Preparation method of hydrogenation catalyst of hydrocarbon

Abstract

The invention relates to the preparing method of an alkanes hydrogenating catalyst. The carrier of the catalyst is gamma-Al2O3, the active ingredient is VIB group and VIII group metals and the active accessory ingredient is Ti. Ti is led in the aluminum hydroxide gel. It adopts second-aging in the stage of gel-forming so it can ensure the uniform disperse of Ti on the aluminum hydroxide surface and larger bore volume, larger specific surface area and larger aperture. The invention adopts complete mix-and-pinch method to prepare the catalyst. The processing procedure comprises the following steps: adding alkaline solution that contains Mo and / or W to the second-aging aluminum hydroxide dry gel powder which contains Ti; mixing and pinching fully until the aluminium hydrate powder is totally sodden by alkaline solution; adding acid solution that contains Co and / or Ni, mixing and pinching until the material is able to be molded; squeezing the materials to be strips; drying and calcinating. Ti spreads more uniformly on the catalyst made in the invention; the function of the catalyst also improves substantially.

Description

technical field [0001] The invention relates to a preparation method of a hydrocarbon hydrogenation treatment catalyst, in particular to a preparation method of a hydrocarbon hydrogenation desulfurization catalyst. Background technique [0002] Hydroprocessing is an important process technology in hydrocarbon processing, mainly including hydrodesulfurization, hydrodenitrogenation, hydrocracking, etc. The key to hydroprocessing technology lies in the catalyst. At present, most catalysts for hydrocarbon hydroprocessing are alumina The carrier uses Mo and / or W and Ni and / or Co as active components. In order to achieve maximum economic benefit, improving catalyst performance and reducing cost are the goals pursued in this field. [0003] Generally, simplifying the catalyst preparation process can greatly reduce the production cost of the catalyst, such as US Patent 4,443,558, which uses a complete kneading method instead of the "impregnation method" or "mixed impregnation combi...

AI Technical Summary

Problems solved by technology

CN 1289636A discloses a method for preparing titanium-containing aluminum hydroxide by precipitating titanium salt in aluminum hydroxide slurry, which can prepare well-dispersed titanium-containing aluminum hydroxide, but because the titanium salt solution contains Cl - and SO 4 2- Plasma, corrosion equipment, and roasting into γ-Al in aluminum hydroxide 2 o 3 Gases such as chlorine and sulfur dioxide will be produced to pollute the environment; for this reason CN 1324687A has announced a carbonization method to add fine metatitanic acid, TiO 2 The method for preparing titanium-containing aluminum hydroxide reduces environmental pollution, but the titanium-containing aluminum oxide has low pore volume and specific surface area, and its use is limited; CN 03133554.3 discloses a method for preparing titanium-containing hydrogen oxide with large pore volume and specific surface area. Alumina method, but it uses ultrasonic waves in the aluminum hydroxide gelling process, and its use is limited due to the need for special equipment and possible noise pollution