发明名称 |
(METH)ACRYLIC ACID PRODUCTION METHOD, AND, HYDROPHILIC RESIN PRODUCTION METHOD |
摘要 |
The present invention provides a method for producing (meth)acrylic acid, which achieves enhanced productivity or a reduced amount of a catalyst in production of (meth)acrylic acid from 3-hydroxycarboxylic acid, and enables stable production of (meth)acrylic acid at low cost. The method is a method for producing (meth)acrylic acid using 3-hydroxycarboxylic acid as a starting material, the method including a polymerization step of polymerizing 3-hydroxycarboxylic acid to generate a composition containing a 3-hydroxycarboxylic acid polymer, and a step of generating (meth)acrylic acid from the composition containing the 3-hydroxycarboxylic acid polymer, the 3-hydroxycarboxylic acid polymer obtained in the polymerization step including trimer or higher order units, the trimer or higher order units constituting 3% by mass or more of a total of 100% by mass of the 3-hydroxycarboxylic acid and the 3-hydroxycarboxylic acid polymer. |
申请公布号 |
US2015175517(A1) |
申请公布日期 |
2015.06.25 |
申请号 |
US201314409349 |
申请日期 |
2013.06.21 |
申请人 |
NIPPON SHOKUBAI CO., LTD. |
发明人 |
Yoshida Hiroshi;Kamei Hisashi;Haginiwa Naomichi |
分类号 |
C07C51/377;C08G63/06;C08F20/06;C07C51/353;C12P7/40 |
主分类号 |
C07C51/377 |
代理机构 |
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代理人 |
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主权项 |
1. A method for producing (meth)acrylic acid using 3-hydroxycarboxylic acid as a starting material, the method comprising
a polymerization step of polymerizing 3-hydroxycarboxylic acid to generate a composition containing a 3-hydroxycarboxylic acid polymer, and a step of generating (meth)acrylic acid from the composition containing the 3-hydroxycarboxylic acid polymer, the 3-hydroxycarboxylic acid polymer obtained in the polymerization step including trimer or higher order units, the trimer or higher order units constituting 3% by mass or more of a total of 100% by mass of the 3-hydroxycarboxylic acid and the 3-hydroxycarboxylic acid polymer. |
地址 |
Osaka-shi, Osaka JP |