发明名称 |
production process for hydroxyalkyl (meth)acrylate |
摘要 |
A production process for a hydroxyalkyl (meth)acrylate, which comprises the steps of carrying out a reaction between (meth)acrylic acid and an alkylene oxide and stripping the unreacted residue of the alkylene oxide from the resultant reaction liquid, wherein: (1) the stripping step is performed by use of an inert gas, and the concentration of oxygen in the inert gas is adjusted in the range of 0.1 to 5 mol %; (2) the concentration of the unreacted residue of the (meth)acrylic acid in the resultant reaction liquid is suppressed to not higher than 10 weight %; (3) the difference in operational pressure between the stripping step and the absorption step of causing a solvent to absorb the stripped alkylene oxide is suppressed to not more than 1,000 hPa; (4) the reaction liquid resultant from the reaction is directly supplied to the stripping step without being heated; (5) a part of the liquid left behind in the stripping step is heated and then supplied to the stripping step again; (6) a hydroxyalkyl (meth)acrylate solution is used as the absorbing solvent; (7) a part of the liquid resultant from the absorption step is cooled and then supplied to the absorption step again; or (8) a part or the whole of the absorbing liquid which is on the way of the absorption step is extracted and then cooled and then supplied to the absorption step again. |
申请公布号 |
EP1090903(A3) |
申请公布日期 |
2003.04.16 |
申请号 |
EP20000119915 |
申请日期 |
2000.09.13 |
申请人 |
NIPPON SHOKUBAI CO., LTD. |
发明人 |
MATSUMOTO, HAJIME;ISHIDA, TOKUMASA;SHINGAI, YASUHIRO;UEOKA, MASATOSHI;YONEDA, YUKIHIRO |
分类号 |
C07C67/24;C07C67/26 |
主分类号 |
C07C67/24 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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