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:
Mar. 26, 2019
Filed:
Jan. 26, 2016
Applicant:
Nippon Shokubai Co., Ltd., Osaka, JP;
Inventors:
Assignee:
NIPPON SHOKUBAI CO., LTD., Osaka, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B01D 3/26 (2006.01); B01D 3/32 (2006.01); B01D 3/40 (2006.01); C07C 31/20 (2006.01); C07C 51/44 (2006.01); C07C 57/04 (2006.01); C07D 307/60 (2006.01);
U.S. Cl.
CPC ...
C07C 51/44 (2013.01); B01D 3/26 (2013.01); B01D 3/40 (2013.01); C07C 57/04 (2013.01); B01D 3/322 (2013.01); B01D 3/324 (2013.01); C07C 31/202 (2013.01); C07D 307/60 (2013.01);
Abstract
The objective of the present invention is to provide a method for efficiently producing acrylic acid while troubles not only in a waste oil handling after distillation of acrylic acid but also in a purification system of acrylic acid during distillation are reduced. The method for producing acrylic acid according to the present invention is characterized in comprising the step of supplying at least crude acrylic acid and an alcohol solvent to an acrylic acid distillation apparatus to distill acrylic acid, wherein a boiling point of the alcohol solvent is higher than a boiling point of acrylic acid by not lower than 50° C.