Hydrocracking catalyst and preparation method thereof

Abstract

The invention discloses a hydrocracking catalyst and a preparation method thereof. The preparation method comprises the following steps: 1, dipping aluminum hydroxide xerogel powder used in a carrier in a solution containing a hydrogenation metal component; 2, drying the powder; and 3, fully rolling, molding and roasting the powder together with molecular sieve under the action of a peptizer or a binder to obtain the catalyst. The catalyst of the invention is obtained only through one-time high temperature roasting, so the preparation method is simple, and the preparation cost is obviously reduced. In addition, the hydrogenation center and the cracking center of the catalyst of the invention coordinate and cooperate with each other, so the catalyst has a high catalytic activity, and the catalyst which simultaneously has a large specific surface area and a large pore volume is suitable for processing catalytic process for the high productivity of naphtha by hydrocracking high-dry-point low-quality reduced pressure distillate oil.

Description

technical field [0001] The invention relates to a hydrocracking catalyst and a preparation method thereof, in particular to a hydrocracking catalyst for heavy distillate oil and a preparation method thereof. technical background [0002] Hydrocracking technology has the characteristics of strong adaptability of raw materials, great flexibility of product schemes, high selectivity of target products, good product quality, and high added value. It can directly convert various heavy and low-quality raw materials into clean fuel oil and high-quality chemical raw materials. It has become one of the most important heavy oil deep processing techniques in modern oil refining and petrochemical industries, and has been increasingly widely used at home and abroad. Although the processing capacity of my country's existing hydrocracking units has exceeded 40.0Mt / a, due to the deterioration of domestic crude oil quality year by year, the import of high-sulfur crude oil has increased signi...

AI Technical Summary

Problems solved by technology

Although this type of catalyst has high hydrogenation performance, the pore volume and specific surface area of ​​the catalyst are relatively small, and generally it can only process lighter fractions below diesel oil, and because the metal utilization rate of the catalyst prepared by the co-precipitation method is low, the metal dispersion performance Not good, and the preparation process is complicated, and the product stability is poor, so the catalyst is not cost-effective

[0009] The kneading method can also prepare catalysts with various active metal contents, but the performance of the catalyst prepared by the kneading method is relatively poor, the effective utilization rate of the active metal is low, and the hydrogenation catalyst is rarely prepared by the kneading method in industrial production.