公开(公告)号：US06452040B2

公开(公告)日：2002-09-17

申请号：US09779205

申请日：2001-02-08

申请人： Yasuhiro Shingai ,  Sei Nakahara ,  Yukihiro Yoneda ,  Masakazu Asami ,  Masatoshi Ueoka

发明人： Yasuhiro Shingai ,  Sei Nakahara ,  Yukihiro Yoneda ,  Masakazu Asami ,  Masatoshi Ueoka

IPC分类号： C07C6726

CPC分类号： C07C67/26 ,  C07C69/54

摘要： The present invention provides a production process for a hydroxyalkyl (meth)acrylate which process enables to maintain the oxygen concentration of a gas phase portion of a reactor within a specific low concentration range in any stage of before adding raw materials, during the reaction, and after the reaction. The production process comprises the step of carrying out a reaction between (meth)acrylic acid and an alkylene oxide in the presence of a catalyst in order to produce the hydroxyalkyl (meth)acrylate, wherein an inert gas and/or a mixed gas of oxygen and an inert gas with a beforehand adjusted oxygen concentration of 0.1 to 14 vol % is used to maintain the oxygen concentration of a gas phase portion of a reactor in the range of 0.1 to 14 vol % (1) before adding the alkylene oxide or (2) during the above reaction or (3) between the completion of the above reaction and the charge for the next reaction. In addition, another production process comprises the step of carrying out a reaction between (meth)acrylic acid and an alkylene oxide in the presence of a catalyst in order to produce the hydroxyalkyl (meth)acrylate, wherein the oxygen concentration of a gas phase portion of a reactor is maintained in the range of 0.1 to 14 vol % throughout the production steps.

摘要翻译： 本发明提供一种（甲基）丙烯酸羟烷基酯的制备方法，该方法能够在反应期间在添加原料之前的任何阶段将反应器的气相部分的氧浓度保持在特定的低浓度范围内，以及 反应后。 该制备方法包括在催化剂存在下进行（甲基）丙烯酸和烯化氧之间的反应以制备（甲基）丙烯酸羟烷基酯的步骤，其中惰性气体和/或氧气的混合气体 使用事先调节氧浓度为0.1〜14体积％的惰性气体，在加入环氧烷之前将反应器的气相部分的氧浓度维持在0.1〜14体积％（1）的范围内，或（ 2）在上述反应期间或（3）完成上述反应和下一反应的电荷之间。 此外，另一种制备方法包括在催化剂存在下进行（甲基）丙烯酸和烯化氧之间的反应以制备（甲基）丙烯酸羟烷基酯的步骤，其中气相部分的氧浓度 的反应器在整个生产步骤中保持在0.1至14体积％的范围内。