SUPPORTED HETEROPOLYACID CATALYST, METHOD FOR THE PRODUCTION THEREOF, AND USE

摘要

The invention relates to various supported heteropolyacid catalysts, to the method for the product thereof, and to the use of same as an acid catalyst in heterogeneous phase processes, concretely in the production of dimethyl ether from methanol. By supporting the heteropolyacid catalysts in inorganic solids by means of the impregnation technique, the area of the heteropolyacids (very low in the pure form thereof) increases dramatically and catalytic processes are therefore favoured in the heterogeneous phase. This synthesis process is not complicated and is easily scalable. These catalysts are extremely active and selective in the production of dimethyl ether at temperatures substantially lower than those of the catalysts used in the industrial process. The production of dimethyl ether has an almost 100 % yield and the deactivation is very low.