Preparation method of Fischer-Tropsch synthesis kerosene and method for preparing semisynthetic aviation kerosene from Fischer-Tropsch synthesis kerosene

A technology of Fischer-Tropsch synthesis and aviation kerosene, which is applied in the petroleum industry, processing hydrocarbon oil, hydrotreating process, etc., can solve the problems of high production cost, and achieve the effects of low nitrogen content, low aromatics content and low sulfur content

Active Publication Date: 2021-07-13
CHINA ENERGY GRP NINGXIA COAL IND CO LTD
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AI Technical Summary

Problems solved by technology

Coal direct liquefaction synthetic aviation kerosene technology is representative of Germany's new liquefaction technology (IGOR), the United States (HTI) technology an

Method used

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  • Preparation method of Fischer-Tropsch synthesis kerosene and method for preparing semisynthetic aviation kerosene from Fischer-Tropsch synthesis kerosene
  • Preparation method of Fischer-Tropsch synthesis kerosene and method for preparing semisynthetic aviation kerosene from Fischer-Tropsch synthesis kerosene
  • Preparation method of Fischer-Tropsch synthesis kerosene and method for preparing semisynthetic aviation kerosene from Fischer-Tropsch synthesis kerosene

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preparation example Construction

[0040] The invention provides a kind of preparation method of Fischer-Tropsch synthetic kerosene, the method comprises the following steps:

[0041] (1) Fischer-Tropsch synthetic oil undergoes hydrorefining reaction, and after fractionation of the generated hydrorefined product, the tower top and sideline products are extracted to the finished product tank area, and the hydrorefined tail oil is subjected to hydrocracking reaction; the generated hydrocracking The product enters the fractionation tower for fractionation, the diesel component of the 160-350°C fraction is extracted from the side line, the crude naphtha component of the 45-205°C fraction is extracted from the top of the tower, and the rest is hydrocracking bottom oil; hydrogenation The cracked bottom oil is subjected to hydroisomerization reaction, and the generated hydroisomerization product enters the hydrocracking fractionation tower for fractionation. By adopting the aforementioned preparation conditions, the f...

Embodiment 1

[0072] (1) Fischer-Tropsch synthetic oil (n-paraffin content 93%) passes through the hydrotreating reactor, and the catalyst is MoO 3 , the operating conditions are: reaction temperature 290°C, reaction pressure 6.8MPa, hydrogen-oil ratio 500:1, volume space velocity 2.0h -1 ; The resulting refined product is subjected to vacuum fractionation to extract the top and sideline products; the fractionation conditions are 55 trays, a reflux ratio of 0.7:1, an operating pressure of 100kPa, and a bottom temperature of 350°C;

[0073] The refined tail oil is sent to the hydrocracking reactor, the mass ratio of the hydroisomerization catalyst to the hydrocracking catalyst is 1:6, and the catalyst filling sequence includes the lower protective agent (FZC-102N), the hydroisomerization catalyst (3 wt%MoO 3 / Al 2 o 3 : 3% by weight WO 3 / Al 2 o 3 =1:1), hydrocracking catalyst (3% by weight NiO / SiO 2 : 3% by weight MoO 3 / SiO 2 =1:1) and upper protective agent (FZC-102N), the operat...

Embodiment 2

[0078] (1) get 160~350 ℃ of diesel oil cuts and 45~205 ℃ of crude naphtha cuts in embodiment 1 step (1);

[0079] (2) Distill and cut the 160-350°C diesel oil fraction and 45-205°C crude naphtha fraction obtained in step (1). The cutting conditions of the diesel oil fraction are: reflux ratio at 5:1, operating pressure: 86kPa, Heating temperature at the bottom of the tower: 280°C, cut out the 150-260°C fraction as Fischer-Tropsch synthetic kerosene component A; cutting conditions for the crude naphtha fraction: reflux ratio at 5:1, operating pressure: 86kPa, heating temperature at the bottom of the tower : 160°C, cut out the distillate >150°C as Fischer-Tropsch synthetic kerosene component B; mix Fischer-Tropsch synthetic kerosene component A and component B according to the volume ratio of 2:1, and the mixed oil is used as Fischer-Tropsch synthetic kerosene components.

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Abstract

The invention provides a preparation method of Fischer-Tropsch synthesis kerosene. The method comprises the following steps: (1) carrying out hydrofining reaction on Fischer-Tropsch synthesis oil, fractionating the generated hydrofining product, extracting tower top and side line products, carrying out hydrocracking reaction on hydrofining tail oil, enabling the generated hydrocracking product to enter a fractionating tower, carrying out fractionation to obtain a diesel oil component at the fraction section of 160-350 DEG C and a crude naphtha component at the fraction section of 45-205 DEG C, carrying out a hydroisomerization reaction on hydrocracking vacuum bottom oil, enabling the generated hydroisomerization product to enter a hydrocracking fractionating tower, and carrying out fractionation; and (2) mixing the diesel oil component and the crude naphtha component to obtain a mixed oil product, and carrying out distillation cutting on the mixed oil product to obtain a cut fraction which is the Fischer-Tropsch synthesis kerosene. According to the invention, the method has the advantages that the cost is saved, the operation flexibility is high, and the process is easy to adjust; and the semi-synthetic aviation kerosene prepared from the Fischer-Tropsch synthetic kerosene has the characteristics of almost no sulfur and nitrogen impurities, low freezing point and low aromatic hydrocarbon.

Description

technical field [0001] The invention relates to the technical field of aviation fuel, in particular to a method for preparing Fischer-Tropsch synthetic kerosene by deep processing a coal indirect liquefaction product Fischer-Tropsch synthetic oil and a method for preparing semi-synthetic aviation kerosene from the Fischer-Tropsch synthetic kerosene. Background technique [0002] With the rapid development of my country's aviation industry, the demand for aviation kerosene continues to increase. Domestic aviation kerosene consumption is growing rapidly at a rate of about 130,000 tons per year, much higher than the international growth rate. From the perspective of national energy strategy and security, it is imminent to accelerate the development of aviation kerosene technology. Judging from the current development of aviation kerosene, petroleum-based aviation kerosene is still the mainstream fuel, and the development of technologies such as coal-based aviation kerosene and ...

Claims

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Application Information

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IPC IPC(8): C10G67/02
CPCC10G67/02C10G2300/1022
Inventor 段永亮安良成张安贵王慧琴张静范娜娜梁雪美白忠祥白天忠何金学郭守敬张慧佳李艳燕艺楠郑舒丹苏星宇
Owner CHINA ENERGY GRP NINGXIA COAL IND CO LTD
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