A kind of preparation method of catalytic material containing Y-type molecular sieve

Abstract

A preparation method of a Y-type molecular sieve-containing catalytic material, comprising: (1) adding a certain amount of aluminum source, silicon source and acid to the solid waste residue of the catalyst factory to mix and beat it to make it stable and uniform, and to make it composed of: mainly containing 2.5-8wt% Na2O, 25-65wt% SiO2, 18-55wt% Al2O3; (2) drying the above-mentioned slurry, and roasting at 600-1100° C. for 0.5-4 hours; (3) step (2) ) ion-exchange the material obtained with sodium salt, hydrochloric acid or ammonium salt to remove harmful ions contained in the waste residue; (4) add water glass, sodium oxide, sulfuric acid, and guiding agent to the material obtained in step (3) and stir evenly to prepare A crystallization mixture is obtained, and the crystallization mixture is crystallized in a reaction kettle at 90-120° C. for 8-48 hours. and washing and drying the crystallized product to obtain a catalytic material containing Y-type molecular sieves. Compared with the method for preparing catalyst by recycling catalyst waste residue in the prior art, the method provided by the invention effectively eliminates the adverse effects of harmful metal ions in the waste residue, and improves the catalytic performance of the Y-type molecular sieve-containing catalytic material.

Description

technical field [0001] The invention relates to a method for preparing molecular sieves, and more specifically, relates to a method for preparing catalytic materials containing Y-type molecular sieves by using waste residues from catalyst factories as raw materials. Background technique [0002] In my country, the amount of molecular sieve cracking catalysts used for petroleum hydrocarbon cracking is increasing. The main raw materials for the production of molecular sieve cracking catalysts include water glass, sodium hydroxide, aluminum hydroxide, kaolin, sulfuric acid, hydrochloric acid, liquid ammonia, ammonium sulfate, ammonium chloride and dilute chloride, etc. . The product is a spherical catalyst of 60-80 microns, and the molecular sieve particle size of the intermediate product is about 1 micron. The production of molecular sieve cracking catalyst consists of three interconnected process stages: NaY molecular sieve hydrothermal synthesis, molecular sieve modificat...

AI Technical Summary

Problems solved by technology

[0014] In the above prior art, the catalyst waste residue is used as the raw material for preparing different types of molecular sieves and the method for the filler of the catalyst carrier. Although the utilization of the catalyst waste residue is more rationalized, it cannot Solve the problem of more harmful substances contained in the catalyst waste residue (such as F-, Ca2+, Mg2+, P, As, Pb, etc.), thus affecting the performance of molecular sieves or catalysts