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Method for deep processing coal tar

A coal tar and hydrogenation device technology, applied in tar processing, petroleum industry, etc., can solve the problems of low efficiency, failure to realize the hydrogenation of the whole fraction of coal tar, and the inability to deeply process coal tar, etc., to extend the operation cycle, The effect of expanding the processing range

Inactive Publication Date: 2007-02-21
WISON ENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, none of the above-mentioned methods can realize the full fraction hydrogenation of coal tar, which will bring some disadvantages, such as inability to treat coal tar in depth, low efficiency, etc.

Method used

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  • Method for deep processing coal tar

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1～6

[0062] In Examples 1-6, the same coal tar raw material was used to treat coal tar under different operating conditions, and the properties of the raw materials used are shown in Table 1.

[0063] coal tar

Elemental analysis (mol%)

C

83.10

H

6.75

O

9.09

S

0.177

N

0.8754

Metal elements (μg / g)

Ca

31.33

Ni

1.16

V

0.09

Fe

34.70

Toluene insoluble matter, %

0.55

Asphaltenes, %

17.1

Charcoal residue, %

8.40

Precipitate,%

0.14

Density at 20°C, g / cm 3

1.0615

Distillation range:

％

water

3.77

＜180℃

3.54

180～240℃

9.89

240～300℃

11.95

300～360℃

13.87

360～380℃

3.45

[0064] The specific operation process is as follows:

[0065] The coal tar raw material 1 enters the...

Embodiment 7～10

[0069] In Examples 7-10, different coal tar raw materials were used to treat coal tar under the same operating conditions, and the properties of the raw materials used are shown in Table 3.

[0070] Example

[0071] The specific operation process is as described in Example 1, and the reaction conditions are shown in Table 4. Reactor catalysts include main catalysts and protective agents. The protective agent is filled in the upper part of the hydrogenation unit, and the content of molybdenum oxide in the protective agent is 7.0%, and the content of nickel oxide is 1.5%. The pore volume of described protecting agent is 0.55ml / g, and specific surface is 180m 2 / g. The loading amount of the protective agent is 10%, based on the total loading amount of the main catalyst and the protective agent. The main catalyst is packed in the lower part of the hydrogenation unit. In the main catalyst, the content of tungsten oxide is 21%, the content of molybdenum oxide is 8%, th...

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Abstract

This invention provides a method for hydrogenating coal tar. The method comprises: (1) filtering coal tar to remove solid particles with sizes larger than 25 mum; (2) dehydrating to prevent water from damaging the hydrogenation catalyst; (3) dedusting to remove solid particles with sizes smaller than 25 mum; (4) catalytically hydrogenating in a hydrogenation device to obtain gas-phase and liquid-phase products; (5) sending the liquid-phase products into a fractionation column, and fractionating to obtain gasoline, diesel oil and trail oil fractions. The method can realize all fractions hydrogenation of coal tar.

Description

technical field [0001] The invention relates to a method for deep processing coal tar by adopting hydrogenation technology. Background technique [0002] At present, the coke required by domestic steelmaking enterprises all comes from coal, and high-temperature coal tar will be produced as a by-product during the coking process of coal; in addition, medium and low-temperature coal tar will also be produced as a by-product during the city gas manufacturing process. Of course, local coking methods in various places Coal tar is also produced in the process. In short, with the development of China's economy and the expansion of the utilization of coal resources, the output of coal tar in my country will increase. How to effectively utilize coal tar is an important link in the comprehensive utilization of coal. The usual method in China is to fractionate light fractions and then use chemical methods to produce chemical products such as benzene and phenol. This method is difficu...

Claims

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Application Information

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IPC IPC(8): C10C1/00
Inventor 陈兆然王更新詹迎春张京立
Owner WISON ENG
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