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

A high-quality, needle-shaped coke technology, applied in the field of coal chemical industry, can solve the problems of high content, high solubility, unsatisfactory quinoline, etc., and achieve high separation efficiency

Active Publication Date: 2014-01-15
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

[0006] In order to solve the problem that the process of preparing needle coke in the prior art uses light component oil to treat the needle coke raw material, which cannot meet the requirement that the content of quinoline insolubles in the raw material should be less than 0.1% when preparing high-quality needle coke, and The light component oil solvent has a higher solubility to the toluene insoluble-quinoline soluble component in the asphalt oil, and the content of the toluene insoluble-quinoline soluble component in the treated needle coke raw material is also higher, and the same The problem of being unable to meet the requirements for preparing high-quality needle coke, the present invention provides a solvent method that can effectively remove quinoline insolubles and toluene insoluble-quinoline soluble components in needle coke raw materials Needle coke process

Method used

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

Examples

Experimental program
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Effect test

Embodiment 1

[0042] The process for preparing high-quality coal-based needle coke using the solvent method described in this example includes the following steps:

[0043] (1) Preparation of solvent: pump the coal tar into the first hydrogenation reactor, set the temperature at 300°C, and the pressure at 20Mpa, add SAS-10 type dearsenic and desulfurization catalyst, carry out hydrogenation treatment on the coal tar, and put The product obtained by hydrotreating is sent to the first distillation tower for distillation, and the heavy distillate at 200°C-300°C obtained by fractional distillation is used as a solvent.

[0044] (2) Mix the coal tar with the solvent, stir evenly, remove the solvent-insoluble matter by sedimentation and separation to obtain a clear liquid, the time of sedimentation and separation in this embodiment is 24 hours, and the mass ratio of the solvent to the coal tar is 0.5 ;

[0045] (3) Pump the clarified liquid into the second hydrogenation reactor, set the temperat...

Embodiment 2

[0049] The process for preparing high-quality coal-based needle coke using the solvent method described in this example includes the following steps:

[0050] (1) Preparation of solvent: pump coal tar pitch into the first coking tower, set the temperature at 400°C and pressure at 0.1Mpa, coke the coal tar pitch, send the oil and gas produced by coking into the first distillation tower for Distillation, using the coal-based heavy distillate at 200°C-300°C obtained by fractional distillation as a solvent;

[0051] (2) Mix the coal tar pitch with the solvent, stir evenly, and then use sedimentation to separate and remove solvent-insoluble matter to obtain a clear liquid. The time for sedimentation and separation in this example is 24 hours. The mass ratio of the solvent to the coal tar pitch is is 10;

[0052] (3) Pump the clarified liquid into a fixed-bed hydrogenation reactor, set the temperature at 330°C, and set the pressure at 19Mpa, add FHRS-2 hydrogenation silicon repleni...

Embodiment 3

[0056] The process for preparing high-quality coal-based needle coke using the solvent method described in this example includes the following steps:

[0057] (1) Preparation of solvent: pump the distillate oil at 200-350°C obtained by distilling coal tar, set the temperature at 300°C, and the pressure at 20Mpa, add FHRS-2 hydrogenation and silicon-replenishing catalyst, and process the coal tar pitch Hydrotreating, the product obtained by hydrotreating is sent to the first distillation tower for distillation, and the coal-based heavy distillate at 200°C-300°C obtained by fractional distillation is used as a solvent, and the solvent also contains petroleum-based raw materials obtained by fractional distillation 200°C-300°C petroleum-based heavy distillate, the mass ratio of the coal-based heavy distillate to the petroleum-based heavy distillate is 5:95. (2) Mix the coal tar pitch with the solvent, stir evenly, and then use sedimentation to separate and remove solvent-insoluble...

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Abstract

The invention discloses a solvent process for preparation of high-quality coal-based needle coke. According to the process, raw materials and a solvent are mixed, quinoline insolubles are removed through physical separation, a clear liquor is distillated after separation, and a lightweight fraction obtained after distillation is used as a solvent; a heavy fraction obtained after distillation is subjected to hydrotreatment, then coking is carried out so as to obtain the coal-based needle coke, distillation is carried out on oil gas produced in coking, and a fractionated heavy fraction is used as a solvent. The process can prepare the high-quality coal-based needle coke with less than 0.1% of the quinoline insolubles and low content of toluene insoluble-quinoline soluble substances while the raw materials are cyclically used.

Description

technical field [0001] The invention belongs to the field of coal chemical industry, and in particular relates to a process for preparing high-quality coal-based needle coke by using a solvent method. 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. The needle coke currently 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 residues, and needle coke prepared from coal tar or coal tar pitch is called coal-based needle coke. Due to the trend of petroleum processing towards t...

Claims

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Application Information

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