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Method for extraction and separation of carbon-containing coal residues based on ionic liquid

An ionic liquid and residue technology, which is applied in the processing of tar pitch/petroleum pitch/natural pitch, tar pitch/petroleum pitch/natural pitch, and petroleum industry by selective extraction, achieving low production cost, simple process equipment, and high extraction efficiency. The effect of improved separation selectivity

Inactive Publication Date: 2013-04-24
INST OF PROCESS ENG CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there are almost no literature reports on the use of pure ionic liquids as extractants to separate asphaltenes from coal carbonaceous residues and further prepare mesophases.

Method used

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  • Method for extraction and separation of carbon-containing coal residues based on ionic liquid
  • Method for extraction and separation of carbon-containing coal residues based on ionic liquid
  • Method for extraction and separation of carbon-containing coal residues based on ionic liquid

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Weigh about 1.0217g coal direct liquefaction residue and add it into a beaker containing 10.0166g [TEtA][Of] ionic liquid. After heating, when the temperature is stable at 30°C, place the beaker containing the mixed solution on a magnetic heating stirrer and stir continuously for about 15 minutes, then stop heating and stirring, and filter out the insoluble matter with a solution filter. In the mixed solution obtained by suction filtration, add about 10 times the deionized water of the volume of the ionic liquid, and obviously there is solid precipitation and layering, and then filter with a solution filter to obtain a solid phase substance, and obtain 0.1079g of a solid product after drying, that is It is a mixture of asphaltenes, the yield is about 10.60%, the H / C is about 0.81, and the S content is about 0.20%. It can be used as a raw material for preparing mesophase pitch.

Embodiment 2

[0021] Weigh about 1.0029g coal tar distillation residue and add it into a beaker containing 8.0097g [TEtA][OP] ionic liquid. After heating, when the temperature stabilizes at 40°C, place the beaker containing the mixed solution on a magnetic heating stirrer and stir continuously for about 30 minutes, then stop heating and stirring, and filter out the insoluble matter with a solution filter. Add deionized water about 12 times the volume of the ionic liquid to the mixed solution obtained by suction filtration, obviously there is solid precipitation and layering, and the solid phase substance is obtained by filtering with a solution filter again, and 0.5793g of a solid product is obtained after drying, namely It is a mixture of asphaltenes, the yield is about 57.76%, the H / C is about 0.96, and the S content is about 0.288%. It can be used as a raw material for preparing mesophase pitch.

Embodiment 3

[0023] Weigh about 1.0061g coal direct liquefaction residue and add it into a beaker filled with 10.0575g [MPy][OAc] ionic liquid. After heating, when the temperature stabilizes at 30°C, place the beaker containing the mixed solution on a magnetic heating stirrer and stir continuously for about 30 minutes, then stop heating and stirring, and filter out the insoluble matter with a solution filter. In the mixed solution obtained by suction filtration, add about 10 times the deionized water of the volume of the ionic liquid, obviously there is solid precipitation and layering, and the solid phase substance is obtained by filtering with a solution filter again, and 0.3087g solid product is obtained after drying, that is It is a mixture of asphaltenes, the yield is about 30.68%, the H / C is about 0.76, and the S content is about 0.10%. It can be used as a raw material for preparing mesophase pitch.

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Abstract

The invention provides a technology for separating asphaltene materials from carbon-containing solid residues generated in a coal processing process based on an ionic liquid extracting agent. The technology employs pyridine and ammonium ionic liquid as the extracting agent to separate the asphaltene materials from carbon-containing residues through two steps of extraction and reverse extraction at a certain temperature and pressure, and provides high-quality raw materials for modifying and preparing mesophase asphalt and further producing high performance carbon materials. The ionic liquid used by the method is easy to synthesize, is cheap, has low viscosity and is easy to regenerate. Compared with a convention extraction separation method by using an organic solvent, the method can obviously increase separation selectivity of the asphaltene materials in the residues, has relatively low H / C ratio and sulfur content of the extract, and almost contains no soluble substances such as quinoline. The technology has the advantages of environment protection, energy conservation, simple equipment, convenient operations, low investment, simplified production process, easily realizable automatic control, etc.

Description

Technical field: [0001] The invention relates to a method for separating asphaltenes from carbon-containing solid residues produced in a coal processing process by using an ionic liquid as an extraction agent. Background technique: [0002] China's energy resources are characterized by abundant coal resources and relative scarcity of oil and natural gas. This characteristic determines that my country's energy structure is dominated by coal, and the pattern of coal as the main energy source in my country is difficult to change for a long time. Vigorously developing the coal chemical industry is the trend of my country's energy development, involving coal coking, gasification, indirect liquefaction, direct liquefaction and coal chemical products and other fields. How to make full use of coal resources efficiently and cleanly, reduce the shortage of oil supply, and realize the coordinated development of energy, economy, and environment is an urgent and strategic task for our co...

Claims

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Application Information

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IPC IPC(8): C10C3/08C10C3/00
Inventor 张香平白璐聂毅董海峰李益张锁江
Owner INST OF PROCESS ENG CHINESE ACAD OF SCI
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