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:
Oct. 16, 1979
Filed:
Feb. 22, 1978
Applicant:
Inventors:
Eugene R Moore, Midland, MI (US);
David C McDonald, Midland, MI (US);
Joseph Willner, Midland, MI (US);
Roger L Briggs, Midland, MI (US);
Assignee:
The Dow Chemical Company, Midland, MI (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07C / ;
U.S. Cl.
CPC ...
562406 ; 562477 ;
Abstract
A dry alkali metal phenate can be more efficiently carbonated with carbon dioxide under pressure to an alkali metal carboxylate of a phenol, if the phenate is finely divided and the temperature during carbonation is maintained below about 135.degree. C. until at least about 25 mole percent of the carbon dioxide theoretically necessary to achieve complete carbonation is absorbed by the phenate. This method of carbonation is particularly useful to produce the sodium salt of salicylic acid.