发明名称 |
DEVICE AND METHOD FOR CRYSTALLIZING (METH)ACRYLIC ACID |
摘要 |
<p>The objective of the present invention is to provide a crystallization device and a crystallization process for obtaining (meth) acrylic acid with higher purity without causing leakage of a crude solution by preventing complete clogging in a crystallization tube from occurring. The device for crystallizing (meth)acrylic acid according to the present invention is characterized in comprising a crude (meth)acrylic acid solution supply part, a crystallization tube, a heat medium supply tube, a heat medium discharge tube, a storage part of a crude (meth)acrylic acid solution passed through the crystallization tube, a tube for circulating and supplying the crude (meth)acrylic acid solution to the supply part from the storage part, and a pump for circulating and supplying the crude (meth) acrylic acid solution to the supply part from the storage part; and further comprising a pressure meter in the circulate-supply tube; wherein the device is used for carrying out dynamic crystallization in a batch manner by circulating the crude (meth)acrylic acid solution to flow the crude solution downward along the inner wall of the crystallization tube in a coating film-like state.</p> |
申请公布号 |
EP2450340(A1) |
申请公布日期 |
2012.05.09 |
申请号 |
EP20100794063 |
申请日期 |
2010.06.24 |
申请人 |
NIPPON SHOKUBAI CO., LTD. |
发明人 |
SAKAMOTO, KAZUHIKO;UENO, KOJI;ISHII, YOSHITAKE;KITAURA, MASATSUGU |
分类号 |
C07C51/43;B01D9/00;B01D9/02;C07C57/07 |
主分类号 |
C07C51/43 |
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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