Y. Goa et al., A dramatic improvement of epoxide selectivity of [Ti,Al]-beta by ion-exchange with quaternary ammonium salts, CHEM COMMUN, (18), 2001, pp. 1714-1715
Ion-exchange of [Ti,Al]-beta with quaternary ammonium acetates greatly enha
nces the epoxide selectivity in the oxidation of alkenes with hydrogen pero
xide; this is due to the selective poisoning of the acid sites without supp
ressing the oxidation activity of Ti sites.