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:
Nov. 07, 1989
Filed:
Mar. 03, 1986
Applicant:
Inventors:
Kozo Iwasaki, Yokohama, JP;
Morimasa Kuragano, Osaka, JP;
Minoru Koshibe, Osaka, JP;
Yoshihiro Sezaki, Osaka, JP;
Katsuji Yoguchi, Kitakanbara, JP;
Yoshio Koyama, Osaka, JP;
Assignees:
Mitsui Toatsu Chemicals, Inc., Toyko, JP;
Kyowa Gas Chemical Industry Co., Ltd., Toyko, JP;
Primary Examiner:
Int. Cl.
CPC ...
C07C / ;
U.S. Cl.
CPC ...
562600 ; 562532 ; 562535 ; 562538 ; 562593 ; 203D / ;
Abstract
Disclosed herein is a process for bringing methacrylic acid, which has been obtained by the catalytic oxidation of compound having 4 carbon atoms, into contact with a basic anion-exchange resin so as to remove byproduced dibasic acids and the like from the methacrylic acid and to purify the same.