Catalytic cracking catalyst and preparation method thereof

Abstract

The invention discloses a catalytic cracking catalyst. The catalytic cracking catalyst is prepared from, by weight, 20-45 parts of active components, 35-45 parts of clay and 10-45 parts of adhesive. The adhesive is calculated based on oxide, and the adhesive is phosphorus silica-alumina gel. The invention further discloses a preparation method of the catalytic cracking catalyst. The preparation method includes the steps that the clay and deionized water are mixed and pulped to be fully uniform, the active components and the adhesive are added into pulp, mixing and stirring are conducted, spray drying and pelleting are conducted after acidification, and a head product is obtained; the head product is calcined at the set temperature, a calcined product is obtained, and the cauterant decrease of the calcined product is controlled; the calcined product and silicon tetrachloride are subjected to a contact reaction at a set ratio, the reaction temperature is controlled at the set temperature, the product is washed, filtered and dried after the reaction is completed, and the catalytic cracking catalyst is obtained. According to the catalyst, multiple times of exchange and calcination of the active components are not needed, and the process is simple and environmentally friendly. The adopted phosphorus silica-alumina gel is good in adhesion, no acid gas is generated in the calcination process, equipment is prevented from being corroded, and the energy consumption and the production cost of the catalyst are reduced.

Description

technical field [0001] The invention relates to the technical field of catalyst preparation, in particular to a catalytic cracking catalyst and a preparation method thereof. Background technique [0002] Catalytic cracking (FCC) is an important secondary processing process of crude oil and occupies a pivotal position in the oil refining industry. With the increasingly heavy and inferior raw material oil and increasingly stringent environmental protection regulations, the production of catalysts that can improve the cracking performance of catalysts and meet environmental protection requirements has become one of the current hot research. [0003] In 1949, Breck of UCC successfully synthesized Y molecular sieve with industrial application value for the first time. It has a regular pore structure and is based on β cages and hexagonal column cages to form an octahedral zeolite with a supercage structure. Y molecular sieve shows high stability and catalytic activity in the crac...

AI Technical Summary

Problems solved by technology

In this way, it is difficult to avoid the pollution of the waste filtrate to the environment caused by the repeated exchange and roasting of molecular sieves. Moreover, different degrees of aluminum extraction and silicon supplementation will lead to instability of the molecular sieve skeleton to a certain extent, greatly reducing its Crystal retention

At present, most patents and documents mainly use SiCl 4 The improvement and improvement of the catalyst performance can be achieved by modifying the molecular sieve, and directly through SiCl 4 There are few reports on the reaction with catalytic cracking catalysts to improve catalytic performance and stabilize the skeleton structure

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