公开(公告)号：US06703532B2

公开(公告)日：2004-03-09

申请号：US10032380

申请日：2001-12-21

申请人： Boyapati Manoranjan Choudary ,  Mannepalli Lakshmi Kantam ,  Nadakuditi Sailendra Kumar ,  Kompella Vishweshwara Ram Prasad ,  Kondapuram Vijaya Raghavan

发明人： Boyapati Manoranjan Choudary ,  Mannepalli Lakshmi Kantam ,  Nadakuditi Sailendra Kumar ,  Kompella Vishweshwara Ram Prasad ,  Kondapuram Vijaya Raghavan

IPC分类号： C07C20500

CPC分类号： C07C201/08 ,  C07C205/06

摘要： This invention relates to a process for the nitration of xylene isomers by using zeolite-beta as a catalyst. This invention particularly relates to a process for the nitration of xylenes using solid acid catalyst, thus totally eliminating the disposal of spent acid and salts. Herein we describe the nitration of disubstituted benzenes, all the isomers of xylene, by employing nitric acid and beta zeolite catalyst dispensing the use of acetic anhydride. The reactions were performed at temperatures ranging from room temperature to reflux temperature of the solvent

摘要翻译： 本发明涉及通过使用沸石-β作为催化剂硝化二甲苯异构体的方法。 本发明特别涉及使用固体酸催化剂硝化二甲苯的方法，从而完全消除废酸和盐的处理。 在这里，我们描述了二取代苯的硝化，二甲苯的所有异构体，通过使用硝酸和β沸石催化剂分配使用乙酸酐。 反应在溶剂的室温至回流温度的温度下进行