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:
Jun. 03, 2008
Filed:
Jan. 19, 2007
Applicants:
Koji Ueno, Himeji, JP;
Yoshitake Ishii, Himeji, JP;
Inventors:
Koji Ueno, Himeji, JP;
Yoshitake Ishii, Himeji, JP;
Assignee:
Nippon Shokubai Co., Ltd., Osaka, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07C 51/42 (2006.01); C07C 57/02 (2006.01);
U.S. Cl.
CPC ...
Abstract
The objective of the present invention is to provide method for acrylic acid in which a generation of polymerized substance is prevented while acrylic acid is stored in a storage tank. A method of the present invention for producing acrylic acid, comprising storing acrylic acid in a storage tank, wherein a process liquid containing 50 mass % or more of acrylic acid is subjected to at least one filtering operation at 15 to 70° C. when the process liquid is supplied to the storage tank.