Hydrogenation activity protection catalyst, preparation and application thereof

Abstract

The invention relates to a hydrogenation activity protection catalyst, preparation and an application thereof. The hydrogenation activity protection catalyst contains an alkaline earth metal component-containing carrier and a hydrogenation activity metal component, wherein the carrier has a bimodal pore structure and is characterized through a mercury injection method, the pore volume of the carrier is 0.9-1.2 ml / g, the specific surface area is 50-300 m<2> / g, the pore volume of the pores having a diameter of 10-30 nm accounts for 55-80% of the total pore volume, and the pore volume of the pores having a diameter of 300-500 nm accounts for 10-35% of the total pore volume, wherein the carrier preparation comprises: mixing pseudoboehmite-containing hydrated alumina P1 and a modifier P2 of the P1, introducing an alkaline earth metal-containing compound into the obtained mixture, molding, drying and calcinating, wherein the k value of the P2 is more than or equal to 0 and is less than or equal to 0.9, the k is equal to DI2 / DI1, the DI1 is the acid dispersion index of the pseudoboehmite-containing hydrated alumina P1, and the DI2 is the acid dispersion index of the modifier P2 of the P1. Compared with the hydrogenation activity protection catalyst in the prior art, the hydrogenation activity protection catalyst of the present invention has good hydrogenation demetallization activity.

Description

technical field [0001] The invention relates to a hydrogenation active protection catalyst and its preparation and application. Background technique [0002] As crude oil becomes heavier and inferior, the difficulty of crude oil processing increases, and the yield of light oil products decreases. However, the market demand for high-quality light oil products continues to increase, and environmental protection regulations are becoming more and more inclusive. strict. At present, the processing and full utilization of heavy oil, especially residual oil, is becoming a major topic of concern in the global oil refining industry, and residual oil hydrogenation technology is a widely used processing technology in heavy oil processing technology, and is recognized as an economical and environmentally friendly deep processing technology . Residual oil contains a large amount of metal impurities such as Ni, V, Fe, Ca and solid impurities. If these impurities cannot be effectively re...

AI Technical Summary

Problems solved by technology

Residual oil contains a large amount of metal impurities such as Ni, V, Fe, Ca and solid impurities. If these impurities cannot be effectively removed, it will have an adverse effect on the downstream hydrogenation catalyst and easily deactivate the downstream catalyst.

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