发明申请
- 专利标题: Method for reducing the content of an unsaturated amine in a mixture containing an amino nitrile, a diamine, a dinitrile or mixtures thereof
- 专利标题(中): 降低含氨基腈,二胺,二腈或其混合物的混合物中不饱和胺含量的方法
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申请号: US10515281申请日: 2003-05-21
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公开(公告)号: US20050222449A1公开(公告)日: 2005-10-06
- 发明人: Stefan Maixner , Christoph Benisch , Hermann Luyken , Peter Bassler , Rolf-Hartmuth Fischer , Johann-Peter Melder , Andreas Ansmann
- 申请人: Stefan Maixner , Christoph Benisch , Hermann Luyken , Peter Bassler , Rolf-Hartmuth Fischer , Johann-Peter Melder , Andreas Ansmann
- 优先权: DE10223827.8 20020528
- 国际申请: PCT/EP03/05313 WO 20030521
- 主分类号: C07C209/84
- IPC分类号: C07C209/84 ; C07C211/09 ; C07C211/12 ; C07C253/34 ; C07C255/09 ; C07C255/24
摘要:
A process for reducing the level of an aliphatic monounsaturated amine (IV) in a mixture (V) containing an aminonitrile (I) or a diamine (II) or a dinitrile (III) or mixtures thereof as well as said amine (IV) by a) reacting said mixture (V) with an anionic nucleophile (VI) which contains a nucleophilic atom selected from the group consisting of oxygen, nitrogen and sulfur, which is capable of taking up an H+ ion to form an acid having a pKa value in the range from 7 to 11, as measured in water at 25° C., and which has a relative nucleophilicity, as measured in methyl perchlorate/methanol at 25° C., in the range from 3.4 to 4.7 when said nucleophilic atom is oxygen, in the range from 4.5 to 5.8 when said nucleophilic atom is nitrogen, and in the range from 5.5 to 6.8 when said nucleophilic atom is sulfur, in an amount in the range from 0.01 to 10 mol per mole of said amine (IV) in said mixture (V) at a temperature in the range from 50 to 200° C. to obtain a mixture (VII), b) distilling said aminonitrile (I) or said diamine (II) or said dinitrile (III) or mixtures thereof from said mixture (VII) at a temperature in the range from 50 to 200° C. and at a pressure in the range from 0.1 to 100 kPa to obtain a bottom product (VIII), which comprises c) distilling an aminonitrile (I) or diamine (II) or dinitrile (III) or mixtures thereof from said bottom product (VIII) at a temperature which is lower than that chosen in step b).