发明名称 |
A process for recovering 1,3-dimethyl-2-imidazolidinone |
摘要 |
The present invention provides a process for recovering 1,3-dimethyl-2-imidazolidinone comprising extracting 1,3-dimethyl-2-imidazolidinone from an aqueous solution containing it with n-butanol in the presence of an inorganic salt to obtain an n-butanol layer and subjecting the n-butanol layer to distillation. <??>As 1,3-dimethyl-2-imidazolidinone can be recovered at high purity from an aqueous solution containing 1,3-dimethyl-2-imidazolidinone easily and efficiently without using alkali, the present process is industrially advantageous. |
申请公布号 |
EP1598342(A1) |
申请公布日期 |
2005.11.23 |
申请号 |
EP20050252996 |
申请日期 |
2005.05.16 |
申请人 |
SUMITOMO CHEMICAL COMPANY, LIMITED |
发明人 |
KATSURA, TADASHI;ARAI, NOBUHIRO;MIZUNO, TADASHI |
分类号 |
C07D233/34;B01D11/04;C07D233/32 |
主分类号 |
C07D233/34 |
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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