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. 27, 1981
Filed:
Mar. 24, 1980
Applicant:
Inventors:
Assignee:
Mitsubishi Gas Chemical Co. Inc., Tokyo, JP;
Primary Examiner:
Int. Cl.
CPC ...
C07C / ;
U.S. Cl.
CPC ...
562416 ;
Abstract
Terephthalic acid with a high purity for direct polymerization with glycols is produced by oxidizing p-tolualdehyde with a gas containing molecular oxygen in water as a solvent in the presence of bromine ions in an oxidation reactor using zirconium as a reactor material.