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Hydro-cracking method for reducing bromine index of heavy naphtha and increasing smoke point of aviation kerosene

A technology for hydrocracking and heavy naphtha, which is applied in the petroleum industry, hydrotreating process, processing hydrocarbon oil, etc. Problems such as unqualified soot point, to achieve the effect of inhibiting activity and inhibiting secondary cracking

Pending Publication Date: 2020-05-01
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] The purpose of the present invention is to solve the unqualified problem of heavy naphtha bromine index and aviation kerosene smoke point in medium-pressure hydrocracking unit, and provide a hydrocracking method for reducing heavy naphtha bromine index and increasing aviation kerosene smoke point, which can effectively improve The content of aromatics and naphthenes and the partial pressure of ammonia in the reactants can inhibit the secondary cracking reaction of paraffins, so as to achieve the purpose of reducing the bromine index of heavy naphtha and increasing the smoke point of aviation fuel

Method used

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  • Hydro-cracking method for reducing bromine index of heavy naphtha and increasing smoke point of aviation kerosene
  • Hydro-cracking method for reducing bromine index of heavy naphtha and increasing smoke point of aviation kerosene
  • Hydro-cracking method for reducing bromine index of heavy naphtha and increasing smoke point of aviation kerosene

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Embodiment 1

[0032] Taking Daqing VGO as the raw material oil, FF-36 as the hydrorefining agent, and FC-46 as the hydrocracking agent, the actual operating process conditions are shown in Table 3, and the reaction pressure is set at 12 MPa. After the low-fraction oil enters the fractionation tower, the jet fuel fraction enters the separator to be cut into light and heavy jet fuel, and the cutting point is 220°C. The mass ratio of light aviation kerosene to the jet kerosene product out of the unit is 1.0, and pyrrole is injected at the nitrogen injection point, and the mass ratio of injection amount to light aviation kerosene is 0.01. The mixture of aromatic nitrogen compound and light aviation coal enters each hydrocracking reactor area uniformly from the first bed layer.

Embodiment 2

[0034] Taking Daqing VGO as the raw material oil, FF-36 as the hydrorefining agent, and FC-46 as the hydrocracking agent, the actual operating process conditions are shown in Table 3, and the reaction pressure is set at 12 MPa. After the low-fraction oil enters the fractionation tower, the jet fuel fraction enters the separator to be cut into light and heavy jet fuel, and the cutting point is 220°C. The mass ratio of light aviation kerosene to the jet kerosene product out of the unit is 1.0, and pyrrole is injected at the nitrogen injection point, and the mass ratio of injection amount to light aviation kerosene is 0.01. The mixture of aromatic nitrogen compound and light aviation coal enters each hydrocracking reactor area from the first bed layer, and the circulation ratio along the flow direction is 1.5.

Embodiment 3

[0036] Taking Daqing VGO as the raw material oil, FF-36 as the hydrorefining agent, and FC-46 as the hydrocracking agent, the actual operating process conditions are shown in Table 3, and the reaction pressure is set at 12 MPa. After the low-fraction oil enters the fractionation tower, the jet fuel fraction enters the separator to be cut into light and heavy jet fuel, and the cutting point is 220°C. The mass ratio of light aviation kerosene to the jet kerosene product out of the unit is 1.0, and pyrrole is injected at the nitrogen injection point, and the mass ratio of injection amount to light aviation kerosene is 0.01. The mixture of aromatic nitrogen compound and light aviation coal enters each hydrocracking reactor area from the second bed layer, and the circulation ratio along the flow direction is 1.5.

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Abstract

The invention discloses a hydro-cracking method for reducing bromine index of heavy naphtha. The method comprises the following steps: mixing raw oil and hydrogen, then introducing the mixture into ahydro-refining reactor, carrying out a hydro-refining reaction; introducing the reaction effluent into a hydro-cracking reactor, introducing the oil generated by hydro-cracking into a fractionating tower after going through a high-pressure separator and a low-pressure separator so as to obtain dry gas, liquefied gas, light naphtha, heavy naphtha, light aviation kerosene, heavy aviation kerosene, diesel oil and tail oil, and returning part or all of the light aviation kerosene to the hydro-cracking reactor. According to the method, the content of aromatic hydrocarbons and cyclo-alkane in reactants and ammonia partial pressure can be effectively improved, and secondary cracking reaction of paraffin is inhibited, so that the purposes of reducing the bromine index of heavy naphtha and increasing aviation kerosene smoke point are achieved.

Description

technical field [0001] The invention relates to a hydrocracking method for reducing the bromine index of heavy naphtha and increasing the smoke point of aviation coal, especially suitable for processing paraffin-based wax oil in the medium-pressure hydrocracking process without large-scale modification of the device , the goal of reducing the bromine index of heavy naphtha and increasing the smoke point of jet fuel can be achieved only by adjusting the process operation method. Background technique [0002] Hydrocracking technology has the characteristics of high production flexibility, strong adaptability of raw materials and high product quality, and plays a mainstay role in adjusting the production balance of the whole plant. Hydrocracking process products include natural gas, liquefied petroleum gas, naphtha, jet fuel, diesel and tail oil. Traditional hydrocracking technology mainly produces naphtha or middle distillates according to market changes. Hydrocracking units...

Claims

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Application Information

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IPC IPC(8): C10G67/02
CPCC10G67/02C10G2300/30
Inventor 曹正凯吴子明王仲义崔哲彭冲孙士可
Owner CHINA PETROLEUM & CHEM CORP
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