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:
Jul. 22, 1980
Filed:
Nov. 30, 1978
Applicant:
Inventors:
John A Garman, West Lafayette, IN (US);
Rastko I Mamuzio, West Lafayette, IN (US);
Assignee:
Great Lakes Chemical Corporation, West Lafayette, IN (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07C / ;
U.S. Cl.
CPC ...
568639 ; 260 / ; 252-81 ;
Abstract
Crude halogenated organic products, especially products consisting of partially halogenated diphenyl ethers alone or in admixture with other materials may be purified by contacting the crude brominated product with a finely divided basic solid such as a carbonate or bicarbonate of an alkali metal or ammonia for a time and at a temperature sufficient to enhance the purity thereof. The purification step may be performed in the presence of an organic solvent or by adding the basic solid directly to molten crude products in the presence of a small amount of water.