Liquid phase nitration of aromatics using solid acid catalyst

摘要

The present invention discloses an improved process for the liquid phase nitration of aromatic compounds catalyzed by WO3 supported on mesoporous silica support, at low temperature, with high conversion and selectivity.

主权项

1. A process of liquid phase nitration of aromatic compounds using a solid acid catalyst, said process comprising: Refluxing a solution of an aromatic compound and the solid acid catalyst in an organic solvent under nitrogen atmosphere at a temperature in the range of 80-110° C. for period of 1 hour followed by drop wise addition of 30-98% HNO3 with removal of water formed during the reaction azeotropically; wherein said solid acid catalyst is tungsten oxide (WO3) supported on mesoporous silica having BET surface area in the range of 367 to 397 m2/g and the boiling point of said organic solvent is in the range of 80-110° C. and the organic solvent is acetonitrile, 1,2 dichloroethane or dioxane.