Preparation method of kaolin type fluid catalytic cracking catalyst

Abstract

A catalyst for catalytic cracking process is prepared from kaolinite, solid crystal seed, assistant, organic disperser and / or adhesive through spray drying, shaping microspheres, high-temp calcining,crystallizing reaction on sodium silicate and sodium hydroxide to obtain crystallized microspheres (content of NaY zeolite is 20-70%, ratio of zeolite silica-alumina is 4.0-6.0), calcining, and exchanging with NH4 and Re3 three times. Its advantages are high resistance to heavy metal, high activity and stability, and low cost.

Description

technical field [0001] The technology of the invention can be applied to the field of fluidized catalytic cracking (FCC) of petroleum processing. Specifically, the invention is a method for preparing a high-activity FCC catalyst by using kaolin as a main raw material through an in-situ crystallization technology. Background technique [0002] In-situ crystallization of kaolin to prepare FCC catalyst is to use kaolin as the basic raw material, form kaolin microspheres by beating and spray drying, and then roast the kaolin microspheres at high temperature to change the structure and properties of kaolin, and then mix it with other solutions. to crystallize. During the crystallization process, active silica and alumina are converted into NaY zeolite, and then exchanged and calcined to obtain a full kaolin-type zeolite catalyst. The so-called "in-situ crystallization" means that during the crystallization process of kaolin microspheres, their shape and ...

AI Technical Summary

Problems solved by technology

In this way, not only the preparation process is complicated, but also the NaY provided cannot enter the pores of the microspheres well.

The anti-heavy metal ability of the catalyst obtained in this patent application still needs to be improved