公开(公告)号：US08278481B2

公开(公告)日：2012-10-02

申请号：US12451701

申请日：2008-05-15

申请人： Kazuhiko Sakamoto ,  Naoki Serata ,  Toyofumi Sakai

发明人： Kazuhiko Sakamoto ,  Naoki Serata ,  Toyofumi Sakai

IPC分类号： C07C57/02

CPC分类号： C07C51/252 ,  C07C51/412 ,  C07C51/50 ,  C07C57/04 ,  C07C53/10

摘要： The present invention provides a method for effectively preventing the precipitation related to manganese acetate in the pipe for sending a polymerization inhibitor and the like, and the polymerization of (meth)acrylic acid. A first method of the present invention for producing (meth)acrylic acid, characterized in comprising steps of: producing a (meth)acrylic acid-containing gas by catalytic vapor phase oxidation reaction; and obtaining a (meth)acrylic acid-containing fluid by providing the (meth)acrylic acid-containing gas into a condensation column or an absorption column; wherein manganese acetate is used as a polymerization inhibitor; manganese acetate is dissolved into a (meth)acrylic acid aqueous solution containing not more than 10% by mass of (meth)acrylic acid, and the like, to obtain a manganese acetate aqueous solution; and the manganese acetate aqueous solution is provided into the condensation column or the absorption column.

摘要翻译： 本发明提供了一种用于有效地防止用于发送阻聚剂等的管中的醋酸锰沉淀和（甲基）丙烯酸聚合的方法。 本发明的制备（甲基）丙烯酸的第一种方法，其特征在于包括以下步骤：通过催化气相氧化反应制备（甲基）丙烯酸的气体; 并通过将（甲基）丙烯酸的气体提供到缩合塔或吸收塔中来获得含（甲基）丙烯酸的流体; 其中使用乙酸锰作为阻聚剂; 将乙酸锰溶解于含有不超过10质量％的（甲基）丙烯酸等的（甲基）丙烯酸水溶液中，得到乙酸锰水溶液; 并且将乙酸锰水溶液提供到缩合塔或吸收塔中。

公开(公告)号：US07368602B2

公开(公告)日：2008-05-06

申请号：US11655113

申请日：2007-01-19

申请人： Toyofumi Sakai ,  Naoki Serata

发明人： Toyofumi Sakai ,  Naoki Serata

IPC分类号： C07C51/42

CPC分类号： C07C51/43 ,  C07C51/252 ,  C07C51/44 ,  C07C57/04

摘要： There is provided a process for producing (meth)acrylic acid including an absorption step of bringing a (meth)acrylic acid-containing gas obtained by a gas phase catalytic oxidation method into an absorption tower and allowing the gas to contact with an absorbent, in which absorption step a crude (meth)acrylic acid solution is withdrawn from a withdrawal outlet positioned between a supply point for the (meth)acrylic acid-containing gas and a supply point for the absorbent on the absorption tower, and then supplied to a next step. The process for producing (meth)acrylic acid makes it possible to suppress the formation of Michael adducts, thereby obtaining a (meth)acrylic acid containing solution in high yield and in high concentration.

摘要翻译： 提供了一种生产（甲基）丙烯酸的方法，其包括将通过气相催化氧化方法获得的含（甲基）丙烯酸的气体引入吸收塔并使气体与吸收剂接触的吸收步骤， 该吸收步骤将粗（（甲基）丙烯酸溶液从位于含（甲基）丙烯酸的气体的供应点和吸收塔上的吸收剂的供应点之间的取出口取出，然后供给下一个 步。 制备（甲基）丙烯酸的方法可以抑制迈克尔加合物的形成，从而以高产率和高浓度获得含（甲基）丙烯酸的溶液。

公开(公告)号：US20070173667A1

公开(公告)日：2007-07-26

申请号：US11655113

申请日：2007-01-19

申请人： Toyofumi Sakai ,  Naoki Serata

发明人： Toyofumi Sakai ,  Naoki Serata

IPC分类号： C07C51/42

CPC分类号： C07C51/43 ,  C07C51/252 ,  C07C51/44 ,  C07C57/04

摘要： There is provided a process for producing (meth)acrylic acid including an absorption step of bringing a (meth)acrylic acid-containing gas obtained by a gas phase catalytic oxidation method into an absorption tower and allowing the gas to contact with an absorbent, in which absorption step a crude (meth)acrylic acid solution is withdrawn from a withdrawal outlet positioned between a supply point for the (meth)acrylic acid-containing gas and a supply point for the absorbent on the absorption tower, and then supplied to a next step. The process for producing (meth)acrylic acid makes it possible to suppress the formation of Michael adducts, thereby obtaining a (meth)acrylic acid containing solution in high yield and in high concentration.

摘要翻译： 提供了一种生产（甲基）丙烯酸的方法，其包括将通过气相催化氧化方法获得的含（甲基）丙烯酸的气体引入吸收塔并使气体与吸收剂接触的吸收步骤， 该吸收步骤将粗（（甲基）丙烯酸溶液从位于含（甲基）丙烯酸的气体的供应点和吸收塔上的吸收剂的供应点之间的取出口取出，然后供给下一个 步。 制备（甲基）丙烯酸的方法可以抑制迈克尔加合物的形成，从而以高产率和高浓度获得含（甲基）丙烯酸的溶液。