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A method for hydrocracking prolific jet fuel

A hydrocracking and hydrofining technology, which is applied in the fields of hydrotreating process, hydrocarbon oil treatment, petroleum industry, etc., can solve the problems of low saturation depth of aromatics, unqualified product quality, high content of aromatics, etc., and achieve high yield, The effect of low operation cost and low investment

Active Publication Date: 2020-11-06
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] This is because medium-pressure hydrocracking is limited by thermodynamic equilibrium, the saturation depth of aromatics is low, and the product quality, especially the smoke point of jet fuel, is unqualified. Moreover, heavy wax oil and catalytic diesel oil are not suitable for medium-pressure hydrocracking due to their high aromatics content. Raw material for hydrocracking to produce jet fuel

Method used

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  • A method for hydrocracking prolific jet fuel
  • A method for hydrocracking prolific jet fuel
  • A method for hydrocracking prolific jet fuel

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] A mixed raw material of 65wt% straight-run diesel oil, 28wt% vacuum gas oil and 7wt% coker gas oil is used.

[0032] S1 First, the raw oil and new hydrogen enter the high-pressure separator 2 after undergoing hydrotreating in the first reactor 1;

[0033] S2 Then, the liquid phase stream 9 of the high-pressure separator 2 enters the low-pressure separator 3 and the fractionating tower 4 successively, and the naphtha 10 and the jet fuel fraction 11 are cut out through the fractionating tower 4;

[0034] S3 Then, the gas phase product 8 of the high pressure separator 2 is compressed by the recycle compressor 6 and enters the second reactor 5 with the bottom material 12 of the fractionation tower 4 for hydrocracking reaction;

[0035] S4 Finally, the reaction effluent 7 of the second reactor 5 is recycled back to the first reactor 1 .

[0036] Among them, the reaction conditions of the first reactor 1 are: the pressure is 13MPa, the temperature is 375°C, and the volume sp...

Embodiment 2

[0044] Straight-run diesel oil from atmospheric distillation unit is used as raw material, and its distillation range is 230-352°C.

[0045] S1 First, the raw oil and new hydrogen enter the high-pressure separator 2 after undergoing hydrotreating in the first reactor 1;

[0046] S2 Then, the liquid phase stream 9 of the high-pressure separator 2 enters the low-pressure separator 3 and the fractionating tower 4 successively, and the naphtha 10 and the jet fuel fraction 11 are cut out through the fractionating tower 4;

[0047] S3 Then, the gas phase product 8 of the high pressure separator 2 is compressed by the recycle compressor 6 and enters the second reactor 5 with the bottom material 12 of the fractionation tower 4 for hydrocracking reaction;

[0048] S4 Finally, the reaction effluent 7 of the second reactor 5 is recycled back to the first reactor 1 .

[0049] Among them, the reaction conditions of the first reactor 1 are: the pressure is 6.4MPa, the temperature is 350°C,...

Embodiment 3

[0058] A mixed raw material of 50wt% straight-run diesel oil, 25wt% vacuum gas oil and 15wt% coker gas oil is used.

[0059] S1 First, the raw oil and new hydrogen enter the high-pressure separator 2 after undergoing hydrotreating in the first reactor 1;

[0060] S2 Then, the liquid phase stream 9 of the high-pressure separator 2 enters the low-pressure separator 3 and the fractionating tower 4 successively, and the naphtha 10 and the jet fuel fraction 11 are cut out through the fractionating tower 4;

[0061] S3 Then, the gas phase product 8 of the high pressure separator 2 is compressed by the recycle compressor 6 and enters the second reactor 5 with the bottom material 12 of the fractionation tower 4 for hydrocracking reaction;

[0062] S4 Finally, the reaction effluent 7 of the second reactor 5 is recycled back to the first reactor 1 .

[0063] Among them, the reaction conditions of the first reactor 1 are: the pressure is 10MPa, the temperature is 375°C, and the volume s...

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Abstract

The invention discloses a method for high-yield production of aviation kerosene through hydrocracking. The method comprises that S1, raw material oil and new hydrogen are subjected to hydrorefining bya first reactor, and the obtained material enters a high pressure separator; S2, the liquid phase stream flow of the high pressure separator sequentially enters a low pressure separator and a fractionation tower, and naphtha and aviation kerosene distillate are extracted by the fractionation tower; S3, the gas phase product of the high pressure separator is compressed, and the compressed materialand the bottom material of the fractionation tower enter a second reactor, and are subjected to a hydrocracking reaction; and S4, the reaction effluent of the second reactor is circulated to the first reactor. According to the present invention, the fractionation tower is arranged between the hydrorefining reactor and the hydrocracking reactor, such that the influence of excessive cracking on theyield of aviation kerosene can be avoided, and the cracked aviation kerosene distillate is subjected to aromatic hydrocarbon saturation so as to improve the property of the aviation kerosene distillate.

Description

technical field [0001] The invention belongs to a method for hydrocracking and producing jet fuel. The hydrorefining reactor is used as raw material pretreatment for desulfurization and denitrification and hydrogenation and saturation of jet fuel aromatics. While cutting the hydrocracking products between the cracking reactors, the jet fuel fraction in the raw material is cut in time to avoid excessive cracking. Background technique [0002] Hydrocracking technology, as an important processing method for lightening heavy oil, upgrading inferior oil products and refining and chemical integration, has the advantages of flexible production plan, strong adaptability of raw materials, high selectivity of target products, good quality and high added value of tail oil . In recent years, the diesel-to-gasoline ratio has continued to decrease, the demand for diesel has grown slowly, and the self-sufficiency rate of aviation kerosene, chemical and aromatic raw materials is seriously ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10G67/14
CPCC10G67/14C10G2300/1037C10G2300/202
Inventor 袁晓亮张占全张志华王燕王延飞余颖龙谢斌张雅琳付凯妹翟绪丽庄梦琪王晶晶王嘉祎
Owner PETROCHINA CO LTD
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