Patent ID: 7727924
Filing Date: 2010-06-01
Classification: B01J,C10G

Abstract:
1. A method for increasing the solid content of catalytic cracking catalyst slurry, comprising making catalyst slurry by mixing to make homogeneous a clay, molecular sieve slurry, aluminum-containing binder, a pseudoboehmite, and an inorganic acid, said method comprising: (1) adding the inorganic acid before the addition of pseudoboehmite, and adding the molecular sieve after the addition of inorganic acid, wherein the weight ratio between the inorganic acid and the aluminum oxide in pseudoboehmite is 0.01-0.08; and (2) adding a phosphorus-containing dispersant into the process, wherein the dispersant is a phosphoric acid and/or phosphate added in an amount of from about 0.05% to about 6% based on the dry weight basis of the catalyst.