Process for preparing high-quality coal-series needle-coke

A high-quality, needle-shaped coke technology, applied in the field of coal chemical industry, can solve the problems of unsatisfactory preparation of high-quality needle-shaped coke, high content, and unsatisfactory quinoline, and achieve the effect of reducing the content of quinoline insolubles

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 t

Method used

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  • Process for preparing high-quality coal-series needle-coke
  • Process for preparing high-quality coal-series needle-coke
  • Process for preparing high-quality coal-series needle-coke

Examples

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Embodiment 1

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

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

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

[0045] (3) Pump the clarified liquid into the second fixed-bed hydrogenation reactor, set the temperature at 330°C and th...

Embodiment 2

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

[0050] (1) Preparation of solvent: pump coal tar pitch into the first hydrogenation reactor, set the temperature at 300°C and pressure at 20Mpa, add FHRS-2 type hydrogenation silicon replenishment catalyst to hydrogenate the coal tar pitch Treatment, the product obtained by hydroprocessing is sent to the first distillation tower for distillation, and the heavy fraction at 200°C-300°C obtained by fractional distillation is used as a solvent;

[0051] (2) Coal tar is mixed with solvent, after stirring evenly, adopt sedimentation separation to remove solvent insoluble matter to obtain clarified liquid, the time of sedimentation separation in the present embodiment is 24 hours, and the mass ratio of described solvent and described coal tar pitch is 10;

[0052] (3) Pump the clarified liquid into the second hydrogenation reactor, set the temperature at ...

Embodiment 3

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

[0057] (1) Preparation of solvent: pump the distillate oil at 200-350°C obtained by distilling coal tar into the first hydrogenation reactor, set the temperature at 300°C, and the pressure at 20Mpa, add FV-20 type hydrorefining catalyst, The above-mentioned coal tar pitch is subjected to hydrogenation treatment, and the product obtained by hydrogenation treatment is sent to the first distillation tower for distillation, and the 200°C-300°C coal series heavy fraction obtained by fractional distillation is combined with the 200°C-300°C fraction obtained by fractional distillation The petroleum-based heavy distillate is used as a solvent after mixing according to the mass ratio of 5:95;

[0058] (2) Coal tar is mixed with solvent, after stirring evenly, adopt sedimentation separation to remove solvent insoluble matter to obtain clarified liquid, the ti...

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Abstract

The invention discloses a process for preparing a high-quality coal-series needle-coke. The process comprises the steps: mixing a raw material with a solvent, removing a quinoline insoluble substance by physical separation, after separation, distilling the clarified liquid, and employing a distilled light fraction as the solvent in a raw material tank; after carrying out hydrogenation treatment of a distilled heavy fraction, distilling again to obtain a raw material for preparation of the needle-coke, and carrying out delayed coking to obtain the needle-coke; and employing a heavy fraction fractionated from oil gas obtained by the secondary distillation as the solvent. While recycling the raw material, the high-quality coal-series needle-coke raw material with the quinoline insoluble substance content of less than 0.1% and lower toluene insoluble-quinoline soluble substance content can be prepared.

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 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. 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 residue, while coal-based needle coke is prepared from coal tar or coal tar pitch. Due to the trend of petroleum processing towards the direction of catalytic cracking and ligh...

Claims

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Application Information

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IPC IPC(8): C10B55/02C10B57/00
Inventor 井口宪二坂脇弘二韩珏
Owner BEIJING SJ ENVIRONMENTAL PROTECTION & NEW MATERIAL CO LTD
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