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    • 10. 发明公开
    • 아크릴산 및 메타크릴산의 정제 방법
    • 丙烯酸和甲基丙烯酸的方法
    • KR1020000023682A
    • 2000-04-25
    • KR1019997000139
    • 1997-07-09
    • 바스프 에스이
    • 에크,베른트마흐하머,오토프롤,테오슐리파케,폴커뮐러-엥겔,클라우스,요아힘
    • C07C57/04
    • C07C51/43C07C57/04
    • PURPOSE: Provided is a method of producing high purity acrylic acid or methacrylic acid without complex processes such as an additional purification process or adding a help agent CONSTITUTION: Provided is a method of preparing acrylic acid or methacrylic acid by: (a)preparing a gaseous product mixture having essentially the composition of a reaction mixture of catalytic gas-phase oxidation of C3/C4 alkanes, alkenes, alkanols and/or alkanals and/or precursors thereof to form acrylic acid or methacrylic acid, characterized by (b) condensation of the product mixture, (c) crystallization of the acrylic acid or methacrylic acid from the solution obtained in stage (b), (d) extraction of the resulting crystals from the mother liquor, and (e)recirculation of mother liquid remained in stage (d) to stage (c)
    • 目的:提供一种生产高纯度丙烯酸或甲基丙烯酸的方法,不需要复杂的工艺,例如附加的纯化方法或加入助剂。提供:制备丙烯酸或甲基丙烯酸的方法是:(a)制备气态 产物混合物基本上具有C3 / C4烷烃,烯烃,链烷醇和/或链烷烃和/或其前体的催化气相氧化反应混合物的组成,以形成丙烯酸或甲基丙烯酸,其特征在于(b) 产品混合物,(c)从(b)阶段获得的溶液中结晶丙烯酸或甲基丙烯酸,(d)从母液中提取所得结晶,和(e)母液在 )到阶段(c)