OXIDATION AND AMMOXIDATION OF 4-PICOLINE OVER VANADIUM-SILICO-ALUMINOPHOSPHATE CATALYSTS

Vanadium-silico-aluminophosphate (VSAPO), vanadium-aluminophosphate (V APO) and silico-aluminophosphate (SAPO) catalysts have been synthesize d using tetrapropylammonium bromide as a template. The resulting catal ytic materials are as-synthesized crystalline molecular sieves or comp osite catalysts of molecular sieves. The XRD, IR and ESR studies of th ese catalysts have been studied. The oxidation and ammoxidation of 4-p icoline over vanadium-silico-aluminophosphate (VSAPO) and vanadium-alu minophosphate (VAPO) catalysts lead to corresponding 60-95% yields of aldehydes and nitriles. We report crystalline and amorphous modified V -slico-aluminophosphates as a new class of oxidation and ammoxidation catalytic materials.