Preparation method of sulfurization type hydro-treatment catalyst

Abstract

The invention provides a preparation method of a sulfurization type hydro-treatment catalyst. The preparation method comprises the following steps: adding water into carrier powder, pulping so as to obtain slurry (d), adding an ammonium molybdate and / or ammonium tungstate solution (a), an ammonium sulphide solution (b), and a nickel salt and / or cobalt salt solution (c) into the slurry (d) to carry out reactions, adding a surfactant at the same time, filtering, washing, and drying the reaction product in the protection of inert gas, adding an adhesive, kneading, extruding into strips, forming, drying in the protection of inert gas, and finally burning so as to obtain the sulfurization type hydro-treatment catalyst. The preparation method makes the active metal be evenly distributed on the carrier so as to generate more II type Ni(Co)Mo(W)S active phases with a higher activity; thus the catalyst has a high sulfurization degree and a high utilization rate of active metal, so that the hydrogenation performance of the catalyst is improved.

Description

technical field [0001] The invention relates to a preparation method of a sulfurized hydrotreating catalyst. Background technique [0002] Most of the metal active components of the current industrialized hydrotreating catalysts exist in the form of oxides, but in actual use, the active metal oxides on the catalyst need to be converted into sulfides. Therefore, the catalysts need to be sulfurized or Called pre-vulcanization. [0003] Conventional catalyst vulcanization methods use "in-vessel" vulcanization or "in-situ" vulcanization, that is, the catalyst in the oxidized state is first loaded into the hydrogenation reactor, and then hydrogen and sulfurizing agent are introduced into the reactor during the process of continuous heating. Pre-sulfurization, this method brings the following problems: (1) special pre-sulfurization equipment should be set up on the hydrogenation unit; (2) the vulcanizing agent added during the vulcanization process and the water and hydrogen sulf...

AI Technical Summary

Problems solved by technology

[0003] Conventional catalyst vulcanization methods use "in-vessel" vulcanization or "in-situ" vulcanization, that is, the catalyst in the oxidized state is first loaded into the hydrogenation reactor, and then hydrogen and sulfurizing agent are introduced into the reactor during the process of continuous heating. Pre-sulfurization, this method brings the following problems: (1) special pre-sulfurization equipment should be set up on the hydrogenation unit; (2) the vulcanizing agent added during the vulcanization process and the water and hydrogen sulfide generated by the reaction can easily cause high pressure Corrosion of reactors and related equipment, resulting in equipment damage and potential safety hazards; (3) The vulcanization process is longer, delaying the start-up time

(4) The vulcanizing agent used is flammable and toxic, and pollutes the environment during the vulcanization process; (5) The cost of pre-vulcanization in the device is relatively high

The above-mentioned methods all carry out pre-sulfurization treatment to the ready-made oxidized catalyst, so there are following deficiencies in the preparation process: the oxide MoO of hydrogenation catalyst active metal Mo, W, Co, Ni 3 、WO 3 , CoO, NiO have a strong interaction with the surface of the support, resulting in difficult and incomplete sulfidation of the active metal component, reducing the hydrogenation activity of the catalyst, and causing serious environmental pollution during the sulfidation process

The method is simple in process and high in sulfuration degree, so that the prepared sulfurized hydrogenation catalyst has high activity and selectivity, but the catalyst prepared by kneading method has poor metal dispersion uniformity and low metal utilization rate, which affects the activity and selectivity of the catalyst. product nature