Clean preparation method of hydrocracking catalyst

Abstract

The invention relates to a clean preparation method of a hydrocracking catalyst. The clean preparation method comprises following steps of: (1) preparing a carrier of the hydrocracking catalyst; (2) preparing a dipping solution containing hydrocracking active components that are metal salts, wherein the hydrocracking active components comprise W and / or Mo in the VIB group and Ni and / or Co in the VIII group, the VIII metal salt is a salt of an organic acid, a dissolution process is performed under stirring at high temperature, the solution is placed in an ultrasonic wave environment and is cooled to the room temperature; and (3) dipping the carrier prepared in the step (1) into a measured amount of the metal salt dipping solution prepared in the step (2) with the dipping process being in an ultrasonic wave environment; performing solid-liquid separation after the dipping step, drying the dipped catalyst and calcinating to obtain a catalyst product. According to the clean preparation method, a pollution problem in the catalyst production process is overcome under the premise of guaranteeing the using performances of the catalyst, thus achieving clean production of the catalyst.

Description

technical field [0001] The present invention relates to a kind of preparation method of hydrocracking catalyst, especially in the preparation process without NO x Process for the preparation of vented hydrocracking catalysts. technical background [0002] Hydrocracking technology has the characteristics of strong adaptability to raw materials, great flexibility in production operations and product plans, and good product quality. It can directly convert various heavy and low-quality feedstocks into high-quality jet fuel, diesel, and lubricating oil base materials that are urgently needed by the market. As well as chemical naphtha and steam cracking ethylene feedstock (hydrocracking tail oil), it 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 at home and abroad. The key to hydrocracking technology is hydrocracking catalyst, and its improvement depends on the d...

AI Technical Summary

Problems solved by technology

[0007] In view of the low solubility of metal salts of group VIII of organic acids, it is difficult to prepare a high-concentration stable metal salt solution, and it is difficult to meet the problems of preparing hydrocracking catalysts by impregnation method. Provide metal ions to make the metal solution in a stable state exceeding saturation, so as to meet the requirements of high concentration and stability of the metal salt solution prepared by the impregnation method, and realize the clean preparation of the hydrocracking catalyst with high metal content by the impregnation method