Liquid phase cyclohexylation of phenol with cyclohexene using 12-tungstosilicicacid supported onto different supports

Alkylation of phenol with cyclohexene as an alkylating agent was carried out in liquid phase by varying different parameters such as temperature, time, mole ratio of phenol to cyclohexene and amount of the catalyst over 30% 12-tungstosilicicacid supported onto hydrous zirconia and neutral alumina. The present catalysts show high activity towards the %conversion and %selectivity, especially for 2-cyclohexyl phenol, an important product used as intermediate in dyestuff preparation as well as in preparation of 2-phenyl phenol which is used as disinfectant and fungicides.

Acid catalysts having 30% loading of 12-tungstosilicicacid onto hydrous zirconia and neutral alumina were synthesized by impregnation method. The synthesized catalysts were evaluated for the cyclohexylation reactions of phenol, which were carried out by varying different parameters. The activities of both the catalyst were compared in order to see the effect of nature of the support. Figure optionsDownload as PowerPoint slide