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:
Dec. 23, 1980
Filed:
Dec. 28, 1978
Applicant:
Inventors:
Shikiho Itaya, Ohtake, JP;
Takenori Nagaoka, Iwakuni, JP;
Teruo Itoh, Iwakuni, JP;
Yukimasa Shigemura, Ohtake, JP;
Shigemi Shiraki, Iwakuni, JP;
Assignee:
Mitsui Petrochemical Industries, Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07C / ;
U.S. Cl.
CPC ...
562414 ; 562416 ; 562485 ;
Abstract
Improved process for producing terephthalic acid by liquid-phase catalytic oxidation of p-xylene with oxygen at a temperature of at least about 160.degree. C. and a pressure of at least about 5 kg/cm.sup.2 G under specific recycling condition of the mother liquor, which comprises