SUBSTITUTED ALPO4-11 MOLECULAR-SIEVES SAPO-11 AND COAPO-11 - SYNTHESIS, ACIDITY AND ALKYLATION OF TOLUENE WITH METHANOL

AlPO4-11 as well as substituted SAPO-11 and CoAPO-11 have been synthesized hydrothermally in the pure state. Results of acidity measurement show that the acid strength depends on the substituent. This is also supported by the results of alkylation of toluene with methanol on these catalysts. These molecular sieves exhibit very high para selectivity because of the elliptical 10-membered oxygen ring channels