发明名称 |
Method for producing (meth)acrylic acid |
摘要 |
<p>An object of this invention is to provide a method for producing acrylic acid that enables to suppress adverse influence of byproducts during distillation and to accomplish long-term continuous operation of the acrylic acid production apparatus. This invention is directed to a method for producing (meth)acrylic acid comprising the step of isolating (meth)acrylic acid from a liquid containing (meth)acrylic acid by distillation wherein the liquid contains glyoxal (including its hydrate) in a concentration of 0.1 mass% or less. This is accomplished by separating glyoxal from said liquid by reverse osmosis.</p> |
申请公布号 |
EP1298120(A2) |
申请公布日期 |
2003.04.02 |
申请号 |
EP20020019890 |
申请日期 |
2002.09.10 |
申请人 |
NIPPON SHOKUBAI CO., LTD. |
发明人 |
SAKAMOTO, KAZUHIKO;OHKOUCHI, KAZUO;NAKAE, TOMOHIRO |
分类号 |
C07C51/44;C07C51/25;C07C51/43;C07C51/46;C07C57/07;(IPC1-7):C07C57/07 |
主分类号 |
C07C51/44 |
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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