Аннотация:Catalytic conversion of dimethyl ether and methanol to light olefins was studied using zeolite catalyst ZVM (analogue of ZSM-5) and SAPO-34 type. The modification of Zn-ZVM by P and Zr increased the yield of C2?C4 olefins (about 50%). At the 450°C, the yield of ethylene was more than the yield of propylene, whereas, at the 375°C, the yield of propylene was more than yield of ethylene. Reduction of partial pressure of methanol and time of contact at simultaneous increase in temperature resulted in essential increase in C2?C3 yield, and reduced C4 yield. The addition of water to the feed of methanol decreased the formation of coke and prolonged the catalysts activity.