Cs_(2.5)H_(0.5)PW_(12)O_(40)Bonded to an Amine Functionalized SiO_2 as an Excellent Water-tolerant Solid Acid

摘要

Unlike Cs_(2.5)H_(0.5)PW_(12)O_(40),Cs_(2.5)H_(0.5)PW_(12)O_(40)-SiO_2 composites combined using(3-aminopropyl)triethoxysilane are entirely insoluble and well sedimentable in reaction mixtures that contain a large excess of water.The catalytic activities for the hydration of olefin and hydrolysis of ester in the presence of excess water were comparable to those of Cs_(2.5)H_(0.5)PW_(12)O_(40)and were much higher than those of typical water-tolerant solid acids,such as H-ZSM-5 and Nb_2O_5.