Preparation method of sulfurized type hydrogenation catalyst

Abstract

The invention discloses a preparation method of a sulfurized type hydrogenation catalyst. The method comprises the following steps: (1) preparing a solution containing a reactive metal complex, performing drying dehydration to obtain a reactive metal precursor, and preparing a semi-sulfurized material from the reactive metal precursor, a sulfurizing reagent and a sulfurizing aid by a mixed reaction; (2) uniformly mixing a peptizer, water and urea to obtain a liquid mixture; (3) adding an aluminum source to an acid aqueous solution, performing pulping, and then adding the semi-sulfurized material and the liquid mixture to the slurry; (4) performing rapid evaporation and concentration on the slurry to obtain concentrated slurry, and then performing slow drying treatment to obtain a semi-dried material; (5) performing rolling and extruding forming on the semi-dried material obtained in step (4), and performing roasting to obtain the sulfurized type hydrogenation catalyst. Catalyst preparation and sulfurization are finished simultaneously, pore size distribution of the catalyst is centralized, the preparation process is simple, and broader market application prospect is provided.

Description

technical field [0001] The invention relates to a preparation method of a sulfurized hydrogenation catalyst. Background technique [0002] Hydrofining, hydrotreating, hydrocracking and other oil refining catalytic hydrogenation production processes are environmentally friendly oil refining production processes, which can be widely used in the production of clean petroleum products such as gasoline, kerosene, diesel oil, lubricating oil, and paraffin. With the continuous upgrading of product quality, increasingly stringent environmental protection regulations, and increasingly inferior and heavy crude oil, hydrogenation technology has been widely valued and applied all over the world. The processing capacity of hydrogenation units in my country's oil refineries continues to grow, and the demand for hydrogenation catalysts is increasing year by year, and most of these catalysts can only obtain better performance after sulfidation. The presulfidation of catalysts (conversion o...

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Problems solved by technology

Among them, the catalyst prepared by way 1 contains elemental sulfur and the hydrogenation active metal component is added step by step, that is, the elemental sulfur and the carrier precursor auxiliary and auxiliary agent are mixed first, and then combined with the active metal component after a certain heat treatment. Therefore, elemental sulfur first interacts with the carrier material, and it is difficult to interact well with the active metal component, which is not conducive to the vulcanization reaction of the active metal component, thereby affecting the utilization rate of the active metal and reducing the catalyst activity; Mode 2 When preparing the catalyst, the active metal component is directly mixed with the carrier precursor, elemental sulfur, auxiliary agent, and forming aid, and there is also the problem that the interaction effect of the active metal component and the elemental sulfur is not good.

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