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. 27, 2015
Filed:
Jun. 20, 2008
Applicants:
Makoto Okamoto, Tokyo, JP;
Hideki Date, Tokyo, JP;
Inventors:
Makoto Okamoto, Tokyo, JP;
Hideki Date, Tokyo, JP;
Assignee:
Asahi Kasei Chemicals Corporation, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07C 51/42 (2006.01); C08G 63/08 (2006.01); C07C 51/02 (2006.01); C07C 51/41 (2006.01); C07D 319/12 (2006.01); C12P 7/42 (2006.01);
U.S. Cl.
CPC ...
C08G 63/08 (2013.01); C07C 51/02 (2013.01); C07C 51/412 (2013.01); C07D 319/12 (2013.01); C12P 7/42 (2013.01);
Abstract
An object of the present invention is to provide a production process of an α-hydroxy acid having a sufficient quality as a polymer raw material, which process does not produce a large amount of waste as a byproduct and is economical. The present invention provides a production process of an α-hydroxy acid having a step of adding a basic metal to an α-hydroxy acid ammonium salt to yield an α-hydroxy acid metal salt and a step of desalting the α-hydroxy acid metal salt to yield the α-hydroxy acid.