Patent ID: 6342153
Filing Date: 2002-01-29
Classification: B01J,C10G

Abstract:
A class of pillared clay catalytic pyrolysis catalysts characterized in that:(1) said catalyst compositions comprise pillared clays of 30-75 wt %, inorganic oxide bonding agents of 10-40 wt %; silicon containing zeolites with pentasil structure or Y-zeolites or their mixtures of 0-30 wt %; modification components of 0-10 wt % and kaolin family clays as a matrix of 0-50 wt %; (2) wherein said pillared clays are aluminum pillared clays with an OH/Al ratio of about 2.5 and are prepared by using a polymerized aluminum chlorohydroxide or an aluminum-sol with an OH/Al mole ratio up to about 2.5 as a precursor of propped pillars between two adjacent 2:1 clay layers; (3) wherein said bonding agents are inorganic oxides formed by drying and calcining sol and gel substances, which are selected from sol and gel substances containing at least one of aluminum, silicon or zirconium, or derivatives of said sol and gel substances modified by at least one of phosphorus containing compounds or polyethylene glycol; (4) wherein said zeolites are unmodified or modified zeolites comprising at least one selected from the group consisting of ZRP series zeolites, ZSM-5 zeolites and Y zeolites; and (5) wherein said modification components are a class of substances whose precursor is at least one selected from the group consisting of Mg, Al, K, P, Sn and polyethylene glycol.