Dai-ichi Kogyo Seiyaku Co., Ltd.

Masao Sasaki

Toshio Yamauchi

A process for producing a corn milling residue carboxymethyl ether salt comprises reacting a corn milling residue with alkali in the presence of an aqueous carboxymethylating agent solution to give a corn milling residue carboxymethyl ether salt with an average degree of substitution not less than 0.2. As the reaction medium, water alone is used in a proportion of at least 7 moles per mole of the corn milling residue. Carboxymethylation of the corn milling residue is accomplished evenly and smoothly.

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Kyoto, Japan

Masao Sasaki