Method for removing heteroatom from 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: 2018-02-27
NORTHWEST UNIV(CN)
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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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  • Method for removing heteroatom from coal tar
  • Method for removing heteroatom from coal tar
  • Method for removing heteroatom from coal tar

Examples

Experimental program
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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 heteroatom from coal tar. The method comprises the following steps: fully mixing coal tar with a multifunctional complexing agent A at a certain temperature, and reacting the mixture; injecting a multifunctional complexing agent B into the mixture to perform oil and water separation, wherein the multifunctional complexing agent A is prepared from 70 to 100mug/g of acid ionic denitrfying agent, 50 to 80mug/g of metal removing agent, 50 to 70mug/g of demulsifying agent, 20 to 40mug/g of synergist and 3 to 10 percent by weight of water; the multifunctional complexing agent B is prepared from 60 to 80mumg/g of asphalt fluctuating agent, 10 to 30mug/g of accelerant and 50 to 70mug/g of dispersing agent. Counted by the total weight of the coal tar,non-metal nitride and heavy asphaltene can be removed from the coal tar specially, and the removing rates are 75 percent and 21 percent respectively; moreover, metal ion iron calcium and ash can be removed effectively, the removing rate is 95 percent or more basically, and the treated coal tar can meet the requirement on 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 Applications(China)
IPC IPC(8): C10C1/20
CPCC10C1/20
Inventor 李冬苗正朋崔楼伟李稳宏
Owner NORTHWEST UNIV(CN)
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