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. 07, 1978
Filed:
Dec. 08, 1976
Applicant:
Inventors:
Louis G Anello, Hamburg, NY (US);
Morris B Berenbaum, Summit, NJ (US);
James O Peterson, Sylvania, OH (US);
Bernard Sukornick, Williamsville, NY (US);
Allen W Sogn, Williamsville, NY (US);
Assignee:
Buffalo Color Corporation, West Paterson, NJ (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C09B / ;
U.S. Cl.
CPC ...
260370 ; 260686 ;
Abstract
Sulfonation of anthraquinone by a sulfur trioxide component including SO.sub.3 or oleum in a liquid sulfur dioxide solvent. When a mercury catalyst is used to give alpha anthraquinone sulfonate products, most of the mercury is left in the reactor or recovered with unreacted anthraquinone by precipitation with water after vaporization of the sulfur dioxide. High sulfuric acid and mercury pollution are thus avoided.