Preparation method of thermometal phosphide hydrofining catalyst

Abstract

The invention provides a preparation method of a thermometal phosphide hydrofining catalyst. The method comprises the following steps of: firstly, preparing a bulk phase WP or a WP loaded by a porous carrier material by adopting a traditional procedure warming reduction method, then soaking the bulk phase WP or the WP loaded by the carrier in a nickel chloride and sodium hypophosphite solution, drying, carrying out thermal treatment in nitrogen, passivating and washing to obtain the bulk phase thermometal phosphide WP-Ni2P catalyst or the catalyst loaded by the carrier, and bulk phase thermometal phosphide MoP-Ni2P catalyst or the catalyst loaded by the carrier can be obtained by adopting the same method. The method provided by the invention has characteristics that the method effectively utilizes temperature difference between the metal phosphide prepared by the procedure warming reduction method and the metal phosphide prepared by a hypophosphite resolving method, a novel preparation technology of the thermometal phosphide hydrofining catalyst is provided, the method realizes the synergy acceleration action of different metal phosphides, and the catalytic activity of the metal phosphide is effectively improved.

Description

technical field [0001] The invention belongs to the technical fields of catalytic materials, petroleum refining and petrochemical industry, and relates to a preparation method of a bimetallic phosphide catalyst used in oil hydrorefining. Background technique [0002] With the heavy and inferior quality of crude oil, the enhancement of people's awareness of environmental protection and the increasingly stringent environmental protection laws and regulations, the development of clean fuel production technology has become one of the most important challenges and driving forces for petroleum refining technology. To meet this challenge, oil refining technology is developing towards the production of clean petroleum fuels with ultra-low sulfur and ultra-low nitrogen content. The traditional hydrorefining catalysts are supported Ni-Mo, Ni-W or Co-Mo sulfides Catalysts, although sulfide catalysts have been continuously improved, their performance still cannot meet the increasingly s...

AI Technical Summary

Problems solved by technology

However, the transition metal phosphide is different from the traditional sulfide structure. When the second metal component is introduced, the activity of the catalyst will generally decrease, that is, the activity of the double metal phosphide is not as good as that of the single metal phosphide.