A kind of high dry point raw material hydrocracking process

Abstract

The present invention discloses a high dry point raw material hydrocracking process. According to the high dry point raw material hydrocracking process, a high dry point raw material firstly is subjected to a first-stage hydrorefining reaction, and a gas-liquid co-current flow process and a gas-liquid counter flow process are concurrently adopted in the first stage; the generated oil obtained in the first stage enters a second-stage refining stage to carry out a deep denitrogenation and aromatic hydrocarbon saturation reaction, and a gas-liquid co-current flow process is adopted in the second stage; and the second-stage reaction effluent is mixed with supplemental hydrogen gas, and then enters a third-stage reaction zone to carry out a hydrocracking reaction. With the method of the present invention, the nitrogen-containing impurities in the high dry point raw material can be subjected to hydrotreating under the relatively mild condition so as to make the high dry point 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 process, in particular to a hydrocracking process for processing raw materials with high dry point. 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. At the same time, the world's crude oil resources are increasingly depleted, and the international oil price has been hovering at a high level. In 2011, my country imported a total of 254 million tons of crude oil, and the dependence on crude oil imports has reached 56.5%, which has seriously threatened the healthy and rapid development of the national economy. Ma...

AI Technical Summary

Problems solved by technology

In addition to slowing down the diffusion of raw oil into the catalyst due to the increase in viscosity, thereby reducing the reaction rate, it also brings more non-hydrocarbon compounds with more complex structures, polycyclic aromatic hydrocarbons, gums, asphaltenes, and heavy metals. and other impurities, greatly increasing the difficulty of hydrogenation

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