发明名称 |
PROCESS FOR THE PREPARATION OF .EPSILON.-CAPROLACTAM |
摘要 |
Process to prepare .epsilon.-caprolactam starting from a starting mixture containing a 6-aminocaproate ester, in which in a first step (1) the 6aminocaproate ester is converted into 6-aminocaproic acid and 6aminocaproamide by reaction with water in the presence of ammonia at a temperature of between 50 and 250 ~C, with a separate or simultaneous removal of alcohol(s), and in a subsequent step (2) the 6-aminocaproic acid and 6aminocaproamide are cyclizised at an elevated temperature, wherein in step (1) the 6-aminocaproate ester is converted into 6-aminocaproic acid and 6aminocaproamide in the presence of an amount higher than 2 wt.% and less than or equal to 25 wt.% NH3 (relative to the total amount of organic compounds, water and ammonia present in step (1)).
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申请公布号 |
CA2320901(A1) |
申请公布日期 |
1999.08.26 |
申请号 |
CA19992320901 |
申请日期 |
1999.02.16 |
申请人 |
E.I. DU PONT DE NEMOURS AND COMPANY;DSM N.V. |
发明人 |
GUIT, RUDOLF PHILIPPUS MARIA;LANE, SAMUEL LIVINGSTON |
分类号 |
C07D201/08;(IPC1-7):C07D201/08 |
主分类号 |
C07D201/08 |
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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