Method of separating components of coal tar

A separation method and technology for coal tar, applied in the field of coal chemical industry, can solve the problems of cumbersome separation method and the like, and achieve the effects of easy availability of solvent, high reliability and simple operation.

Inactive Publication Date: 2015-08-19
CHNA ENERGY INVESTMENT CORP LTD +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Main purpose of the present invention is to provide a kind of component separation method of coal t

Method used

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  • Method of separating components of coal tar
  • Method of separating components of coal tar

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] 1) Place a small ball of dry absorbent cotton at the lower end of the separation column, and add 1cm of quartz sand, 120cm of column chromatography silica gel, and 1cm of quartz sand in sequence;

[0038] 2) Rinse the separation column with 100ml n-hexane.

[0039] 3) Adding coal tar whose total mass M is 3g. A receiving bottle 1 is placed at the lower port of the separation column for elution with n-hexane.

[0040] 4) Test with an aromatic indicator prepared by concentrated sulfuric acid (99wt%) and formaldehyde at a volume ratio of 50:1 to observe whether the end point is reached.

[0041] 5) When the aromatic hydrocarbon indicator turns red, replace the elution solvent with toluene, and replace the receiving bottle 2 at the same time.

[0042] 6) The refractive index of the receiving liquid is consistent with that of the toluene solvent, and the solvent is replaced with methanol, and the receiving bottle 3 is replaced at the same time.

[0043] 7) The refractive ...

Embodiment 2

[0056] 1) Place a small ball of dry absorbent cotton at the lower end of the separation column, and add 0.8cm high quartz sand, 140cm column chromatography silica gel, and 1.2cm quartz sand in sequence;

[0057] 2) Rinse the separation column with 100ml of n-pentane.

[0058] 3) Adding coal tar whose total mass M is 3g. The receiving bottle 1 is placed at the lower port of the separation column, and is eluted with n-pentane.

[0059] 4) Test with an aromatic indicator prepared by concentrated sulfuric acid (99wt%) and formaldehyde at a volume ratio of 50:1 to observe whether the end point is reached.

[0060] 5) When the aromatic hydrocarbon indicator turns red, replace the elution solvent with ethylbenzene, and replace the receiving bottle 2 at the same time.

[0061] 6) The refractive index of the receiving liquid is consistent with that of the toluene solvent, and the solvent is replaced with methanol, and the receiving bottle 3 is replaced at the same time.

[0062] 7) ...

Embodiment 3

[0075] 1) Place a small ball of dry absorbent cotton at the lower end of the separation column, and then add quartz sand with a height of 1.2cm, 100cm column chromatography silica gel, and 0.8cm quartz sand;

[0076] 2) Rinse the separation column with 100ml butane.

[0077] 3) Add coal tar whose total mass M is 3.24g. The receiving bottle 1 is placed at the lower port of the separation column, and is eluted with butane.

[0078] 4) Test with an aromatic indicator prepared by concentrated sulfuric acid (95wt%) and formaldehyde at a volume ratio of 51:1 to observe whether the end point is reached.

[0079] 5) When the aromatic hydrocarbon indicator turns red, replace the elution solvent with benzene, and replace the receiving bottle 2 at the same time.

[0080] 6) The refractive index of the receiving liquid is consistent with that of the toluene solvent, and the solvent is replaced with ethanol, and the receiving bottle 3 is replaced at the same time.

[0081]7) The refract...

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Abstract

The invention provides a method of separating components of coal tar. The method comprises the steps of: adding the coal tar to a separation column; sequentially eluting the separation column by using a first solvent, a second solvent, a third solvent and a fourth solvent so as to respectively obtain a saturated hydrocarbon component, an aromatic component, a light polar substance component with the average molecular weight of 302-333 and a heavy polar substance component with the average molecular weight of 425-525; the elution terminal point of the first solvent is judged by an indicator; and the elution terminal points of the second solvent, the third solvent and the fourth solvent are judged through refractive indexes; the first solvent is selected from normal hexane, pentane or butane; the second solvent is selected from methylbenzene, benzene or xylene; the third solvent is selected from methyl alcohol or ethyl alcohol; and the fourth solvent is selected from tetrahydrofuran. The method has the advantages that the different components are eluted by adopting the simple separation on the column through different elution solvents, each component can be obtained by using the aromatic hydrocarbon indicator and the refractive index for separation, and the method is simple and convenient to operate and convenient for determining the property and quantity of the coal tar components, and the solvents are easy to obtain.

Description

technical field [0001] The invention relates to the field of coal chemical industry, in particular to a method for separating components of coal tar. Background technique [0002] Coal tar, also known as coal paste, is a black or dark brown viscous liquid obtained in the process of coal coking. It cannot be produced and replaced by industry. [0003] Coal tar is also the main raw material of the coal chemical industry. It is a complex mixture of highly aromatic hydrocarbons with tens of thousands of components, mainly containing aromatics such as benzene, toluene, xylene, naphthalene, anthracene, and aromatics containing Oxygen compounds. Fractional distillation can be used to divide coal tar into fractions with different boiling point ranges. Coal tar is produced during the coking process of coal. Coal tar contains tens of thousands of components, many of which are important raw materials for the production of plastics, synthetic fibers, dyes, rubber, medicines, and hig...

Claims

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Application Information

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IPC IPC(8): C10C1/00
CPCC10C1/00C10C1/02
Inventor 李克健蔺华林章序文杨葛灵王洪学
Owner CHNA ENERGY INVESTMENT CORP LTD
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