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A method for removing heteroatoms in coal tar

A technology of coal tar and heteroatoms, which is applied in the field of removal of heteroatoms in coal tar, can solve the problems of difficult removal, high consumption of metal ions and ash impurities, and achieve good removal effect

Active Publication Date: 2020-07-10
NORTHWEST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] The present invention aims at the disadvantages of the prior art that it is difficult to remove nitrides, asphaltenes, metal ions and ash impurities in coal tar and consumes a large oil-water ratio, and provides a method for removing heteroatoms in coal tar. Its multi-functional The amount of compounding agent is less, the water consumption is reduced, the removal rate of nitrides, asphaltene, metal ions and ash impurities is high, and the oil yield is high, and the process is simple

Method used

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  • A method for removing heteroatoms in coal tar
  • A method for removing heteroatoms in coal tar
  • A method for removing heteroatoms in coal tar

Examples

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Effect test

Embodiment 1

[0058] In this embodiment, according to the operation steps of the above-mentioned method, calculated with the total weight of 150g coal tar, the multifunctional composite agent used has the following component distribution ratio:

[0059] Multifunctional Compound A 1 Including: acidic ion denitrification agent 85 μg / g, demetallization agent 70 μg / g, demulsifier 60 μg / g, synergist 30 μg / g, water 5wt%, mixed and prepared;

[0060] Multifunctional Compound B 1 It consists of: 70 μg / g asphalt flocculant, 20 μg / g accelerator and 60 μg / g dispersant, and is prepared by mixing.

[0061] Wherein: the acidic ion denitrification agent is 1-methyl-3-methylimidazole dimethyl sulfate; the metal removal agent is composed of 80wt% acetic acid and 20wt% polyaspartic acid; the demulsifier is 60wt% polyoxyethylene poly It is prepared by mixing oxypropylene polyether with 40wt% polyoxyethylene; the synergist is sulfate ester salt; the flocculation agent is polyacrylamide; the accelerator is po...

Embodiment 2

[0083] In this embodiment, according to the operation steps of Example 1, calculated with the total weight of 150g of coal tar, the multifunctional composite agent used has the following component distribution ratio:

[0084] Multifunctional Compound A 2 : 70 μg / g of acidic ion denitrification agent, 55 μg / g of metal removal agent, 50 μg / g of demulsifier, 20 μg / g of synergist, 3wt% of water, mixed and prepared;

[0085] Multifunctional Compound B 2 : 60 μg / g asphalt flocculation agent, 15 μg / g accelerator, and 50 μg / g dispersant, prepared by mixing, calculated on the basis of the total weight of 150 g of coal tar.

[0086] Wherein: the acidic ion denitrification agent is 1-ethyl-3-methylimidazole dihydrogen sulfate; the metal removal agent is composed of 80wt% acetic acid and 20wt% polyaspartic acid; the demulsifier is 60wt% polyoxyethylene poly It is prepared by mixing oxypropylene polyether with 40wt% polyoxyethylene; the synergist is sulfate ester salt; the asphalt floccu...

Embodiment 3

[0090] In this embodiment, according to the operation steps of Example 1, calculated with the total weight of 150g of coal tar, the multifunctional composite agent used has the following component distribution ratio:

[0091] Multifunctional Compound A 3 : Acidic ion denitrification agent 90 μg / g, metal removal agent 75 μg / g, demulsifier 65 μg / g, synergist 35 μg / g, water 8wt%, mixed and prepared;

[0092] Multifunctional Compound B 3 : 75 μg / g asphalt flocculation agent, 30 μg / g accelerator, and 65 μg / g dispersant, prepared by mixing, calculated on the basis of the total weight of 150 g of coal tar.

[0093] Wherein: the acidic ion denitrification agent is 1-methyl-3-methylimidazole dimethyl sulfate; the demetallization agent is composed of 80wt% metaphosphoric acid and 20wt% polyaspartic acid; the demulsifier is 60wt% alkylphenol aldehyde The resin and 40wt% polyoxyethylene are mixed; the synergist is sulfate ester salt; the asphalt flocculation agent is polyacrylamide; the...

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Abstract

The invention relates to a method for removing heteroatoms in coal tar. The method is to fully mix coal tar and multifunctional composite agent A at a certain temperature to react, and then inject the mixed material into multifunctional composite agent B. Oil-water separation, wherein the multifunctional composite agent A consists of 70-100 μg / g of acidic ion denitrification agent, 50-80 μg / g of demetallizing agent, 50-70 μg / g of demulsifier, 20-40 μg / g of synergist, and water. Composed of 3 to 10 wt%; the multifunctional composite agent B is composed of 60 to 80 μg / g of asphalt flocculating agent, 10 to 30 μg / g of accelerator, and 50 to 70 μg / g of dispersant. Calculated based on the total weight of coal tar, the present invention It can specifically remove non-metallic nitrogen compounds and heavy asphaltenes in coal tar, with removal rates of 75% and 21% respectively. It can also effectively remove metal ions, iron, calcium and ash, with removal rates of basically 95%. Above, the processed coal tar can meet the requirements of subsequent deep processing.

Description

technical field [0001] The invention belongs to the technical field of coal tar pretreatment, and in particular relates to a method for removing heteroatoms in coal tar. Background technique [0002] my country lacks oil, gas, and is relatively rich in coal. Coal is the most important energy source in my country, accounting for 70% of China's total primary energy consumption, and is crucial to the development of my country's industry. In recent years, China has been developing new energy sources, but the pattern of using coal as the main energy source is still difficult to change in the short term. Coal tar is a major by-product of coal dry distillation or pyrolysis, and its output is about 20 million t / a. Since coal tar is a complex mixture with many components, direct use will cause waste of resources and environmental pollution. The current shortage of international crude oil supply has promoted the research of coal tar hydrogenation technology. Coal tar hydrogenation c...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10C1/20
CPCC10C1/20
Inventor 李冬苗正朋崔楼伟李稳宏
Owner NORTHWEST UNIV
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