A preparation method of a silicon-containing macroporous alumina carrier and a hydrogenation treatment catalyst

Abstract

The invention provides a preparation method of a silicon-containing macroporous alumina carrier and a hydrotreating catalyst. The preparation method of the carrier comprises the steps of (1) dipping pseudo-boehmite dry glue powder into a water solution containing polyhydric alcohols and / or carbohydrates and then carrying out hydrothermal carbonization treatment on the dipped material; and (2) dipping carbon black powder into a silicon-containing solution, mixing and kneading the carbon black powder with pseudo-boehmite obtained in the step (1), an extrusion aid and a peptizing agent into a plastic body, carrying out extruding and drying, roasting the dried material under a nitrogen atmosphere and then roasting in an air atmosphere to prepare an alumina carrier containing silicon dioxide. The hydrotreating catalyst comprises the carrier and a hydrogenation active component. The alumina carrier prepared through the method has relatively high mechanical strength while having relatively large pore volume and pore diameter, and is suitable for the field of preparation of heavy oil or residual oil hydrodemetallization catalysts.

Description

technical field [0001] The invention belongs to the field of hydrogenation, and in particular relates to a method for preparing a silicon-containing macroporous alumina carrier and a hydrogenation catalyst. Background technique [0002] At present, in the production process of heavy oil hydrodemetallization, because the raw oil contains a certain amount of impurities such as vanadium, sulfur, arsenic, nickel, etc., it is easy to form deposits, thereby blocking the pores of the catalyst, resulting in a rapid decline in catalyst activity, and even Inactivation affects industrial applications. Catalysts with larger pore volume and larger pore diameter have strong metal and carbon storage capacity, which can slow down the deactivation of the catalyst and prolong the operation period of the catalyst. The pore structure of the catalyst is determined by the carrier that constitutes the catalyst. Therefore, the preparation of a carrier with a larger pore volume and larger pore diam...

AI Technical Summary

Problems solved by technology

However, during the molding process of the alumina carrier, it is necessary to knead pseudo-boehmite dry rubber powder, extrusion aids, peptizers, etc. The macropores of the body itself partially collapse, so that the pore volume and macropore content of the final carrier are greatly reduced

In addition, the mechanical strength of the alumina carrier prepared by the existing method needs to be further improved

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