Mitsubishi Gas Chemical Company, Inc.

Misuzu Wakatsuki

Shigeo Yoshinaka

Seiji Uchiyama

Tsukasa Toki

In a process for producing aromatic aldehydes by reacting chlorinated methylbenzenes with nitric acid, the improvement wherein a lead compound is added to the residue left after separation and recovery of the resulting aromatic aldehydes from the reaction mixture thereby to remove a chlorine ion present in the residue as a precipitate of lead chloride, and the residue left after removal of the lead chloride is recycled to the reaction of the chlorinated methylbenzenes with nitric acid.

Growing community of inventors

Niigata, Japan

Misuzu Wakatsuki