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A method for extracting coal-based oil residue

A technology of oil and coal production, which is applied in the direction of processing tar pitch/petroleum pitch/natural pitch by distillation, and processing tar pitch/petroleum pitch/natural pitch by selective extraction, which can solve the problem of asphalt TI, high ash content, and washing oil consumption Large and other problems, to achieve the effect of low preparation ratio, high solubility, and ash content reduction

Active Publication Date: 2021-02-26
山西豪仑科化工有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The extraction and production of asphalt in oil residue often uses washing oil as the extraction agent, but after laboratory tests, it is found that when washing oil is used as the extraction agent, firstly, the amount of washing oil is large, and second, the TI and ash content in the obtained asphalt are relatively high

Method used

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  • A method for extracting coal-based oil residue

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Weigh 100 g of coal-based oil residue, mix the coal-based oil residue and the extractant at 160° C. for 1 hour according to a mass ratio of 1:2, and stir for 1 hour to obtain a mixed sample; the extraction agent has a distillation range of 180-240 ℃, density 0.9g / cm 3 , an aromatic hydrocarbon mixture containing 95% trimethylbenzene by mass fraction.

[0019] The mixed sample is separated; the clear liquid is distilled; after distillation, the still liquid is analyzed and tested.

[0020] See Table 2 for the asphalt performance indicators obtained after treating a certain oil residue with the extractant of the present invention.

[0021] Table 2 The performance index of asphalt obtained in the present invention

[0022] project TI% QI% Ash% asphalt 21.34 4.21 0.66

Embodiment 2

[0024] Weigh 100g of coal-based oil residue, mix the coal-based oil residue and the extractant at 170°C for 1 hour according to the mass ratio of 1:1.8, and stir for 1 hour to obtain a mixed sample; the extraction agent has a distillation range of 180-240 ℃, density 0.9g / cm 3 , an aromatic hydrocarbon mixture containing 80% trimethylbenzene by mass fraction.

[0025] The mixed sample is separated; the clear liquid is distilled; after distillation, the still liquid is analyzed and tested.

[0026] See Table 3 for the asphalt performance indicators obtained after treating a certain oil residue with the extractant of the present invention.

[0027] Table 3 Performance indicators of asphalt obtained in the present invention

[0028] project TI% QI% Ash% asphalt 20.95 4.17 0.67

Embodiment 3

[0030] Weigh 100g of coal-based oil residue, mix the coal-based oil residue and the extractant at 180°C for 1 hour according to a mass ratio of 1:1.5, and stir for 1 hour to obtain a mixed sample; the extractant is a distillation range of 180-240 ℃, density 0.9g / cm 3 , an aromatic hydrocarbon mixture containing 85% trimethylbenzene by mass fraction.

[0031] The mixed sample is separated; the clear liquid is distilled; after distillation, the still liquid is analyzed and tested.

[0032] See Table 4 for the asphalt performance indicators obtained after treating a certain oil residue with the extractant of the present invention.

[0033] Table 4 The performance index of asphalt obtained in the present invention

[0034] project TI% QI% Ash% asphalt 20.82 4.09 0.68

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Abstract

The invention discloses a method for extracting coal-based oil residue, which relates to the technical field of coal chemical industry; using coal-based oil residue as a raw material, adding an extractant, and combining the coal-based oil residue and the The extraction agent is mixed and placed in a melting pot for extraction. The extraction agent has a distillation range of 180-240°C and a density of 0.9g / cm 3 , containing the aromatic hydrocarbon mixture of mass fraction 80-95% trimethylbenzene; The TI content and the ash content of the asphalt extracted by the extraction agent used in the present invention and the method are obviously reduced; meanwhile, the preparation ratio of the extraction agent is low, the extraction effect is obvious, and can be It saves energy consumption and improves productivity; it can maximize the recycling and utilization of coal oil and oil residue, broaden its application direction, and has a wide range of applications in downstream industries, increasing the added value of products.

Description

technical field [0001] The invention relates to the technical field of coal chemical industry, in particular to a method for extracting oil residue from coal. Background technique [0002] my country is rich in coal and lacks oil. In recent years, with the development of the economy, imported crude oil has been increasing year by year. China's oil exploration is far from meeting the demand for rapid growth in oil. It is increasingly important to find alternative energy sources for crude oil, and coal-to-oil is one of the feasible ways. The development of coal-to-oil involves the treatment and recovery of coal-to-oil oil residue. The oil residue is mainly composed of inorganic matter and organic matter. Inorganic matter includes coal minerals, waste iron-based catalysts, and unreacted coal, etc.; organic matter includes Heavy oil and bitumen, of which bituminous substances account for about 50%. [0003] Washing oil is often used as the extraction agent in the extraction and...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10C3/08C10C3/06
CPCC10C3/06C10C3/08
Inventor 高建舟刘涛张胜军
Owner 山西豪仑科化工有限公司
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