MICRO-SPHERICAL CATALYST FOR INCREASING YIELD OF CATALYTIC CRACKING GASOLINE AND METHOD FOR ITS PREPARATION Russian patent published in 2023 - IPC B01J35/08 B01J21/02 B01J21/18 B01J37/04 B01J37/08 C10G11/02 

FIELD: oil refining industry.

SUBSTANCE: micro-spherical catalyst for increasing the yield of catalytic cracking gasoline is described, including ultra-stable zeolite Y in a cation-decationized form and a matrix consisting of amorphous aluminosilicate, aluminum oxide, and kaolin clay, in which amorphous aluminosilicate modified with boron compounds is used as a matrix component, containing 1-5 wt.% of boron, with the following ratio of components in the catalyst, wt.%: zeolite Y 18-25; amorphous aluminosilicate 30-40; aluminum oxide 20-30; kaolin clay 15-22. A method for the preparation of a micro-spherical catalyst for increasing the yield of catalytic cracking gasoline is described, including ion exchanges for cations of rear earth elements and ammonium on zeolite NaY, two-stage ultra-stabilization of zeolite, mixing of zeolite with the matrix, as components of which amorphous aluminosilicate, aluminum oxide, and kaolin clay are used, spray drying of the resulting composition with subsequent calcination and obtainment of the catalyst. At the same time, amorphous aluminosilicate, during synthesis, is modified with boron compounds until boron content of 1-5 wt.% by mixing of liquid glass solutions and a mixture of aluminum sulfate and sulfuric acid with addition of boric acid, or with mixing liquid glass solutions with addition of ammonium tetraborate, ammonium sulfate, and sulfuric acid. In this case, liquid glass solutions are used with a concentration of 1.2-1.5 N and a module (molar ratio of silicon and sodium oxide) equal to 2.4-3.1, as well as aluminum sulfate with a concentration by aluminum oxide of about 20-40 g/dm³, with the following ratio of components in the catalyst, wt.%: zeolite Y 18-25; amorphous aluminosilicate 30-40; aluminum oxide 20-30; kaolin clay 15-22.

EFFECT: obtainment of a cracking catalyst providing an increase in the yield and selectivity of gasoline formation.

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