A kind of inferior raw material hydrocracking method

Abstract

The present invention discloses a poor-quality raw material hydrocracking method. According to the method, a poor-quality raw material is firstly subjected to a first-stage hydrorefining reaction, and the reaction effluent is separated; and the liquid enters a second-stage refining stage to carry out a deep denitrogenation and aromatic hydrocarbon saturation reaction, a gas-liquid co-current flow process and a gas-liquid counter flow process are concurrently adopted in the second stage, the refining generated oil obtained in the second stage and hydrogen gas are mixed and then enter a third-stage reaction zone to carry out a hydrocracking reaction. With the method of the present invention, the nitrogen-containing impurities in the poor-quality raw material can be subjected to hydrotreating under the relatively mild condition so as to make the poor-quality raw material meet the hydrocracking feeding requirement, such that the hydrocracking raw material source is broadened; and the hydrorefining temperature is substantially reduced so as to increase the operation period of the device and process the poor-quality raw material, or increase the processing capacity of the device in the same operation period.

Description

technical field

[0001] The invention discloses a hydrocracking method, in particular to a hydrocracking method for processing nitrogen-containing inferior raw materials. Background technique

[0002] With the rapid development of my country's economy, the oil processing capacity has grown rapidly. At the same time, domestic hydrocracking technology has also obtained large-scale industrial applications. By the end of 2011, there were more than 40 sets of hydrocracking units in operation in my country, with a total processing capacity of more than 50.0Mt / a, and the processing capacity leapt to the top of the world. second. In addition, due to the year-by-year deterioration of the quality of domestic crude oil, the substantial increase in the processing volume of imported high-sulfur crude oil, the increasingly stringent requirements for environmental protection on the refining process and the quality of petroleum products, and the increasing market demand for clean fuel oil an...

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