发明授权
- 专利标题： Process for the preparation of polyamines of the diphenylmethane series at a low degree of protonation
- 专利标题（中）： 在低质子化程度下制备二苯基甲烷系列的多胺的方法
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申请号： US11170624申请日： 2005-06-29
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公开(公告)号： US07253321B2公开(公告)日： 2007-08-07
- 发明人: Torsten Hagen , Daniel Koch , Hans-Georg Pirkl , Fritz Pohl , Stefan Wershofen , Rudolf Uchdorf , Richard Adamson
- 申请人： Torsten Hagen , Daniel Koch , Hans-Georg Pirkl , Fritz Pohl , Stefan Wershofen , Rudolf Uchdorf , Richard Adamson
- 申请人地址： DE Leverkusen
- 专利权人： Bayer MaterialScience AG
- 当前专利权人： Bayer MaterialScience AG
- 当前专利权人地址： DE Leverkusen
- 代理商 Joseph C. Gil; Lyndanne M. Whalen; N. Denise Brown
- 优先权： DE102004032416 20040705
- 主分类号： C07C209/78
- IPC分类号： C07C209/78
摘要：
The invention provides a process for the preparation of polyamines of the diphenylmethane series. This process comprises a) reacting aniline and formaldehyde in a molar ratio of 1.5:1 to 6:1, in the presence of an acid catalyst at temperatures of 20° C. to 100° C., in which the water content in the acid reaction mixture is
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