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:
Nov. 10, 2015
Filed:
Dec. 05, 2013
Applicant:
Samsung Electronics Co. Ltd., Suwon-si, Gyeonggi-do, KR;
Inventors:
Jun Chwae, Seoul, KR;
Nam Soo Park, Suwon-si, KR;
Moo Ho Lee, Suwon-si, KR;
Jong Won Kim, Yongin-si, KR;
Assignee:
SAMSUNG ELECTRONICS CO., LTD., Suwon-Si, KR;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07C 51/347 (2006.01); C07C 51/377 (2006.01);
U.S. Cl.
CPC ...
C07C 51/347 (2013.01); C07C 51/377 (2013.01);
Abstract
A method for preparing an unsaturated carboxylic acid comprising (a) preparing an aqueous solution comprising an ammonium salt of hydroxycarboxylic acid and a salt of inorganic acid; (b) contacting the aqueous solution with a cation exchange resin to prepare a conversion aqueous solution comprising a hydroxycarboxylic acid and an inorganic acid; and (c) dehydrating the hydroxycarboxylic acid using the inorganic acid as a catalyst is provided.