发明名称 |
METHOD OF OBTAINING CAPROLACTAM BY HYDROLYTIC SPLITTING OF MOLTEN POLYCAPROLACTAM. |
摘要 |
<p>Disclosed is a method of obtaining caprolactam from polymers containing caprolactam in the presence of superheated water. The proposed method is based on the use of polymers containing the repeating unit -[-N(H)-(CH2)5-C(O)-]- or mixtures consisting essentially of: 40-99.99 wt.percent of a polymer containing the repeating unit -[-N(H)-(CH2)5-C(O)-]-;0.01-50 wt.percent of additives selected from the group consisting of inorganic fillers, organic and inorganic pigments and dyes; 0-10 wt.percent of organic and/or inorganic additives; 0-40 wt.percent of polymers which do not contain polyamide; 0-60 wt.percent of polyamides with the exception of polycaprolactam and copolyamides based on caprolactam. These polymers or mixtures are brought into contact with superheated water at a temperature of 280-320 temperature C and at a pressure of 7.5-15 Mpa, the weight ratio of water to the polymer containing the repeating unit -[-N(H)-(CH2)5-C(O)-]- being between 5:1 and 13:1 and the reaction time less than 3 hours. The reaction mixture consisting essentially of water and the polymers or mixture indicated above should contain no gaseous phase under the conditions of hydrolysis.</p> |
申请公布号 |
MX9704285(A) |
申请公布日期 |
1997.09.30 |
申请号 |
MX19970004285 |
申请日期 |
1995.12.01 |
申请人 |
BASF AKTIENGESELLSCHAFT |
发明人 |
PETER BASSLER;MICHAEL KOEPIETZ |
分类号 |
B03B9/06;C07D201/12;C08J11/14;(IPC1-7):C07D201/12 |
主分类号 |
B03B9/06 |
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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