Coal tar pitch for preparing needle coke, method for preparing same and solvent used in preparation process of coal tar pitch

A technology for coal tar pitch and coal tar, which is applied in the field of coal tar or coal tar pitch and its preparation, and can solve the problems of difficulty in preparing needle coke with high yield and the like

Active Publication Date: 2012-09-19
BEIJING SJ ENVIRONMENTAL PROTECTION & NEW MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In order to solve the problem that the coal tar pitch obtained after the purification treatment by the solvent method in the prior art, while removing the quinoline insoluble matter, the toluene insoluble pyridine soluble matter is also excessively removed, which makes it difficult to prepare high-yield n

Method used

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  • Coal tar pitch for preparing needle coke, method for preparing same and solvent used in preparation process of coal tar pitch
  • Coal tar pitch for preparing needle coke, method for preparing same and solvent used in preparation process of coal tar pitch

Examples

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Effect test

Embodiment 1

[0040] The preparation method of coal tar pitch described in the present embodiment is:

[0041] (1) Using 100 parts by weight of coal tar as a raw material, the coal tar contains the following components in mass percentages: QI 2.4%, PI 2.8%, TI 5.1%, β in the coal tar pitch 1 The mass percentage of the component is 0.4%, β 2 The mass percent of component is 2.3%;

[0042] Mix the coal tar pitch with 500 parts by weight of solvent, stir evenly, and centrifuge to separate solvent-insoluble matter; the solvent is a mixture of coal-based light oil and coal-based aromatic oil, wherein the coal-based light The oil is gas light oil, the coal series aromatic hydrocarbon oil is coker oil, and the mass ratio of coker oil to gas light oil is 10; the mass ratio of the solvent to the coal tar pitch raw material is 5.

[0043] (2) Under normal pressure, distill the residue after separating the solvent-insoluble matter in step (1) at 350°C, separate the solvent and the fraction between 0...

Embodiment 2

[0052] The preparation method of coal tar pitch described in the present embodiment is:

[0053] (1) Using 100 parts by weight of ordinary coal tar pitch as a raw material, the coal tar pitch contains the following components in mass percentages: QI 5.0%, PI 5.8%, TI 10.6%, and the coal tar pitch contains β 1 The mass percentage of the component is 0.8%, β 2 The mass percent of the component is 4.8%.

[0054] The coal tar pitch is mixed with 50 parts by weight of solvent, and after stirring evenly, the solvent insoluble matter is separated to obtain the coal tar pitch used for preparing needle coke; the solvent is coal-based light oil and coal-based aromatic oil. A mixture of hydrocarbon oils, wherein the coal-based light oil is tar light oil, the coal-based aromatic hydrocarbon oil is anthracene oil, and the mass ratio of the anthracene oil to tar light oil is 0.1; the solvent and the coal The mass ratio of the tar pitch raw material is 0.5.

[0055] The method for separat...

Embodiment 3

[0065] The preparation method of coal tar pitch described in the present embodiment is:

[0066] (1) Using 100 parts by weight of ordinary coal tar pitch as a raw material, the coal tar pitch contains the following components in mass percentages: QI 5.0%, PI 5.8%, TI 10.6%, and the coal tar pitch contains β 1 The mass percentage of the component is 0.8%, β 2 The mass percentage of component is 4.8%;

[0067] Mix the coal tar pitch with 120 parts by weight of solvent, stir evenly, and centrifuge to separate the solvent-insoluble matter; the solvent is a mixture of coal-based light oil and coal-based aromatic oil, wherein the coal-based light The oil is gas light oil, the coal series aromatic hydrocarbon oil is coker oil, and the mass ratio of the coker oil to the gas light oil is 9; the mass ratio of the solvent to the coal tar pitch raw material is 1.2.

[0068] (2) Under normal pressure, distill the residue after separating the solvent-insoluble matter in step (1) at 370° ...

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Abstract

The invention provides coal tar pitch for preparing needle coke. The coal tar pitch comprises the following components in part by weight: 90 to 96 percent of toluene soluble matter, less than or equal to 0.05 percent, but not zero percent of quinoline insoluble matter, less than or equal to 0. 5 percent, but not zero percent of pyridine-insoluble quinoline soluble matter and 3.5 to 9.5 percent of toluene-insoluble pyridine soluble matter. In the method, the toluene-insoluble pyridine soluble matters account for 4.5 to 6.7 percent of the mass of all raw materials. On the premise of not affecting the quality of needle tar, by using the coal tar pitch, the yield of needle tar is obviously raised and the coefficient of thermal expansion of needle tar is lowered.

Description

technical field [0001] The invention belongs to the field of coal chemical industry, and in particular relates to coal tar or coal tar pitch used for preparing needle coke and a preparation method thereof. Background technique [0002] Needle coke belongs to carbon material, which has a metallic luster and is silver-gray; from the perspective of its structure, it has an obvious flow texture, and the particle length-to-width ratio is large. Because needle coke is a high-quality material for manufacturing high-power and ultra-high-power electrodes, graphite electrodes made of needle coke have strong thermal shock resistance, high mechanical strength, good oxidation performance, low electrode consumption and large allowable current density and other advantages, so the market demand is huge, and it is widely used in super-electric electrodes. The needle coke currently produced can be divided into two categories: petroleum-based needle coke and coal-based needle coke according t...

Claims

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Application Information

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IPC IPC(8): C10C3/08C10C3/06C10C3/00
Inventor 井口宪二坂脇弘二
Owner BEIJING SJ ENVIRONMENTAL PROTECTION & NEW MATERIAL CO LTD
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