Dispersion method of suspension bed hydrogenation catalyst

Abstract

The invention relates to a dispersion method of a suspension bed hydrogenation catalyst, wherein the suspension bed hydrogenation catalyst is formed by a water-soluble catalyst and an oil-soluble catalyst. The dispersion method includes: adding a foaming agent to the water-soluble catalyst, and placing an obtained solution in a high-speed stirrer for stirring to enrich foam to obtain a foaming system; dissolving the oil-soluble catalyst in a surfactant solution prior to dropwise dropping into the foaming system to obtain CLA (colloidal liquid aphron); adding the obtained CLA into heavy-oil material for stirring to allow a mixture to enter a reaction system via stream stripping. The method is simple in foaming process, subsequent stripping dehydration process load can be reduced by reducingdispersion system moisture content through enrichment of catalytic active components by the foam, catalyst granules can be evenly and finely dispersed in raw oil, and the dispersion effect is betterthan that of a traditional mode.

Description

technical field [0001] The invention relates to a dispersion method, in particular to a dispersion method of a suspension bed hydrogenation catalyst, and the method is especially suitable for the suspension bed hydrogenation catalyst dispersion process. Background technique [0002] Suspension-bed hydrogenation catalysts currently used are divided into two categories: oil-soluble catalysts and water-soluble catalysts. Oil-soluble catalysts are easy to disperse and have high hydrogenation activity, but are expensive and have poor coke loading performance. The water-soluble catalyst is cheap and requires a large amount of input, so the coke loading performance is also better than that of the oil-soluble catalyst, but it is difficult to disperse because it is not easily miscible with residual oil. Studies have shown that the combination of the two catalysts has a synergistic effect. The dispersion of catalyst in raw oil is one of the key steps in the suspension bed hydrogenat...

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Problems solved by technology

The above-mentioned suspended bed hydrogenation catalyst and its dispersion method in heavy oil have the following problems: the specific surface area of ​​the aqueous solution is small, and it is easy to aggregate and form larger droplets in the immiscible residual oil system, which is the fundamental factor for the poor dispersion effect ; The water content of the catalyst raw material aqueous solution is relatively high, which will cause a large burden on the subsequent stripping and demulsification

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