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:
May. 12, 2015
Filed:
Dec. 28, 2011
Applicants:
Hiroshi Yoshida, Osaka, JP;
Hisashi Kamei, Osaka, JP;
Inventors:
Hiroshi Yoshida, Osaka, JP;
Hisashi Kamei, Osaka, JP;
Assignee:
Nippon Shokubai Co., Ltd., Osaka, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C07C 53/00 (2006.01); C07C 51/377 (2006.01); C07C 51/347 (2006.01); C07C 51/44 (2006.01); C08F 2/00 (2006.01); C08F 120/06 (2006.01); C12P 7/42 (2006.01);
U.S. Cl.
CPC ...
C07C 51/377 (2013.01); C07C 51/347 (2013.01); C07C 51/44 (2013.01); C08F 2/00 (2013.01); C12P 7/42 (2013.01); C08F 120/06 (2013.01);
Abstract
A method for producing acrylic acid and/or an ester thereof from a raw material composition containing hydroxypropionic acid and/or an ester thereof, the method including the steps of: (a) evaporating the raw material composition; and (b) dehydrating the evaporated raw material composition by contact with a dehydration catalyst, wherein the total amount of hydroxypropionic acid and/or an ester thereof supplied in the step (b) is controlled to be 70% by mass or more based on 100% by mass of the total amount of hydroxypropionic acid and/or an ester thereof supplied in the step (a).