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. 19, 1987
Filed:
Jul. 08, 1986
Applicant:
Inventors:
Alan E Goliaszewski, Palmyra, NJ (US);
Richard F Salinaro, Madison, NJ (US);
Assignee:
The Halcon SD Group, Inc., Montvale, NJ (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C07C / ; B01J / ; B01J / ;
U.S. Cl.
CPC ...
260369 ; 502162 ; 502168 ; 502208 ; 502508 ; 502102 ;
Abstract
Anthraquinone is produced by reacting phthalic anhydride with benzene in the liquid phase over a super acid catalyst which may be an oxide of the Group 4b metals zirconium, hafnium, and titanium, or the Group 5b metals niobium, tantalum, and vanadium, preferably zirconium oxide, such oxides being treated with sulfuric acid and calcined. The process may also be applied to substituted equivalents, such as methyl phthalic anhydride and toluene.