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:
May. 04, 2010
Filed:
May. 06, 2006
Applicants:
Gian Luca Castiglioni, Trescore Balneario, IT;
Roberto Pirola, Dalmine, IT;
Carlo Fumagalli, Albano Sant'Alessandro, IT;
Inventors:
Gian Luca Castiglioni, Trescore Balneario, IT;
Roberto Pirola, Dalmine, IT;
Carlo Fumagalli, Albano Sant'Alessandro, IT;
Assignee:
Polynt S.p.A., Scanzorosciate, IT;
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
C07C 51/255 (2006.01);
U.S. Cl.
CPC ...
Abstract
Trimellitic acid is produced by oxidation of pseudocumene in acetic acid at temperatures between 130 and 240° C. in the presence of a catalyst composition containing cobalt, manganese and bromine. The process comprises the stages of: There is no supplementation of catalyst after stage (i).