Method for hydrotreating high-sulfur and high-metal residual oil

Abstract

The invention provides a method for hydrotreating high-sulfur and high-metal residual oil, which comprises the following steps: the residual oil and catalytic cracking recycle oil are in contact with The invention provides a method for hydrotreating high-sulfur and high-metal residual oil, which comprises the following steps: the residual oil and catalytic cracking recycle oil are in contact witha residual oil hydrogenation catalyst in the presence of hydrogen gas and under the hydrotreating reaction condition so as to carry out a hydrotreating reaction; the reaction product is separated to oa residual oil hydrogenation catalyst in the presence of hydrogen gas and under the hydrotreating reaction condition so as to carry out a hydrotreating reaction; the reaction product is separated to obtain gas, hydrogenated naphtha, hydrogenated diesel oil and hydrogenated residual oil. The residual oil hydrogenation catalyst is a combination of at least two catalysts, namely, an up-flow reactor cbtain gas, hydrogenated naphtha, hydrogenated diesel oil and hydrogenated residual oil. The residual oil hydrogenation catalyst is a combination of at least two catalysts, namely, an up-flow reactor catalyst and a fixed-bed hydrogenation catalyst and the two catalysts are respectively put in an up-flow reactor and a fixed-bed reactor; the ratio of the up-flow reactor catalyst and the fixed-bed hydatalyst and a fixed-bed hydrogenation catalyst and the two catalysts are respectively put in an up-flow reactor and a fixed-bed reactor; the ratio of the up-flow reactor catalyst and the fixed-bed hydrogenation catalyst is 30:70 to 70:30. The method can treat the high-sulfur and high-metal residual oil and effectively slow down the ascending speed of the pressure drop of the fixed-bed catalyst bedrogenation catalyst is 30:70 to 70:30. The method can treat the high-sulfur and high-metal residual oil and effectively slow down the ascending speed of the pressure drop of the fixed-bed catalyst bed, thus realizing the long-term running of the device. Besides, the method can combine the residual oil hydrotreating and catalytic cracking more effectively and has better implementation effect., thus realizing the long-term running of the device. Besides, the method can combine the residual oil hydrotreating and catalytic cracking more effectively and has better implementation effect.

Description

technical field [0001] The invention belongs to a method for treating hydrocarbon oil in the presence of hydrogen, more particularly, a method for hydrotreating high sulfur and high metal content residual oil. Background technique [0002] With the development of my country's national economy, my country's crude oil imports have increased rapidly year by year in recent years, and Middle Eastern crude oil with high sulfur and high metals accounts for a large proportion of imported crude oil. Therefore, the processing and full utilization of high-sulfur and high-metal residue oil is becoming a major issue today. [0003] Among the various methods for lightening residual oil, it is a good process to firstly carry out hydrogenation treatment on the residual oil, and then carry out catalytic cracking processing on the hydrogenated tail oil. The residue oil is hydrotreated to remove impurities such as metals, sulfur, nitrogen, etc., and the hydrogen conten...

AI Technical Summary

Problems solved by technology

However, this method cannot process residue oil with high metal content, or when processing residue oil with high metal content, the operation cycle is short

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