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:
Feb. 19, 1985
Filed:
Jan. 03, 1983
Applicant:
Inventors:
Toru Tanaka, Kurashiki, JP;
Masanori Hataya, Kurashiki, JP;
Kazuo Tanaka, Kurashiki, JP;
Yukio Sakai, Kurashiki, JP;
Yasufumi Hamada, Kurashiki, JP;
Assignee:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C07C / ; C07C / ;
U.S. Cl.
CPC ...
562416 ; 422240 ; 422241 ;
Abstract
An aromatic polycarboxylic acid is produced by oxidation of an alkyl-substituted aromatic aldehyde or carboxyLic acid with molecular oxygen in water as a solvent in the presence of bromine ions or further together with heavy metal ions as a catalyst in a reactor using a zirconium material whose surface is coated with an oxide layer as a material of construction. The oxidation can be carried out in high yield without corrosion of the material of construction.