发明名称 |
Method for producing high-purity caprolactam. |
摘要 |
<p>A method for producing high-purity caprolactam from a mixture comprising a melt of crude caprolactam and water, which comprises cooling the mixture in a crystallizer under a reduced pressure of from 1 to 22 Torr while maintaining the water concentration in the mixture at a level of from 0.5 to 10% by weight, to crystallize highpurity caprolactam, and then separating the resulting crystals.</p> |
申请公布号 |
EP0337323(A2) |
申请公布日期 |
1989.10.18 |
申请号 |
EP19890106200 |
申请日期 |
1989.04.07 |
申请人 |
MITSUBISHI KASEI CORPORATION |
发明人 |
TAN, KAZUO;HIRONAKA, TAKASHI;NAKAMURA, MICHIO |
分类号 |
C07D201/16 |
主分类号 |
C07D201/16 |
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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