Hydrocracking catalyst containing amorphous aluminum silicide and preparation thereof

Abstract

The present invention provides a hydrocracking catalyst containing amorphous silica-alumina and preparing method. The amorphous silica-alumina in the catalyst employs parallel current coexisting method, not only has a simple process, easily controlling, but also employs CO2 and wind mixing, the reactant is adequately mixed, silica and alumina are effectively mutual action, a large specific surface area and a large specific pore volume are formed, pore distribution is very concentrative, 4-10nm pore volume is about 85%-95% of the total pore volume, pore volume which aperture is bigger than 15nm, is below 5% of the total pore volume. The amorphous silica-alumina provides enough channel to the reactant, benefits for enter and exit of reactant and resultant, greatly enhances effectively element of carrier, enhances the homogeneity of the acid center distributing on the channel, in addition, the invention provides larger space and specific surface to carry metal, the hydrogenation metal has high dispersivity, the catalyst not only has feasible schizolysis activity, but also bas high hydrogenation activity and medium oil selectivity.

Description

Technical field [0001] The invention relates to a hydrocracking catalyst and a preparation method thereof, in particular to a hydrocracking catalyst containing amorphous silicon and aluminum for processing heavy hydrocarbon raw materials and producing middle distillate oil. Background technique [0002] Since the beginning of the 21st century, the crude oil processed by the world's refineries has become heavier, the sulfur and heavy metal content in crude oil has risen significantly, and the environmental protection regulations of various governments have become increasingly stringent. Clean production processes must be adopted to make the most effective use of petroleum resources, reduce material consumption, energy consumption and pollutant emissions in the production process, and produce environmentally friendly petroleum products. As a clean production process for deep processing of heavy oil, hydrocracking meets the requirements of sustainable development. Therefore, the hyd...

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Problems solved by technology

The specific surface and pore volume of the amorphous silica-alumina are low, which cannot provide higher metal dispersion for active components, and the acidity is also low, so it is not suitable for use as a carrier for cracking catalysts

[0008] CN 1597093A introduces a kind of amorphous silicon aluminum prepared by carbonization method, intermittent production operation, SiO 2 The content is 8% to 50%, but the pore volume and specific surface area are relatively low, and the pore distribution is not concentrated, which needs further improvement

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