Catalytic hydrocarbon conversion with a crystalline zeolite composite catalyst

Claim 1

IN THE PROCESS FOR CRACKING A HYDROCARBON CHARGE STREAM WITH A SOLID POROUS CATALYST WHEREIN THE PRODUCTS COMPRISE BOTH ECONOMICALLY VALUABLE LIQUID HYDROCARBONS BOILING IN THE MOTOR FUEL RANGE AND UNDESIRABLE BY-PRODUCTS OF LESSER ECONOMIC SIGNIFICANCE THE IMPROVEMENT IN SELECTIVITY, EVIDENCED BY THE PRODUCTION OF A SUBSTANTIALLY GREATER AMOUNT OF SAID VALUABLE LIQUID HYDROCARBONS TOGETHER WITH CONCOMITANT REDUCTION IN THE YIELD OF UNDESIRED BY-PRODUCTS FROM A GIVEN HYDROCARBON CHARGE, WHICH COMPRISES CONTACTING SAID CHARGE UNDER CRACKING CONDITIONS WITH A CRYSTALLINE ALUMINOSILICATE HAVING AN ORDERED CRYSTALLINE STRUCTURE HAVING NO MORE THAN 0.25 EQUIVALENT PER GRAM ATOM OF ALUMINUM OF ALKALI METAL WHEREIN THE ENHANCED SELECTIVITY OF SAID ALUMINOSILICATE ARISES FROM THE FACT THAT IT HAS ASSOCIATED THEREWITH BOTH RARE EARTH CATIONS AND IONS SELECTED FROM THE GROUP CONSISTING OF HYDROGEN, HYDROGEN PRECURSORS AND MIXTURES THEREOF.