A kind of high dry point heavy distillate oil hydrocracking method

Abstract

The invention discloses a hydrocracking method for heavy distillate oil with high dry point. Heavy distillate oil with high dry point and hydrogen enter the first stage reaction zone for hydrofining reaction, and the denitrification rate of the first stage is controlled to be 60% to 95%; the reaction effluent enters the separator for separation, and the obtained liquid and hydrogen enter the second stage Hydrofining reaction is carried out in the second-stage reaction zone; the second-stage reaction effluent can be mixed with supplementary hydrogen and then enter the third-stage reaction zone for hydrocracking reaction; the hydrogenation reaction effluent is separated and fractionated to obtain various hydrogenation cracking products. The method of the present invention can carry out hydrotreating on the nitrogen-containing impurities in the raw material with high dry point under relatively moderate conditions, so that it can meet the requirements of hydrocracking feed, thereby broadening the source of raw materials for hydrocracking; The temperature is greatly reduced, which can increase the operating cycle of the device, process heavier raw materials or increase the processing capacity of the device under the same operating cycle.

Description

Technical field [0001] The present invention disclosed a hydrogenation method, especially a hydrogenation method for processing high -drying and heavy distillation oil. Background technique [0002] With the rapid development of my country's economy, oil processing capacity has grown rapidly.At the same time, domestic hydrogenation technologies have also obtained large -scale industrial applications. As of the end of 2011, there are more than 40 sets of hydrogenation and cracking devices in my country. second.In addition, as the quality of domestic crude oil has deteriorated year by year, the processing volume of high -sulfur crude oil has increased significantly, the requirements of environmental protection for oil refining technology and oil products are becoming more stringent, and the market's demand for clean fuel and chemical raw materials has continued to increase, especially in particularAs a clean intermediate distillation of transportation fuel, and high -quality feed p...

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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