Other catalytic non-hydrocarbon processes include the conversion of alcohols to olefinic hydrocarbons as described in U.S. Pat. No. 4,148,835; the conversion of lower alcohols and their ethers, such as methanol and dimethyl ether, to a hydrocarbon mixture of ethylene, propylene and mononuclear aromatics as described in U.S. Pat. No. 3,979,472; and the catalytic conversion of mercaptans, sulfides,