Preparation of hydrocarbon conversion catalysts

Claim 1

A PROCESS FOR PREPARING CRYSTALLINE ALUMINO SILICATE CONTAINING CATALYSTS WHICH COMPRISES: T A. FORMING A ZEOLITE PRECURSOR REACTION MIXTURE CONTAINING SILICA, ALUMINA, SODIUM HYDROXIDE AND WATER AND CRYSTALLIZATION INITIATING AMORPHOUS SILICA-ALUMINA NUCLEATION CENTERS HAVING A PARTICLE SIZE BELOW ABOUT 0.1 MICRON; B. HEATING SAID REACTION MIXTURE TO A TEMPERATURE OF FROM ABOUT 90* TO 110*C. FOR ABOUT 15 TO 120 MINUTES TO PRODUCE ABOUT 15 TO 100% OF THE CRYSTALLINE ZEOLITE THEORETICALLY AVAILABLE TO SAID REACTION MIXTURE; C. DILUTING SAID REACTION MIXTURE WITH SUFFICIENT WATER TO YIELD A SODIUM SILICATE SOLUTION CONCENTRATION OF FROM ABOUT 3 TO 7% BY WEIGHT SIO2 IN SAID REACTION MIXTURE; D. GELLING SAID REACTION MIXTURE WITH A GELLING MIXTURE SELECTED FROM THE GROUP CONSISTING OF MINERAL ACIDS, CO2, ALUMINIUM SALTS AND MIXTURES THEREOF TO PRODUCE AN AMORPHOUS HYDROGEL COMPOSITE HAVING CRYSTALLINE ZEOLITE DISPERSED THEREIN; E. AMMONIUM EXCHANGING SAID COMPOSITE TO LOWER THE NA2O CONTENT THEREOF TO BELOW ABOUT 1% BY WEIGHT; F. EXCHANGING SAID AMMONIUM EXCHANGED PRODUCT WITH A RARE EARTH SALT SOLUTION; G. WASHING AND DRYING SAID COMPOSITE TO PRODUCE A PARTICULATE CATALYST.