A kind of hydrogenation treatment method of high nitrogen raw material

Abstract

The invention relates to a hydroprocessing method of high-nitrogen raw materials. High-nitrogen heavy distillate oil is adopted as the raw materials. A two-section technological process is adopted. Under hydrofining conditions, the heavy distillate oil raw materials and hydrogen are mixed and fed into a first-section reaction zone. A hydrofining catalyst is adopted in the first-section reaction zone. The denitrification percent in the first-section reaction zone is controlled to be 20-70%. A gas phase obtained by gas-liquid separation of effluents of the first-section reaction zone is reused after the gas phase is subjected to a purity removal step. A liquid phase obtained by gas-liquid separation of the effluents of the first-section reaction zone is fed into a second-section reaction zone to be subjected to a hydroprocessing reaction. The hydrofining catalyst is adopted in the second-section reaction zone. Effluents of the second-section reaction zone are fed into a separation system to obtain a hydroprocessing reaction product. Compared with the hydroprocessing technologies at present, the hydroprocessing method provided by the invention can largely improve the product quality and enhance processing capability of a device, or can reduce the operating pressure and reduce the operating cost under the same product quality and the same processing capability.

Description

technical field [0001] The invention discloses a hydrogenation treatment method, in particular to a two-stage hydrogenation treatment method for processing high-nitrogen raw materials. Background technique [0002] With the rapid development of my country's national economy, the oil processing capacity has grown rapidly. At the same time, the price of crude oil remains high, so that the proportion of crude oil purchase cost in the total refining cost has risen sharply, and the profit margin of refiners has been greatly reduced. In addition, due to the deterioration of crude oil quality year by year, the substantial increase in the processing volume of imported high-sulfur and high-nitrogen 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 oil products and chemical raw materials, making The market has put forward higher requirements for the ...

AI Technical Summary

Problems solved by technology

CN101007964 discloses a hydrogenation method for producing high-quality catalytic cracking raw materials, but its operating pressure is low, and it is not suitable for processing high-nitrogen raw materials. CN101987967 discloses a hydrogenation method for vacuum deep-drawing wax oil, which adopts a two-stage flow process, However, the first stage uses a hydrogenation protection agent and demetallization protection agent with very weak activity, and the second stage uses a hydrodesulfurization and hydrodenitrogenation catalyst. When processing raw materials with high nitrogen content, the overall activity of the catalyst is low. The amount is not high, or the processing depth is not high

[0005] In view of the deterioration of crude oil quality, the increase of impurity content, and the development of crude oil decompression deep pressure and other unconventional energy sources, the impurity content of raw materials for hydroprocessing is getting higher and higher, especially the nitrogen content of some raw materials for hydroprocessing is relatively high. However, when the existing hydrogenation treatment method deals with the hydrogenation feedstock with high nitrogen content, higher reaction temperature, higher reaction pressure or lower operating space velocity are required, the processing capacity of the device will decrease, and the energy consumption will increase at the same time. Operation cycle shortened

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