Hydroxy groups on the surface of zeolite Y can be converted to phosphate gr
oups by reaction with alkyl phosphoric acids as well as with metaphosphates
when generated in the presence of the solid. Phosphonic and phosphinic aci
ds also reacted readily with the OH groups. The products were characterised
by P-31, Si-29, and Al-27 NMR spectroscopy. (C) 1998 John Wiley & Sons, In
c.