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A production process of needle coke

A production process and technology of needle coke, applied in the processing of tar pitch/petroleum pitch/natural pitch, coke oven, petroleum industry, etc. Effects of low content of linoline insoluble matter and low thermal expansion coefficient

Active Publication Date: 2016-08-10
任相坤
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The technical problem to be solved by the present invention is that heat treatment is carried out under high temperature conditions in the prior art needle coke preparation process to improve the compatibility of coal-based needle coke raw materials and petroleum-based needle coke raw materials, and the temperature of heat treatment High will lead to polycondensation reaction of part of the β resin in the raw material to generate new quinoline insolubles, which will lead to thermal expansion of needle coke when using heat-treated coal-based needle coke raw materials and petroleum-based needle coke raw materials to prepare needle coke. The problem of large coefficient, and then provide a needle coke production process, the needle coke prepared by using the process of the present invention has the advantage of low thermal expansion coefficient

Method used

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  • A production process of needle coke
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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] (1) Mix 1000g of coal tar pitch and 30g of free carbon evenly, heat and react at 360°C for 5 hours to obtain modified pitch;

[0032](2) Mix the above-mentioned modified bitumen with a solvent to obtain a mixed solution, and perform centrifugal separation under a centrifugal force of 2000g to remove insoluble matter in the mixed solution, wherein the solvent is a mixture of gas light oil and absorption oil, and the The mass ratio of gas light oil to absorption oil is 19; the mass ratio of the solvent to the modified bitumen is 10;

[0033] (3) Mix the clarified liquid obtained after removing the insoluble matter and petroleum heavy oil evenly, then separate, and obtain the needle coke raw material after separating the solvent; the mass ratio of the clarified liquid to petroleum heavy oil is 3:1;

[0034] (4) Delayed coking treatment is performed on the needle coke raw material to obtain green needle coke;

[0035] (5) Prepare needle coke A by calcining the above green ...

Embodiment 2

[0039] (1) Mix 1000g of coal tar pitch and 40g of free carbon evenly, heat and react at 350°C for 6 hours to obtain modified pitch;

[0040] (2) Mix the above-mentioned modified asphalt with a solvent to obtain a mixed solution, and perform centrifugal separation under a centrifugal force of 1500g to remove insoluble matter in the mixed solution, wherein the solvent is a mixture of tar light oil and washing oil, and the The mass ratio of tar light oil and washing oil is 15; the mass ratio of the solvent and the modified pitch is 8;

[0041] (3) Mix the clarified liquid obtained after removing the insoluble matter and ethylene tar evenly, and then separate to obtain the needle coke raw material after separating the solvent; the mass ratio of the clarified liquid to ethylene tar is 4:1;

[0042] (4) Delayed coking treatment is performed on the needle coke raw material to obtain green needle coke;

[0043] (5) Prepare the needle coke B by calcining the above green needle coke. ...

Embodiment 3

[0047] (1) Mix 1000g of coal tar pitch and 50g of free carbon evenly, heat and react at 340°C for 7 hours to obtain modified pitch;

[0048] (2) Mix the above-mentioned modified bitumen with a solvent to obtain a mixed solution, and perform centrifugal separation under a centrifugal force of 1500g to remove insoluble matter in the mixed solution, wherein the solvent is tar light oil, naphtha light oil and formazan The mixture of phenol oil, the mixing mass ratio of described tar light oil and naphtha light oil can be arbitrary, the mass ratio of present embodiment preferred tar light oil and naphtha light oil is 5:5, in addition, further control tar light oil The mass ratio of the total weight of the mixture of oil and naphtha light oil to cresol oil is 10; the mass ratio of the solvent to the modified pitch is 5;

[0049] (3) Mix the clarified liquid obtained after removing the insoluble matter with the catalytic cracking residual oil evenly, then separate, and obtain the nee...

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Abstract

The invention relates to a production process of needle coke, which belongs to the technical field of needle coke preparation. The production process includes the following steps: (1) uniformly mixing coal tar pitch with free carbon or components containing free carbon, heating and reacting at 320-360°C to obtain modified pitch; (2) mixing the above modified Mix asphalt and solvent uniformly to obtain a mixed solution, and use physical separation to remove the insoluble matter in the mixed liquid; (3) Mix the clarified liquid obtained after removing the insoluble matter with the raw material of petroleum-based needle coke, and then separate , and the needle coke raw material is obtained after the solvent is separated; (4) the above needle coke raw material is subjected to delayed coking treatment to obtain needle coke; (5) the needle coke is prepared by calcining the above needle coke. The needle coke prepared by the present invention has the advantage of low coefficient of thermal expansion.

Description

technical field [0001] The invention relates to a production process of needle coke, in particular to a process for preparing needle coke by using coal-based and petroleum-based raw materials, and belongs to the technical field of needle coke preparation. Background technique [0002] Needle coke is mainly used in graphite electrodes for electric furnace steelmaking, lithium batteries, nuclear power, aerospace and other fields. According to different raw materials for producing needle coke, needle coke is divided into coal-based needle coke and petroleum-based needle coke. Among them, coal-based needle coke raw materials include coal tar, coal tar pitch, and liquid products obtained by direct hydrocracking coal, etc., and its structural characteristics are mainly condensed ring aromatics (higher aromaticity), and the total carbon element content More than 90%, the aliphatic side chains contained are short and few, and the chemical activity is poor; while the petroleum-based...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10B55/00C10C3/00
Inventor 井口宪二坂脇弘二
Owner 任相坤