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. 25, 2014
Filed:
Jun. 24, 2010
Kazuhiko Sakamoto, Himeji, JP;
Koji Ueno, Himeji, JP;
Yoshitake Ishii, Himeji, JP;
Satoshi Nakagawa, Himeji, JP;
Kazuhiko Sakamoto, Himeji, JP;
Koji Ueno, Himeji, JP;
Yoshitake Ishii, Himeji, JP;
Satoshi Nakagawa, Himeji, JP;
Nippon Shokubai Co., Ltd., Osaka, JP;
Abstract
The objective of the present invention is to provide a process for production of (meth)acrylic acid with improved production efficiency by efficiently shifting from heating procedure to cooling procedure for a crystallizer. A process for production of (meth)acrylic acid according to the present invention is characterized in comprising the steps of crystallizing (meth)acrylic acid from a crude (meth)acrylic acid solution by using a batch type crystallizer, and melting the obtained (meth)acrylic acid crystal to obtain a (meth)acrylic acid melted liquid; wherein preliminary cooling of the crystallizer for the next crystallization step is started during transferring the (meth)acrylic acid melted liquid from the crystallizer.