A kind of residual oil hydrotreating method

Abstract

A residual oil hydrogenation treatment method includes the steps of: under hydrotreating reaction conditions, contacting the residual oil feedstock with a catalyst composition containing by volume 5-60% of a hydrotreating catalyst I, 5-50% of a hydrotreating catalyst II and 10-60% of a hydrotreating catalyst III. The hydrotreating catalyst I contains a molding alumina carrier containing IV B metal component, and characterized by the mercury injection method, the carrier has pore volume of 0.95-1.2 ml / g and specific surface area of 50-300 m<2> / g, and the carrier is in doublet pore distribution in the diameters of 10-30 nm and 300-500 nm, wherein pores with diameter of 10-30nm accounts for 55-80% of the total pore volume and pores with diameter of 300-500 nm accounts for 10-35% of the total pore volume. Compared with the prior art, the method provided by the invention has better residual oil hydrotreatment performance.

Description

technical field [0001] The invention relates to a method for hydrotreating hydrocarbon oil. 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 hot topic 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 removed, it will have an adverse effect on the down...

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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