HYDROCRACKING CATALYST, METHOD FOR PRODUCTION THEREOF AND USE THEREOF, AND CATALYTIC DIESEL OIL HYDROCRACKING METHOD

摘要

FIELD: chemistry.;SUBSTANCE: present invention relates to catalytic diesel oil hydrocracking. Described is a diesel oil hydrocracking catalyst comprising a substrate, an active metal and carbon component, in which, based on the total weight of the catalyst, the content of support is 60–90 wt. %, content of active metal component in terms of metal oxides is 15–40 wt. %, and content of carbon in terms of elemental C is 1–5 wt. %, wherein the sum of components in catalyst is 100 wt. %, wherein the substrate is a silicon and aluminium oxide substrate which contains Y-type modified molecular sieves, metal in component - active metal is selected from metals - elements of group VIII and/or metals - subgroup VIB elements, carbon source is selected from gaseous or liquid carbon material; wherein content of metals - elements of group VIII in terms of metal oxides is 2–15 wt. %, and content of metals - elements of VIB subgroup in terms of metal oxides is 10–30 wt. %, on surface of catalyst atomic ratio of metals - elements of VIII group to Al is (0.2–0.5):1, and atomic ratio of metals - elements of subgroup VIB to Al is (0.4–0.8):1; wherein obtained using the method of assessing acidity by infrared spectroscopy, acidic properties of the hydrocracking catalyst are as follows: total amount of acid according to infrared spectroscopy method is 0.4–0.8 mmol/g, wherein amount of acid according to infrared spectroscopy method for strong acid with desorption temperature higher than 350 °C is 0.08 mmol/g or lower, and ratio of total amount of acid according to method of infrared spectroscopy to amount of acid based on infrared spectroscopy method for a strong acid with desorption temperature of more than 350 °C is 5–50, and describes a hydrocracking catalyst, a method for production thereof and use thereof, as well as a catalytic diesel oil hydrocracking method. Method of producing said diesel hydrocracking catalyst involves the steps of: (1) adjusting the substrate so that it is in contact with the carbon source and carbon deposition reaction takes place to form a carbonised substrate; (2) annealing the carbonised substrate in an oxygen-containing gas to form a decarburized substrate in which the carbon content is 20–80 wt. % from content of carbon in carbonised substrate, wherein content of oxygen in oxygen-containing gas is 0.5–8 vol. %, calcination temperature is 250–390 °C, and annealing time is 3.5–20 hours; (3) adding a precursor of the active metal component to the decarburized substrate and drying the decarburized substrate; and (4) treating the product obtained at step (3) by a heat treatment process. Also disclosed are use of said hydrocracking catalyst in hydrocracking reaction of diesel oil, and a method for hydrocracking catalytic diesel oil, involving: (a) pretreatment of catalytic diesel oil by hydrocracking and (b) treating the product obtained in step (a) by hydrocracking in the presence of said hydrocracking catalyst for diesel oil and hydrogen.;EFFECT: technical result is catalyst can maintain high reactivity and stability of reaction, simultaneously significantly improving output of gasoline product, total yield of liquid products and octane number of gasoline product.;14 cl, 12 ex, 5 tbl