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.
申请公布号
US4879412(A)
申请公布日期
1989.11.07
申请号
US19860835737
申请日期
1986.03.03
申请人
MITSUI TOATSU CHEMICALS, INC.;KYOWA GAS CHEMICAL INDUSTRY CO., LTD.