发明名称 |
Washing method for distillation system of nitrogen-containing polymerizable monomers |
摘要 |
There is provided a method of efficiently removing polymer stuck to the inside and/or on the surface of packings of a distillation tower, when nitrogen-containing polymerizable monomers (for example, ethyleneimine) are distilled. Said method consists of washing the inside and/or packings of a distillation tower with an acidic liquid (for example, aqueous solution of acetic acid).
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申请公布号 |
US6550485(B2) |
申请公布日期 |
2003.04.22 |
申请号 |
US20010956895 |
申请日期 |
2001.09.21 |
申请人 |
NIPPON SHOKUBAI CO., LTD. |
发明人 |
OKA YOSHIHISA;TAKEMATSU KENICHI |
分类号 |
C07D203/02;B01D3/00;B01D3/32;C07D203/08;C11D7/08;C11D7/26;C11D7/34;C11D7/36;(IPC1-7):B08B9/00 |
主分类号 |
C07D203/02 |
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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