Process for modifying the physical and chemical properties of faujasite Y-type zeolites

A process for producing a Faujasite Y-type zeolite having modified physical and chemical properties, comprising the steps of:

• a) contacting a Faujasite Y-type zeolite with glycerol in an amount of 0.01 to 1 g of Faujasite Y-type zeolite per ml of glycerol at a temperature of 100 to 260° C. for 0.5 to 8 hours to form a gel;
• b) adding at least one ammonium salt to the gel of step a) in an amount of 0.1 to 1 g per gram of said zeolite to form a mixture, stirring the mixture at a temperature of 20 to 80° C., and subjecting the mixture to a hydrothermal treatment at a temperature of 95 to 220° C., and cooling the mixture to room temperature, and;
• c) recovering the resulting product obtained in step b), washing the recovered product and drying at a temperature of 90 to 110° C. to form a dried solid, subjecting the dried solid to a thermal treatment in an air atmosphere at a temperature of 350 to 550° C. for 2 to 8 hours at a heating profile of 1 to 3° C./min to obtain the modified Faujasite Y-type zeolite having a bimodal pore distribution having a first pore system of 2-20 nm and a second pore system of 30-100 nm, where the sodium is reduced up to 75% with respect to the Faujasite Y-type zeolite starting material.