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:
Aug. 18, 1981
Filed:
May. 22, 1980
Applicant:
Inventors:
John K Darin, Naperville, IL (US);
Walter Partenheimer, Naperville, IL (US);
Joseph D Figuly, Munster, IN (US);
Assignee:
Standard Oil Company (Indiana), Chicago, IL (US);
Primary Examiner:
Int. Cl.
CPC ...
B01J / ; B01J / ; C07C / ; C01G / ; C01G / ;
U.S. Cl.
CPC ...
252420 ; 252412 ; 423 50 ; 423140 ; 562414 ; 562485 ; 562486 ;
Abstract
This invention relates to the reclamation of metal oxidation catalysts by water extraction of a high boiling residual mixture remaining after separation of a benzene di- and/or tricarboxylic acid; e.g., the phthalic acids, trimesic acid or trimellitic acid and reaction solvent, if one is used, from the fluid oxidation effluents produced by the catalytic liquid phase oxidation of a xylene, mesitylene, psendocumene or o-xylene and psendocumene with a source of molecular oxygen in the presence or in the absence of a reaction solvent.