CATALYST, PROCESS FOR PREPARING THE CATALYST AND PROCESS FOR PRODUCING LOWER HYDROCARBON WITH THE C

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A zeolite catalyst of MFI structure containing an alkaline earth metal for use in the synthesis of a lower hydrocarbon from dimethyl ether and/or methanol, which zeolite catalyst exhibits an Si/Al atomic ratio of 30 to 400 and an alkaline earth metal/Al atomic ratio of 0.75 to 15, having an average particle diameter of 0.05 to 2 mum.