公开(公告)号：US5495060A

公开(公告)日：1996-02-27

申请号：US214970

申请日：1994-03-17

申请人： Makoto Takagawa ,  Ryusuke Shigematsu ,  Kazuo Nagagata

发明人： Makoto Takagawa ,  Ryusuke Shigematsu ,  Kazuo Nagagata

IPC分类号： C07B61/00 ,  B01J29/18 ,  C07C5/27 ,  C07C15/24 ,  C07C5/22

CPC分类号： C07C5/2708 ,  C07C5/2737 ,  C07C2529/18

摘要： There is disclosed a method for isomerizing dimethylnaphthalene (DMN) in liquid phase under atmospheric pressure by using a catalyst comprising hydrogen-form mordenite which has a molar ratio of silica to alumina (SiO.sub.2 /Al.sub.2 O.sub.3 ratio) of at least 100 and is molded by incorporating alumina as the molding aid therein. According to the above method, the objective 2,6-DMN minimized in the contents of impurities can stably be produced in high selectivity and high yield under mild reaction conditions for a long period of time, while side reactions and deterioration of the catalyst are suppressed to a minimum.

摘要翻译： 公开了一种通过使用包含二氧化硅与氧化铝的摩尔比（SiO 2 / Al 2 O 3比）至少为100的氢型丝光沸石的催化剂在常压下在液相中异构化二甲基萘（DMN）的方法，并通过掺入 氧化铝作为其中的助剂。 根据上述方法，在温和反应条件下长时间稳定地以高选择性和高收率产生杂质含量最小化的目的物2,6-DMN，同时抑制副反应和劣化 至少。

公开(公告)号：US5254769A

公开(公告)日：1993-10-19

申请号：US851827

申请日：1992-03-16

申请人： Makoto Takagawa ,  Ken Yamagishi ,  Kazuo Nagagata

发明人： Makoto Takagawa ,  Ken Yamagishi ,  Kazuo Nagagata

IPC分类号： C07C5/27 ,  C07C5/22

CPC分类号： C07C5/2748

摘要： Dimethylnaphthalenes are isomerized into 2,6-dimethylnaphthalene by utilizing hydrogen fluoride as a catalyst and straight chain saturated aliphatic hydrocarbons having carbon atoms in the range from 5 to 12 as the solvent. Isomerization to other undesirable isomers such as 2,7-dimethylnaphthalene and side reactions such as disproportionation are suppressed and a very high degree of the isomerization to 2,6-DMN can be attained.