Suspended bed hydrocracking catalyst for coal tar and preparation method thereof

Abstract

The invention discloses a suspended bed hydrocracking catalyst for coal tar and a preparation method thereof. The preparation method comprises the following specific steps: adding a ferrous sulfate solution into semi-coke powder suspension, conducting stirring, adjusting a pH value through ammonia water, and then introducing air for an oxidation reaction so as to obtain a semi-coke powder suspension b loaded with an iron compound; then adding regenerated powder of a waste cobalt-molybdenum-nickel series hydrocracking catalyst into the suspension b, successively carrying out stirring, filteringand drying to obtain solid powder containing semi-coke, the iron compound and the regenerated powder of the waste cobalt-molybdenum-nickel series hydrocracking catalyst; and finally, uniformly mixingthe solid powder with red mud powder to obtain the suspended bed hydrocracking catalyst for coal tar. The catalyst prepared by using the method provided by the invention can effectively improve the conversion rate of heavy oil in coal tar and increase the yield of light oil, and is low in coking rate and relatively low in catalyst cost, so the economic benefit of a device can be obviously improved.

Description

technical field [0001] The invention belongs to the technical field of catalyst preparation, and in particular relates to a coal tar suspended bed hydrocracking catalyst, and also relates to a preparation method of the catalyst. Background technique [0002] At present, the combined process of fixed bed hydrorefining and fixed bed hydrocracking or the combined process of delayed coking and fixed bed hydrocracking are mostly used for coal tar processing. In the fixed bed hydrocracking process, there are many mechanical impurities in the raw material and the molecular weight of the oil product is large, which may easily cause the pressure drop of the reactor to increase. In addition, there are problems such as fast coking and deactivation of the catalyst, short service life, high investment cost, and short operation period of the device. In contrast, the suspended bed hydrogenation process passes highly dispersed fine particle catalysts or additives together with raw oil and h...

AI Technical Summary

Problems solved by technology

The catalysts mentioned above are used in the hydrocracking process of coal tar or heavy oil suspension bed. Although the conversion rate of heavy oil is high, the main problem is that the cost of the catalyst itself is high, and it cannot be practically applied in production practice.