Method for producing aviation kerosene by using cyclic hydrocarbon-rich fraction of coal tar

A technology for aviation kerosene and cyclic hydrocarbons, which is applied in the field of coal tar hydrogenation and can solve the problems of harsh reaction conditions and low yield.

Active Publication Date: 2021-09-10
NORTHWEST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] At present, the methods of coal-based raw materials being jet fuel

Method used

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  • Method for producing aviation kerosene by using cyclic hydrocarbon-rich fraction of coal tar
  • Method for producing aviation kerosene by using cyclic hydrocarbon-rich fraction of coal tar
  • Method for producing aviation kerosene by using cyclic hydrocarbon-rich fraction of coal tar

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Embodiment 1

[0043] The medium and low temperature coal tar provided by the present embodiment is the method for producing aviation kerosene as a raw material, which comprises the following steps:

[0044] 1) Using medium and low temperature coal tar as raw material, cut out the fraction at 180-350°C through atmospheric and vacuum distillation to obtain the primary fraction rich in cyclic hydrocarbons;

[0045] 2) Under the condition that the solvent-oil volume ratio is 3:1, the extraction temperature is 55°C, and the extraction time is 30 minutes, low-molecular-weight alkanes (agents) are used to carry out liquid-liquid extraction and separation of the primary fraction (oil) rich in cyclic hydrocarbons. Rich saturated distillate and cyclic hydrocarbon-rich secondary distillate;

[0046] In this embodiment, the low molecular weight alkane is C 6 n-alkanes;

[0047] 3) The obtained rich saturated fraction can be used for the adjustment of aviation kerosene; for the secondary fraction rich...

Embodiment 2

[0061] The preparation method is the same as that of Example 1, but the reaction parameters of each step are different, see Table 1 for details.

[0062] Reaction parameter table in each step of table 1 embodiment 2~6

[0063]

[0064] The aviation kerosene content obtained in this embodiment is 85wt%, and the content of gasoline is 15wt%.

Embodiment 3

[0066] The preparation method is the same as that of Example 1, but the reaction parameters of each step are different, see Table 1 for details.

[0067] The aviation kerosene content that present embodiment obtains is 80wt%, and the content of gasoline is 20wt%.

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Abstract

The invention belongs to the technical field of coal tar hydrogenation, and relates to a method for producing aviation kerosene by using a cyclic hydrocarbon-rich fraction of coal tar. The method comprises the following steps: with medium-and-low-temperature coal tar as a raw material, conducting atmospheric and vacuum distillation treatment to cut a cyclic hydrocarbon-rich primary fraction of the coal tar; extracting and separating out rich saturated fractions and a cyclic hydrocarbon-rich secondary fraction by adopting low-molecular alkane; carrying out aromatic hydrocarbon extraction and separation on the cyclic hydrocarbon-rich secondary fraction to obtain an aromatic hydrocarbon-rich fraction and a cycloalkane-rich fraction; and hydrofining the aromatic hydrocarbon-rich fraction, adding the hydrofined aromatic hydrocarbon-rich fraction into the cycloalkane-rich fraction, and carrying out hydrofining reaction, hydrocracking and isomerization reaction successively to obtain an aviation kerosene product. By adopting a low-molecular alkane extraction/aromatic hydrocarbon extraction/hydro-upgrading three-stage coupled process, the coal tar can be converted into aviation fuel to the maximum extent; and operation conditions are mild, product quality is good, operation is stable, and large-scale production is realized.

Description

technical field [0001] The invention belongs to the technical field of coal tar hydrogenation, and relates to a method for producing aviation kerosene by using coal tar-rich cyclic hydrocarbon fractions. Background technique [0002] Petroleum-based jet fuel is the main source of power in the aerospace field. Although its density and heat absorption have reached the limit, it is difficult to meet the requirements of future supersonic aircraft. Due to the high temperature generated by the engine during operation, it is not enough to rely solely on atmospheric cooling, while coal-based jet fuel can rely on its own large heat capacity, which can take away most of the heat before combustion to reduce the engine temperature; at the same time Coal-based fuels can withstand high temperatures of 500°C without carbon formation, while traditional petroleum-based jet fuels cannot withstand temperatures above 450°C. Therefore, coal-based jet fuels will be an inevitable trend in the deve...

Claims

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Application Information

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IPC IPC(8): C10G67/00
CPCC10G67/00Y02P30/20
Inventor 朱永红李冬刘介平郭青刘杰田丰杜崇鹏刘姣姣周秋成
Owner NORTHWEST UNIV
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