Process for preparing fluidized cracking catalysts from equilibrium fluidized cracking catalysts
AssigneeEnglehard Corporation
InventorsStephen H. Brown, Roland von Ballmoos
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Abstract
A process for the reuse or recycling of FCC equilibrium catalysts is disclosed. The process involved treatment of a zeolite-containing equilibrium catalyst with clear seeds, a source of sodium oxide, a source of silica and water at elevated temperatures in order to destroy the Y originally present in the equilibrium catalyst and regrow zeolite Y in the pores of the matrix to a level no higher than 70 weight percent.
Claims4
A process for treating an equilibrium catalyst comprising zeolite Y and a matrix which comprises contacting the same at a temperature in the range of 160.degree. to 230.degree. F. with a source of silica, a source of sodium oxide, water and an aqueous solution of clear amorphous seeds in order to destroy the zeolite Y originally present in said equilibrium catalyst and to regrow zeolite Y in the matrix of said equilibrium catalyst to a level not exceeding 70 weight percent in the as-synthesized form while substantially preserving the physical properties of said matrix.
Dependencies are inferred from the claim text.