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:
Oct. 28, 2010
Applicants:
Takeshi Namekata, Kashima, JP;
Ikuo Ito, Kashima, JP;
Inventors:
Takeshi Namekata, Kashima, JP;
Ikuo Ito, Kashima, JP;
Assignee:
Air Water Inc., Hokkaido, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07C 51/02 (2006.01); C07C 51/43 (2006.01); C07C 51/487 (2006.01); C07C 51/41 (2006.01);
U.S. Cl.
CPC ...
C07C 51/487 (2013.01); C07C 51/02 (2013.01); C07C 51/412 (2013.01); C07C 51/43 (2013.01);
Abstract
The present invention provides a method, as a means for industrially producing a refined 6-bromo-2-naphthalenecarboxylic acid product from a crude 6-bromo-2-naphthalenecarboxylic acid product, comprising: causing the above crude product to react with sodium hydroxide in water to precipitate a sodium salt of 6-bromo-2-naphthalenecarboxylic acid; performing recrystallization treatment for the obtained precipitate; causing the obtained crystal to react with acid in water to precipitate 6-bromo-2-naphthalenecarboxylic acid; and recovering the obtained precipitate.