发明名称 |
Method of purifying N-(2-hydroxyethy)-2- pyrrolidone |
摘要 |
A method for obtaining high purity N-(2-hydroxyethyl)-2-pyrrolidone satisfactory for use as an intermediate material for N-vinyl-2-pyrrolidone from a reaction liquid formed of a reaction between y-butyrolactone and 2-aminoethanol, i.e., a liquid containing N-(2-hydroxyethyl)-2-pyrrolidone, compounds having boiling points lower than that of N-(2-hydroxyethyl)-2-pyrrolidone and compounds having boiling points higher than that of N-(2-hydroxyethyl)-2-pyrrolidone. The method is characterized by distilling said reaction liquid using a distillation column, whereby obtaining a liquid containing the compounds having the lower boiling points than that of N-(2-hydroxyethyl)-2-pyrrolidone and N-(2-hydroxyethyl)-2-pyrrolidone as a distillate liquid from the column top and a liquid containing compounds having boiling points higher than that of N-(2-hydroxyethyl)-2-pyrrolidone as a bottom liquid.
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申请公布号 |
US2002139657(A1) |
申请公布日期 |
2002.10.03 |
申请号 |
US20020105447 |
申请日期 |
2002.03.26 |
申请人 |
NIPPON SHOKUBAI CO., LTD. |
发明人 |
UGAMURA SHUKICHI;SUGIURA HIDETO;YANO HITOSHI |
分类号 |
C07D207/26;C07D207/27;(IPC1-7):B01D3/10 |
主分类号 |
C07D207/26 |
代理机构 |
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主权项 |
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地址 |
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