Modified alumina dry glue powder, and preparation method and application thereof

Abstract

The invention discloses a preparation method of modified alumina dry glue powder. The method comprises the following steps: (1) preparing a mixed solution containing a modifying element and at least one of diethyl ethanolamine and polyethylene glycol, wherein the mass content of a modifying element precursor in the mixed solution is 5-30%, the mass content of the at least one of the diethyl ethanolamine and polyethylene glycol is 0.1-10%, and the modifying element is silicon, magnesium or zinc; (2) preparing an aluminum salt and a precipitant, performing a co-precipitation reaction to obtain asolution containing aluminum hydroxide sol, ageing the solution containing aluminum hydroxide sol for 10-30 min, adding the mixed solution prepared in step (1), and continuing the ageing, wherein theaddition amount of the mixed solution prepared in the step (1) makes the content of the modifying element (by oxide) in a final catalyst be 1-10%; and (3) filtering, washing and drying the obtained aged material to obtain modified alumina. The method facilitates the enrichment and high dispersion of the modifying element on the surface of the alumina carrier, and improves the physical and chemical properties of the alumina dry glue powder.

Description

technical field [0001] The invention relates to a modified alumina dry rubber powder and its preparation method and application, in particular to a modified alumina dry rubber powder suitable for a hydrogenation catalyst carrier and a preparation method thereof. Background technique [0002] With the increasing of heavy and inferior crude oil and the increasingly stringent requirements of environmental protection regulations, the requirements for light oil are constantly increasing. In order to meet the requirements of environmental regulations, hydrogenation is one of the main methods to reduce sulfide and nitrogen compounds in fuel oil. Catalysts play an important role in the hydrogenation process. At present, most of the catalysts used are based on alumina as the carrier, with Group VIII and / or Group VIB metals as active components. The surface properties of a single alumina cannot meet the requirements of the catalyst. For example, the interaction between the active me...

AI Technical Summary

Problems solved by technology

[0011] CN103785446A discloses a method for preparing a hydrocracking catalyst, the preparation steps of the catalyst prepared by this method are cumbersome, and the activity of the catalyst has not been fully improved

However, adding a stabilizer during the aging process is mainly to reduce the degree of aggregation of alumina particles to increase the crystallinity, and it brings many difficulties to the subsequent treatment. The generated sewage contains organic stabilizers, which will pollute the environment.