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The method of lowering the freezing point of jet fuel with high dry point

A technology with high dry point and freezing point, applied in the field of hydrocarbon oil processing, which can solve the problems of demanding content requirements, low aviation fuel yield, and large equipment investment

Active Publication Date: 2021-04-06
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The preparation of aviation fuel by the isomerization dewaxing method using noble metal catalysts has strict requirements on the content of sulfur and nitrogen in the feed; the hydrotreating and isomerization dewaxing catalysts need to be packed in two reactors separately, and the reactors need to be separated. Equipped with a stripping tower, the equipment investment is large and the operation is complicated
Although the mixed feed of heavy distillates and n-paraffins can meet the feed requirements of the isomerization section and does not need to set up a hydrotreating section, the yield of jet fuel obtained by this method is relatively low

Method used

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  • The method of lowering the freezing point of jet fuel with high dry point
  • The method of lowering the freezing point of jet fuel with high dry point

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specific Embodiment approach

[0047] According to the first preferred embodiment, the sulfur content in the feedstock oil is higher than 200ppm, the nitrogen content is higher than 10ppm, and the aromatics content is higher than 15% by weight, and the method of the present invention includes: first introducing the feedstock oil into a The first hydrogenation reaction is performed in the hydrogenation reaction zone, and then the oil obtained from the hydrogenation reaction zone is introduced into the hydrogenation reaction zone to perform the second hydrogenation reaction.

[0048] Preferably, in the above-mentioned first preferred embodiment, the method of the present invention further comprises: before introducing the oil obtained from the hydrotreating reaction zone into the hydrogenation reaction zone, The oil obtained in the reaction zone is subjected to gas stripping or separation treatment. The hydrotreated kerosene raw material should be subjected to gas-liquid separation or gas stripping to remove ...

Embodiment 1

[0069] This embodiment adopts figure 1 The process flow shown processes feedstock oils with the properties shown in Table 1.

[0070] Among them, catalysts RL-2, b1 and RLF-10 L The filling volume ratio is 1:1:0.5, the operating conditions are shown in Table 2, and the properties of the obtained aviation fuel products are shown in Table 10.

Embodiment 2

[0072] This embodiment adopts figure 1 The process flow shown processes feedstock oils with the properties shown in Table 1.

[0073] Among them, catalysts RL-2, b1 and RLF-10 L The filling volume ratio is 1:1:0.5, the operating conditions are shown in Table 3, and the properties of the obtained aviation fuel products are shown in Table 10.

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Abstract

The invention relates to the field of hydrocarbon oil processing, and discloses a method for lowering the freezing point of jet fuel with a high dry point. The method includes: introducing raw material oil into a hydrogenation reaction zone containing a freezing point depressing catalyst and a post-hydrogenation refining catalyst for the second hydrogenation reaction zone. hydrogenation reaction, and fractionate the liquid phase material obtained after the second hydrogenation reaction to obtain jet fuel products, naphtha and diesel oil; wherein, the defreezing point catalyst contains molecular sieves, substrates and hydrogenation active metal groups The molecular sieve contains at least one medium-pore molecular sieve and at least one macro-pore molecular sieve, the matrix is ​​alumina and / or silica-alumina, and the hydrogenation active metal component is selected from group VIB metals element and at least one of a Group VIII metal element. The method provided by the invention can reduce the freezing point of high-dry-point jet fuel raw materials and increase the yield of jet fuel products.

Description

technical field [0001] The invention relates to the field of hydrocarbon oil processing, in particular to a method for reducing the freezing point of jet fuel with high dry point. Background technique [0002] Jet fuel is one of the high value-added products in the oil refining industry. In recent years, with the rapid development of aviation technology and air transport industry, the demand for aviation fuel in my country has also been increasing year by year. Increasing the production of jet fuel complies with the requirements of industrial development and is also a major measure to improve the efficiency and competitiveness of oil refining enterprises. [0003] Worldwide, the process used to produce jet fuel mainly depends on the nature of the raw material. According to the different raw materials to be processed, it can be generally divided into three processes, namely straight run-refining process, hydrotreating process and hydrocracking process. [0004] The straigh...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10G65/02C10G45/00
Inventor 高杰王子文郭庆洲李洪辉王鲁强黄卫国毕云飞李洪宝
Owner CHINA PETROLEUM & CHEM CORP