Preparation method of hydrocracking catalyst

Abstract

The invention discloses a preparation method of a hydrocracking catalyst. The method comprises: first selecting a solution containing a hydrogenation active metal and an organic reagent to dip mixed powder of a molecular sieve and alumina, conducting drying, then subjecting the obtained material and a peptizing agent or a binder together to rolling, molding, drying and roasting, thus obtaining the catalyst. Only through one time high temperature roasting can the catalyst product be obtained. The preparation method is simple, and the preparation cost is obviously reduced. In addition, the hydrogenation activity center and the cracking activity center of the catalyst coordinate, so that the catalyst has very high catalytic activity. Also with a large specific surface area and pore volume, the hydrocracking catalyst is more suitable for a catalytic process of treating high dry point inferior vacuum distillate oil by hydrocracking for high production of naphtha.

Description

technical field [0001] The invention relates to a method for preparing a hydrocracking catalyst, in particular to a method for preparing a hydrocracking catalyst suitable for processing inferior raw materials and having high activity and high naphtha production. Background technique [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 , has become one of the most important heavy oil deep processing processes in modern oil refining and petrochemical industries, and has been increasingly widely used. As the quality of crude oil is deteriorating year by year, the import of high-sulfur crude oil has increased significantly, environmental protection has increasingly stringent requirements on ...

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Problems solved by technology

[0010] Through the above analysis, the impregnation method can be used to prepare the catalyst, which can give full play to the performance of the hydrogenation metal, but the metal content of the catalyst is greatly limited; although the co-precipitation method can prepare a hydrogenation catalyst with a high metal content, the utilization of the metal The rate is not high, and the pore structure of the catalyst is also limited

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.