发明名称 Preparation of Both Hexamethylene Diamine and Aminocapronitrile
摘要 Hexamethylenediamine and aminocapronitrile are simultaneoussly produced by hemihydrogenation of adiponitrile, which includes a stage of separation of the hexamethylenediamine from the hydrogenate by distillation of the hexamethylenediamine, the distillation of the hexamethylenediamine being carried out from the hydrogenate containing a free acid and/or an alkali metal or ammonium acid salt, whereby a top fraction A recovered at the column top of the stage of distillation of the hexamethylenediamine is essentially crude hexamethylenediamine and a small amount of THA; the amount of THA (tetrahydroazepine) present in the crude hexamethylenediamine constitutes a small proportion of the THA present in the hydrogenate.
申请公布号 US2008319220(A1) 申请公布日期 2008.12.25
申请号 US20060090125 申请日期 2006.10.16
申请人 RHODIA OPERATIONS 发明人 LECONTE PHILIPPE
分类号 C07C255/01;C07C209/48 主分类号 C07C255/01
代理机构 代理人
主权项
地址