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    • 10. 发明申请
    • Method for producing (meth)acrylic acid
    • (甲基)丙烯酸的制造方法
    • US20070055079A1
    • 2007-03-08
    • US11508247
    • 2006-08-23
    • Shuhei YadaKenji TakasakiYoshiro SuzukiYasushi Ogawa
    • Shuhei YadaKenji TakasakiYoshiro SuzukiYasushi Ogawa
    • C07C51/42
    • C07C51/46C07C57/04
    • The present invention provides a method for suppressing an undesirable polymerization reaction of (meth)acrylic acid in a purification step for producing (meth)acrylic acid and for avoiding troubles due to clogging of devices or the like, to thereby attain a stable continuous operation. The present invention provides a method for producing (meth)acrylic acid comprising: distilling a water-containing liquid of (meth)acrylic acid containing (meth)acrylic acid and water by using a distillation column in the presence of an azeotropic solvent boiling together with at least water to remove water from the water-containing liquid of (meth)acrylic acid through azeotropy with the azeotropic solvent, in which the water-containing liquid of (meth)acrylic acid is distilled in the presence of the azeotropic solvent after distillation by the azeotropic solvent is carried out in the distillation column.
    • 本发明提供一种抑制(甲基)丙烯酸在制造(甲基)丙烯酸的纯化步骤中不期望的聚合反应的方法,并且避免了由于装置等的堵塞而引起的麻烦,从而获得稳定的连续操作。 本发明提供一种(甲基)丙烯酸的制造方法,其特征在于,在与共沸溶剂一起沸腾的共沸溶剂的存在下,使用蒸馏塔,蒸馏含(甲基)丙烯酸和水的(甲基)丙烯酸的含水液体, 至少要通过与共沸溶剂共沸以从(甲基)丙烯酸的含水液体中除去水,其中(甲基)丙烯酸的含水液体在蒸馏后在共沸溶剂存在下被蒸馏, 共沸溶剂在蒸馏塔中进行。