Hydrocracking catalyst for Tscher-Topsch synthesis of heavy wax, its preparation method and application thereof

Abstract

The invention relates the hydrogenation-cracking catalyst used to synthesize heavy wax, comprising 10.0-24.0wt% HY molecular screen, 10.0-24.0wt% SAPO-11 molecular screen, 3.0-10.0wt% nickel oxide, 3.0-10.0wt% nickel oxide, 0.0-15.0wt% molybdenum oxide or tungsten oxide, 10.0-24.0wt% amorphous oxide compound and 5.0-65.0wt% diaspore. The method comprises preparing carrier and dipping active component. The catalyst has the advantages of good catalytic cracking property, high diesel selective, and good isomerization property.

Description

technical field [0001] The invention belongs to a hydrocracking catalyst and its preparation method and application, in particular to a hydrocracking catalyst suitable for Fischer-Tropsch synthesis of heavy wax, its preparation method and application. technical background [0002] In recent years, with the shrinking of the world's crude oil resources and the rise of crude oil prices, the energy consumption structure is gradually changing from oil-dependent to oil, coal and natural gas diversification, thus making coal / natural gas indirect liquefaction technology a liquid fuel in the post-petroleum industry era. One of the most attractive avenues. However, my country has a resource structure with more coal and less oil. Converting coal into engine fuel through F-T synthesis is one of the important ways to solve my country's current fuel shortage and clean and efficient use of coal resources. [0003] Hydrocracking technology is an important oil processing method. Its product...

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Problems solved by technology

[0008] Gortsema FG etc. have reported in US5047139 that the Y-type molecular sieve (acid leaching) with a content of 7wt% and 50wt% SiO 2 -Al 2 o 3 , 15wt% binder mixed together to support Ni-W, the diesel production efficiency is as high as 87%. For the cracking of heavier oil components and macromolecular hydrocarbons, the micropores of zeolite limit the diffusion of macromolecules, resulting in cracking activity reduce

[0009] US4517074 patent discloses a crude oil hydrocracking catalyst to produce middle distillate oil at 150-370°C. In addition to using zeolite components, the catalyst is characterized in that it uses an Al 2 o 3 -SiO 2 Dispersion system, its SiO 2 The content reaches 20-65wt%. Although the amorphous silicon-alumina in the dispersion system has a certain cracking activity, it needs to be dispersed on a certain alumina matrix to carry a large amount of pore volume and specific surface of the hydrogenation metal component. Although the catalyst has a high medium oil selectivity, generally above 80%, but its activity is low, to achieve a conversion rate of 60%, the reaction temperature is generally above 400°C

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