Nickel-containing pseudoboehmite and carrier prepared from nickel-containing pseudoboehmite

Abstract

The present invention provides nickel-containing pseudoboehmite and a carrier prepared from the nickel-containing pseudoboehmite. According to the present invention, in the nickel-containing pseudoboehmite prepared through the method, nickel and pseudoboehmite are organically combined, the active component nickel is effectively dispersed in the pseudoboehmite, the nickel-containing alumina carrier having the specific crystal form is formed, the good regulation effects are provided on the pore structure and the acidity of the carrier, and the finally-prepared catalyst has high hydrogenation activity; and compared to the catalyst prepared through the single use of the impregnation method, the catalyst of the present invention has the following advantages that the process is simple, the performance of the carrier material is easy to modulate, and the like.

Description

technical field [0001] The invention relates to a nickel-containing pseudo-boehmite and a carrier prepared therefrom, in particular to a method for preparing the nickel-containing pseudo-boehmite which is suitable for hydrogenation catalyst carrier materials. Background technique [0002] Hydrated alumina such as pseudo-boehmite and boehmite are widely used as raw materials for the preparation of alumina carriers, although methods such as pH swing method, addition of organic pore-enlarging agents, and hydrothermal treatment can be used in the preparation of alumina carriers. To improve the properties of alumina as a support, but these methods are limited to improve the performance of alumina as a support material for hydrogenation catalysts. The properties of the hydrated alumina raw materials used in the preparation of alumina supports are one of the most critical factors for the production of alumina supports with excellent performance. [0003] CN102029192B discloses a m...

AI Technical Summary

Problems solved by technology

Therefore, there are the following problems in the impregnation process: (1) due to the constant water absorption of the carrier, the volume of the impregnating solution using the equal volume impregnation method is constant, and the high addition of active metal components will cause incomplete dissolution; (2) the preparation of the catalyst process It is necessary to impregnate the active component multiple times in the medium, twice, three times or even four times to impregnate a certain amount of active component on the carrier, which causes problems such as complicated preparation process, long preparation cycle, and loss of active component; (3 ) In the process of multiple impregnation, it is often necessary to add organic or inorganic dispersants to the impregnation solution to increase the dispersion of active metal components, but these will have the problem of removal during post-treatment

However, the active metal compound and aluminum hydroxide dry rubber powder or alumina powder are directly mixed and formed by kneading method. This method has problems such as uneven mixing of crystal particles and deterioration of catalyst strength. It is not easy to combine with each other to form a specific skeleton structure

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