发明名称 |
PROCESS TO PREPARE 5-FORMYLVALERIC ACID |
摘要 |
Process to separate linear 5-formylvaleric acid from a mixture of 5- and 3and 4-formylvaleric acids, wherein the separation is performed by fractional extraction with two immiscible solvents of which one solvent is an aqueous solvent and the other solvent is an organic solvent, in which the organic solvent has a higher or lower affinity for 5-formylvaleric acid than its affinity for the 3-formylvaleric acids and for the 4-formylvaleric acid. Furthermore the invention relates to an improved process to prepare .epsilon.caprolactam starting from a mixture of branched and linear formylvaleric acids or starting from pentenoic acid.
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申请公布号 |
CA2226150(A1) |
申请公布日期 |
1997.01.23 |
申请号 |
CA19962226150 |
申请日期 |
1996.06.26 |
申请人 |
DSM N.V.;E.I. DU PONT DE NEMOURS AND COMPANY |
发明人 |
NIEMANN, SIMON HANS;SIMONS, ANTONIUS JACOBUS FRANCISCUS;GUIT, RUDOLF PHILIPPUS MARIA;TOTH, IMRE;GELLING, ONKO JAN |
分类号 |
C07C51/48;C07C59/147;C07D221/08;(IPC1-7):C07C59/147;C07D201/08;C07D223/10 |
主分类号 |
C07C51/48 |
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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