Process for producing aromatic aldehydes
AssigneeMitsubishi Gas Chemical Company, Inc.
InventorsShigeo Yoshinaka, Tsukasa Toki, Misuzu Wakatsuki, Seiji Uchiyama
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Abstract
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.
Claims3
In a process for producing aromatic aldehydes by reacting chlorinated methylbenzenes with nitric acid, the improvement wherein a lead compound selected from the group consisting of lead nitrate, lead carbonate or lead hydroxide 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.
Dependencies are inferred from the claim text.