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:
Jan. 30, 1979
Filed:
Apr. 07, 1978
Applicant:
Inventors:
Eugene R Moore, Midland, MI (US);
Roger L Briggs, Midland, MI (US);
David C McDonald, Midland, MI (US);
Richard Hoffman, Midland, MI (US);
Assignee:
The Dow Chemical Company, Midland, MI (US);
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
C07C / ;
U.S. Cl.
CPC ...
562477 ;
Abstract
Alkali metal salicylate can be efficiently acidified and the salicylic acid product formed contemporaneously sublimed by contacting the salicylate as a solid with gaseous hydrogen chloride at the conditions specified. The temperature of the gaseous hydrogen chloride is controlled so that the heat required to sublime the salicylic acid product is predominantly supplied by the heat of reaction of the hydrogen chloride with the alkali metal salt of the carboxylic acid.