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:
Oct. 08, 2002
Filed:
Jun. 16, 2000
Masatoshi Yanagawa, Niigata-ken, JP;
Kazunori Watanabe, Okayama-ken, JP;
Fumio Nakahara, Okayama-ken, JP;
Kuraray Co., Ltd., Kurashiki, JP;
Abstract
A method of producing carboxylic acid and alcohol, that includes: supplying a liquid to a first distillation tower, said liquid including a carboxylic acid ester, and said first distillation tower being operated in a total reflux condition, to obtain a side stream; supplying said side stream to a hydrolysis reactor that includes an acid catalyst to obtain a reaction product liquid that includes a carboxylic acid, an alcohol, water and a carboxylic acid ester; supplying said reaction product liquid to said first distillation tower and removing a first bottom liquid therefrom, said first bottom liquid including a carboxylic acid, an alcohol and water; supplying said first bottom liquid to a second distillation tower and separating said first bottom liquid into a first top distillate that includes an alcohol, and a second bottom liquid that includes a carboxylic acid and water; supplying said second bottom liquid to a third distillation tower and separating said second bottom liquid into a second top distillate that includes a carboxylic acid and water, and a third bottom liquid that includes a carboxylic acid; circulating said second top distillate back to a tower top of said first distillation tower, and adding water to said tower top.