Preparation of rare earth contained hydrocracking catalyst

Abstract

The preparation method of hydrocracking catalyst containing rare earth includes the following steps: mixing molecular sieve, alumina precursor and / or amorphous silica-alumina and rare earth salt according to the required propertion, and is necessary, adding peptizator, kneading or extruding-forming, drying and roasting to obtain formed catalyst carrier, then loading the hydrogenated metal active component on the formed catalyst carrier. The adoption of said invention method can make the rare earth content of catalyst reach to the required level by one-step operation, at the same time its operation is simple.

Description

technical field [0001] The invention relates to a preparation method of a petroleum hydrocarbon hydrocracking catalyst. technical background [0002] Hydrocracking is a conversion process in which hydrocarbon molecules and hydrogen undergo cracking and hydrogenation reactions on the surface of a catalyst under a relatively high hydrogen partial pressure to generate smaller molecules. The main raw material processed by hydrocracking is heavy distillate oil, including catalytic cracking cycle oil and coking distillate oil, etc. The products are mainly high-quality oil products, especially the production of high-quality aviation kerosene and low freezing point diesel oil. Hydrocracking has the characteristics of strong adaptability to raw materials, and various inferior raw materials can be used, such as coking distillate oil, catalytic cracking cycle oil, etc., and the yield of light oil products is high, the quality is good, and the operation flexibility is large. Different t...

AI Technical Summary

Problems solved by technology

[0010] Based on the existing technology, the introduction of rare earths in rare earth-containing hydrocracking catalysts is generally achieved by exchanging the framework cations (such as sodium ions) of molecular sieves with rare earth ions. The problem is that the exchange of rare earth ions is affected by zeolite ions. Due to the limitation of balance, more than two rare earth ion exchange steps are often required to make the catalyst obtain the desired higher rare earth content