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Solvent used for preparation of high-quality coal-based needle coke

A technology of needle coke and coal series, which is applied in the field of solvent for preparing coal series needle coke, and can solve the problems of poor quality of needle coke products

Active Publication Date: 2015-04-22
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

[0005] In order to solve the problem that the solubility of solvents in the prior art to toluene-insoluble-quinoline soluble matter is still high, so that the content of toluene-insoluble-quinoline soluble matter in the prepared needle coke raw material is relatively high, the prepared needle coke In order to solve the problem of poor quality of coke products, the invention provides a solvent containing heavy fractions after hydrogenation, the toluene insoluble-quinoline soluble matter in the needle coke raw material after the solvent treatment in the invention The solubility is low, and the quality of the prepared needle coke is better

Method used

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  • Solvent used for preparation of high-quality coal-based needle coke

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Experimental program
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Effect test

Embodiment 1

[0024] The coal tar is sent to a fixed-bed hydrogenation reactor for hydrogenation treatment. The temperature in the hydrogenation reactor is 330 °C and the pressure is 19 MPa. The heavy fraction between 300°C is the solvent for preparing needle coke described in this example; mix the solvent with coal tar, the mass ratio of the solvent to the coal tar is 0.5, and mix well Afterwards, the insoluble matter is removed by centrifugation to obtain the raw material for preparing needle coke.

Embodiment 2

[0026] The coal tar pitch is sent to a fixed bed hydrogenation reactor for hydrogenation treatment. The temperature in the hydrogenation reactor is 390°C and the pressure is 19Mpa. The heavy fraction between -300°C is the solvent for preparing needle coke described in this example; the solvent is mixed with coal tar pitch, and the mass ratio of the solvent to the coal tar pitch is 10 , mixed evenly, and then centrifuged to remove insoluble matter to obtain the raw material for preparing needle coke.

Embodiment 3

[0028] Send the 200-350°C distillate oil obtained from the distillation of coal tar into a fixed-bed hydrogenation reactor for hydrogenation. The temperature in the hydrogenation reactor is 390°C and the pressure is 19Mpa. The distillation tower carries out distillation, and the coal-based heavy distillate at 200°C-300°C obtained by fractional distillation is used as a solvent. In addition, the solvent also contains petroleum-based heavy distillate at 200°C-300°C obtained by fractional distillation of petroleum-based raw materials. The mass ratio of the coal-based heavy distillate to the petroleum-based heavy distillate is 5:95. The solvent and the coal tar are mixed, the mass ratio of the solvent and the coal tar is 10, the mixture is uniform, and then the insoluble matter is removed by centrifugation to obtain the raw material for preparing needle coke.

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Abstract

The invention discloses a solvent used for preparation of a high-quality coal-based needle coke. The solvent contains a coal heavy fraction which is a heavy fraction fractionated at a temperature of 200 to 300 DGE C after hydrotreatment of coal tar and coal tar pitch. According to the invention, while raw materials are cyclically used, the high-quality coal-based needle coke with low content of toluene insoluble-quinoline soluble substances is prepared.

Description

technical field [0001] The invention belongs to the field of needle coke preparation, and in particular relates to a solvent for preparing coal series needle coke. Background technique [0002] Needle coke is the main raw material for producing ultra-high-power graphite electrodes and high-power graphite electrodes. Graphite electrodes made of needle coke have strong thermal shock resistance, high mechanical strength, good oxidation performance, low motor consumption and allowable current High density and other advantages, so the market demand is huge. At present, the needle coke produced can be divided into two categories: petroleum-based needle coke and coal-based needle coke according to the different raw materials used. Among them, petroleum-based needle coke is produced from petroleum residue, while coal tar pitch and its fractions are called coal-based needle coke. Due to the trend of petroleum processing towards the direction of catalytic cracking and light-weight d...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10C1/18C10C3/08C10B55/00
Inventor 井口宪二坂脇弘二韩珏
Owner BEIJING SJ ENVIRONMENTAL PROTECTION & NEW MATERIAL CO LTD