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:
Dec. 14, 1976
Filed:
Nov. 05, 1974
Applicant:
Inventors:
Harry E Buckholtz, Kenmore, NY (US);
Arun C Bose, Niagara Falls, NY (US);
Assignee:
Hooker Chemicals & Plastics Corporation, Niagara Falls, NY (US);
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C07D / ;
U.S. Cl.
CPC ...
2603 / ;
Abstract
Thianthrene is prepared by adding sulfur monochloride to an excess of benzene in the presence of aluminum chloride, and reacting at a temperature of 60.degree. to 80.degree. C to form thianthrene as an insoluble thianthrene-aluminum chloride complex; separating the complex by filtration, slurrying the complex in an inert organic liquid; treating the slurry with a Lewis base, such as ammonia to free the thianthrene from the complex and recovering a relatively high purity thianthrene product.