Method for preparing superhigh metal load capacity hydrogenation catalyst

Abstract

The invention relates to a method for preparing a superhigh metal load capacity hydrogenation catalyst. The method comprises the following steps: depositing an aluminum source modifier on a carrier; metal, an organic complexing agent and deionized water are mixed; the mixed product is dipped on a carrier deposited with the aluminum source modifier; the carrier dipped with the mixed product is dried and roasted; wherein, the main metal components are Mo and W of VIB family, the auxiliary agent components are Co and / or Ni of VIII family; the aluminum source modifier is one or combination of aluminum isopropoxide, aluminum chloride and aluminum nitrate; the pore volume of the carrier deposited with the aluminum source modifier is 1.5-3.0 ml / g, the specific surface area is 400-800 m<2> / g, and the aperture proportion of the aperture with 15-20 nm is greater than 50%. According to the preparation method of the invention, catalyst activity is obviously increased by increasing the metal load capacity, the catalyst has a good pore structure and a large specific surface area; preparation flow of the catalyst is simplified, and the preparation cost of the hydrogenation catalyst with high metal content is reduced.

Description

technical field [0001] The invention relates to the technical field of petrochemical industry, in particular to a method for preparing a hydrogenation catalyst with an ultra-high metal loading capacity. Background technique [0002] In recent years, with people's increasing attention to environmental quality and the improvement of environmental protection awareness, higher requirements have been put forward for the production of vehicle fuels, especially vehicle diesel sulfur content and cetane number. National V and National The quality index of VI diesel oil requires ultra-low sulfur content (<10μg / g) in vehicle diesel. The cetane number of national V and national VI standard vehicle diesel should be greater than 51 and 53 respectively. To increase the cetane value of diesel Values ​​require deep hydrodearomatics. Currently, the hydrogenation process is the most effective way to achieve this goal, and high-performance hydrogenation catalysts are the key. [0003] The ...

AI Technical Summary

Problems solved by technology

But limited by the carrier γ-Al 2 o 3 Due to the limitation of pore volume and particle packing density, the hydrogenation catalyst prepared by metal solution impregnation method has better pore structure and larger specific surface area, but the loading of active metal is about 25-35wt%; When the load is increased, the active metal will block the pores of the catalyst, thereby reducing the specific surface area of ​​the catalyst and reducing the activity of the catalyst.

Images