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:
Mar. 13, 1990
Filed:
Feb. 16, 1988
Applicant:
Inventors:
Hans Leuck, Troisdorf, DE;
Hans-Jorg Westermann, Troisdorf, DE;
Assignee:
Huels Troisdorf AG, Cologne, DE;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C07C / ; C07C / ;
U.S. Cl.
CPC ...
560 77 ; 562414 ; 422140 ;
Abstract
Disclosed is a method for the production of benzene carboxylic acids and benzene carboxylic acid esters or their mixtures, while p-toloylic acid is made from p-xylene and terephthalic acid monomethyl ester is simultaneously prepared from p-toluylic acid ester. The oxidation is performed by the addition of oxidator liquid and gases containing oxygen in single orifice mixing nozzles with the formation of a highly disperse reaction phase and the single orifice mixing nozzles open into the oxidator liquid.