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:
Jul. 28, 1981
Filed:
Feb. 08, 1980
Makoto Komatsu, Kurashiki, JP;
Toru Tanaka, Kurashiki, JP;
Mitsubishi Gas Chemical Company, Inc., Tokyo, JP;
Abstract
Terephthalic acid with a high purity and high whiteness is produced by oxidizing p-tolualdehyde with molecular oxygen such as air in the presence of a heavy metal catalyst of manganese and/or cerium, a bromine compound, and a mineral acid in water as a solvent at a bromine compound concentration of 0.5-12% by weight on the basis of the reaction solution in terms of bromine ions and at a ratio of g-equivalents of hydrogen ions of the mineral acid to sum total of g-equivalents of the hydrogen ions and manganese and/or cerium ions of 1-85% and at a ratio of sum total of g-equivalents of the hydrogen ions and manganese and/or cerium ions to g-equivalents of bromine ions of 0.5-5. Terephthalic acid thus produced is directly polymerizable with glycols without any purification.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile