High-activity hydrocracking catalyst and preparation method thereof

Abstract

The invention provides a high-activity hydrocracking catalyst and a preparation method thereof, relates to a porous solid catalyst and a preparation method thereof, and provides the high-activity hydrocracking catalyst using tetraethoxysilane as a silicon oxide source and citric acid as a complexing agent and the preparation method thereof. The catalyst comprises the following components in percentage by mass: 10 to 50 percent of an acid component, 5 to 10 percent of a hydrogenation component, and the balance of a vector, wherein the acid component is cesium phosphotungstate, the hydrogenation component is nickel, and the vector is silicon oxide. Water soluble nickel salt and water soluble cesium salt which are prepared by the catalyst in the set component content are added to the complexing agent aqueous solution respectively to prepare solution A; and the silicon source which is figured out according to the set content of the silicon oxide in the catalyst is added to the solution A to prepare solution B; and heteropoly acid aqueous solution prepared according to the set component content of the catalyst is added into the solution B, the solution is evaporated and dried, and the obtained solid is roasted to obtain the catalyst.

Description

technical field [0001] The invention relates to a porous solid catalyst and a preparation method thereof, in particular to a long-chain alkane hydrocracking catalyst and a preparation method thereof. Background technique [0002] In the oil refining industry, hydrocracking is an important process for producing high-quality light oil products from heavy oil. A transformation process of chemical reactions such as depletion and cracking. The hydrocracking process can not only produce high-quality light oil products, but also has a high yield of liquid phase products. The core of hydrocracking technology is the catalyst, which is a dual-functional catalyst, which has both acidic and hydrogenation functions. The acid function of the hydrocracking catalyst involved in US Patent No. 5,536,687, US No. 5,447,623 and European Patent No. EP0028938A1 is mainly provided by molecular sieves, and Mo-Ni or W-Ni is selected as the hydrogenation component. However, the Chinese patent CN100...

AI Technical Summary

Problems solved by technology

The hydrocracking catalyst containing molecular sieve has the advantages of strong acidity and large specific surface, but its disadvantage is that the small pore size of molecular sieve increases the diffusion resistance of reactants and products, and the probability of secondary cracking reaction increases

The hydrocracking catalyst containing phosphotungstic acid has the advantages of strong acidity and large pore size, but its disadvantage is that phosphotungstic acid has high water solubility and is easy to lose during use, and because of its strong acidity, it increases the secondary cracking reaction possibility of