发明申请
US20070117997A1 Process for the production of 4,4'-diphenylmethane diisocyanate
审中-公开
生产4,4'-二苯基甲烷二异氰酸酯的方法
- 专利标题： Process for the production of 4,4'-diphenylmethane diisocyanate
- 专利标题（中）： 生产4,4'-二苯基甲烷二异氰酸酯的方法
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申请号： US11599640申请日： 2006-11-15
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公开(公告)号： US20070117997A1公开(公告)日： 2007-05-24
- 发明人: Berthold Keggenhoff , Jeffrey Bolton
- 申请人： Berthold Keggenhoff , Jeffrey Bolton
- 专利权人： Bayer MaterialScience AG
- 当前专利权人： Bayer MaterialScience AG
- 优先权： DE102005055189.0 20051119
- 主分类号： C07C249/00
- IPC分类号： C07C249/00
摘要：
The present invention relates to a process for the production of 4,4′-diphenylmethane diisocyanate (4,4′-MDI) by acid-catalyzed condensation of aniline with formaldehyde, reaction of the mixtures of di- and polyamines obtained with phosgene to form the corresponding mixture of MDI isomers and homologues (di- and polyisocyanates of the diphenylmethane series) and subsequent separation of the mixture by distillation to form 4,4′-MDI and polymeric MDI.
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