The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 06, 1987
Filed:
Nov. 05, 1982
Applicant:
Inventors:
Assignee:
Daicel Chemical Industries, Ltd., Sakai, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07C / ;
U.S. Cl.
CPC ...
562531 ;
Abstract
A process for producing glyoxylic acid is disclosed which comprises oxidizing glyoxal with an aqueous oxidizing agent composition obtained from nitric acid and a nonoxidizing strong acid present in a concentration of 6 to 40 wt. % in the reaction mixture. Preferably, the nonoxidizing strong acid is hydrochloric acid and the reaction is carried out while nitric acid is gradually added to the reaction mixture so that the concentration of said nitric acid in said reaction mixture does not exceed 1 wt. % during the reaction.