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1. 发明授权

US06207866B1 Method for producing diarylmethane or its derivatives 失效
标题翻译：二芳基甲烷或其衍生物的制备方法
公开(公告)号：US06207866B1
公开(公告)日：2001-03-27
申请号：US09111873
申请日：1998-07-08
申请人： Tadanori Kawamata , Hideyuki Dohi , Satoru Inoue , Shozo Hayashi
发明人： Tadanori Kawamata , Hideyuki Dohi , Satoru Inoue , Shozo Hayashi
IPC分类号： C07C3916
CPC分类号： C07C37/16 , C07C2/865 , C07C37/115 , Y02P20/127 , Y02P20/582 , C07C15/16 , C07C39/16
摘要： A method to produce diarylmethane or its derivatives by condensation reaction can be carried out without difficulty and without the deterioration of catalyst, and the intended product can be produced inexpensively by recovering and recycling used alcohol. In the method, dimethoxymethane and an aromatic compound are reacted at a temperature of 80 to 400° C. with an acid catalyst. Further, the method comprises the steps of (1) reacting alcohol with formaldehyde using an acid catalyst to obtain acetal; (2) reacting the acetal and an aromatic compound using an acid catalyst to obtain a reaction mixture containing diarylmethane or its derivatives and alcohol; (3) separating and recovering diarylmethane or its derivatives and alcohol from the reaction mixture, and (4) recycling at least a portion of the recovered alcohol to the step (1).
摘要翻译：通过缩合反应生产二芳基甲烷或其衍生物的方法可以毫无困难地进行，而不会导致催化剂的劣化，并且通过回收和循环使用的醇可以廉价地生产目的产物。在该方法中，二甲氧基甲烷和芳族化合物在80〜400℃的温度下与酸催化剂反应。此外，该方法包括以下步骤：（1）使用酸催化剂使醇与甲醛反应以获得缩醛; （2）使用酸催化剂使缩醛和芳族化合物反应，得到含有二芳基甲烷或其衍生物和醇的反应混合物; （3）从反应混合物中分离和回收二芳基甲烷或其衍生物和醇，和（4）将至少一部分回收的醇循环至步骤（1）。

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