in crystal form obtained in the process of the invention and comprising 1 mole of valine and 1 mole of p-isopropylbenzenesulfonic acid represents a novel product.