Hydrocracking catalyst carrier and preparation method thereof

Abstract

The invention discloses a hydrocracking catalyst carrier and a preparation method thereof. The catalyst carrier is composed of a small-grain Y type molecular sieve, amorphous silica-alumina and alumina. According to the preparation method, the small-grain Y type molecular sieve with the characteristics of proper dealumination degree, good crystallinity retentivity and well-developed secondary pores is used as an acid component; and when the small-grain Y type molecular sieve and the amorphous silica-alumina are cooperatively used for preparing a hydrocracking catalyst, the hydrocracking catalyst has the advantages of good activity, heavy naphtha selectivity and superior product quality.

Description

technical field [0001] The invention relates to a hydrocracking catalyst carrier and a preparation method thereof, in particular to a hydrocracking catalyst carrier containing small grain Y-type molecular sieves and a preparation method thereof. Background technique [0002] Hydrocracking technology is one of the important means for the secondary processing of crude oil and the lightening of heavy oil. Due to its strong adaptability to raw materials, flexible operation and product solutions, and good product quality, it has become an important method for the production of high-quality light oil. It is an important way to solve the source of chemical raw materials. [0003] The key to hydrocracking technology is the catalyst. Newly developed catalysts are required to have higher activity and selectivity, so as to improve the adaptability of the device to raw materials and the flexibility of processing schemes, produce more high-efficiency components, reduce energy consumptio...

AI Technical Summary

Problems solved by technology

In this method, the raw material needs to be treated with ammonium hexafluorosilicate for dealumination of silicon, and then undergo hydrothermal treatment and other treatments, so as to reduce the collapse of the molecular sieve skeleton structure and improve the crystallization retention of the molecular sieve. After treatment with ammonium hexafluorosilicate for dealumination and silicon supplementation, due to the isomorphic substitution of silicon and aluminum, the molecular sieve silicon oxide aluminum structure is relatively complete, and then hydrothermal treatment will form less secondary pores, and the proportion of secondary pores is low. Catalyst molecular sieve component, target product selectivity is low

[0008] In the preparation process of the existing method, small-grain NaY molecular sieves, silicon and aluminum are easily lost, the utilization rate of silicon is low, and the distribution of silicon and aluminum is not uniform, and it is easy to appear agglomeration, so the existing methods still cannot prepare small-grain NaY molecular sieves with high silicon-aluminum ratio and good thermal stability and hydrothermal stability

After subsequent modification, small-grained Y-type molecular sieves with complete structure, high crystallinity and more secondary pores cannot be obtained. As the cracking component of the catalyst, the yield of the target product is low.