申请人:NITTO KAGAKU KOGYO KABUSHIKI KAISHA
公开号:EP0744395A1
公开(公告)日:1996-11-27
To develop a zeolite catalyst which can prevent the drastic lowering of dimethylamine selectivity to be caused in the production of dimethylamine using a zeolite catalyst when the conversion of methanol is high, and which can give higher dimethylamine selectivity and lower trimethylamine selectivity as well as higher methanol-consuming reaction activity; and to provide a process for producing dimethylamine with high selectivity, using the catalyst.
A process for producing dimethylamine by allowing methanol, or methanol and a methylamine mixture, or a methylamine mixture to react with ammonia in the gaseous phase in the presence of a catalyst, characterized in that a modified zeolite prepared by treating a zeolite with a solution containing a chelating agent is used as the catalyst.
开发一种沸石催化剂,该催化剂可以防止在使用沸石催化剂生产二甲胺的过程中,当甲醇转化率较高时导致二甲胺选择性急剧下降,并且可以获得较高的二甲胺选择性和较低的三甲胺选择性以及较高的消耗甲醇的反应活性;以及提供一种使用该催化剂生产具有高选择性的二甲胺的工艺。
一种在催化剂存在下使甲醇、或甲醇和甲胺混合物、或甲胺混合物在气相中与氨反应生产二甲胺的工艺,其特征在于催化剂是用含有螯合剂的溶液处理沸石而制备的改性沸石。