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:
Nov. 01, 1988
Filed:
Jul. 08, 1986
Applicant:
Inventor:
Alan E Goliaszewski, Palmyra, NJ (US);
Assignee:
Montvale Process Company, Inc., Westport, CT (US);
Attorneys:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C07C / ; B01J / ; B01J / ; B01J / ;
U.S. Cl.
CPC ...
260369 ; 502102 ; 502162 ; 502168 ; 502208 ; 502508 ;
Abstract
Anthraquinone is produced by reacting phthalic anhydride in the vapor phase over a catalyst which may be an oxide of the Group 4b metals zirconium, hafnium, and titanium, the Group 5b metals niobium, tantalum, and vanadium, or the rare earths cerium and thorium such oxides, preferably being treated with sulfuric acid and calcined. Substituted anthraquinones may be produced by employing the corresponding substituted phthalic anhydrides.