Synthesis of Bisphenol F Catalyzed by Aluminum-grafted MCM-41 Mesoporous Molecular Sieve

Abstract

Cetyltrimethylammonium bromide(CTAB) and tetraethylorthosilicate(TEOS) were selected as raw materials for the synthesis of pure silicon MCM-41.Using Al(NO 3) 3 ·9H 2 O as aluminum source to modify pure silicon MCM-41 by grafting method.The AlMCM-41 was characterized by NH 3-TPD.The results show that AlMCM-41 produced mild acid after grafting.The synthesis of bisphenol F was catalyzed by AlMCM-41 with different silicon/aluminium.The optimized reaction conditions are:n(phenol)/n(formaldehyde) = 30,reaction time of 5 h,reaction temperature of 90 ℃,m(formaldehyde)/m(AlMCM-41) = 7.In a certain range,the yield of bisphenol F increases with the increase of Al.When the n(Si)/n(Al) is less than 50,the yield of bisphenol F tends to decrease.While n(Si)/n(Al) = 50,the yield of bisphenol F can reach its highest value of 42.28%.