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Process for producing needle coke from compounded and blended components such as washing oil, anthracene oil and asphalt in medium and low temperature coal tar as raw materials

A technology of low-temperature coal tar and needle coke, which is applied in tar processing through selective solvent extraction, petroleum industry, coking carbonaceous materials, etc. Deal with the burden and difficulty, etc., to achieve the effect of simple and efficient raw material processing, excellent product performance, and simplified production process

Inactive Publication Date: 2018-04-03
SHAANXI YULIN ENERGY GRP CO LTD +1
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  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

[0004] The above raw material pretreatment process has a certain effect on the removal of QI and component adjustment, but there are also some shortcomings: (1) The fraction optimization and component optimization of the raw material for the preparation of asphalt from needle coke have not been optimized, and the yield of needle coke is low. Preprocessing burden and difficulty
(2) The composition of raw materials is single, and the chemical requirements for the growth of carbonaceous mesophase microspheres cannot be completed during the thermal polymerization process, and the quality of semi-coke is poor; (3) The quality control methods of single oil-based or coal-based needle coke products are limited and cannot meet the requirements Preparation of materials suitable for ultra-high power electrodes

Method used

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  • Process for producing needle coke from compounded and blended components such as washing oil, anthracene oil and asphalt in medium and low temperature coal tar as raw materials
  • Process for producing needle coke from compounded and blended components such as washing oil, anthracene oil and asphalt in medium and low temperature coal tar as raw materials
  • Process for producing needle coke from compounded and blended components such as washing oil, anthracene oil and asphalt in medium and low temperature coal tar as raw materials

Examples

Experimental program
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Effect test

Embodiment 1

[0024] In this example, the process of producing needle coke with medium-low temperature coal tar medium wash oil, anthracene oil and asphalt components compounded as raw materials is specifically realized by the following steps:

[0025] 1000g of medium and low temperature coal tar is prepared with 1200g of toluene and 800g of n-heptane as a solvent extractant, and the coal tar is extracted for 6 hours at 75°C. The mixture is separated by distillation, and the solid insolubles are removed by physical separation. Cut 982g of refined medium-low temperature coal tar into vacuum fractions to obtain wash oil, anthracene oil and asphalt components of 148g, 196g, and 392g respectively, and prepare raw materials with mass m wash oil:m anthracene oil:m asphalt=1:1.5:6.5 , 542g of needle coke raw materials were blended with 60g of washing oil, 90g of anthracene oil, and 392g of pitch. The QI content of the pitch product was 0.096wt%, and the content of 3-4 ring aromatic hydrocarbons acc...

Embodiment 2

[0027] 1000g of medium and low temperature coal tar is prepared with 1090g of furfural and 910g of n-hexane as a solvent extractant, and the coal tar is extracted at 60°C for 8 hours. The mixture is separated by distillation, and the solid insolubles are removed by physical separation. Cut 975g of refined medium-low temperature coal tar into vacuum fractions to obtain 142g, 208g and 405g of wash oil fractions at 230-300°C, anthracene oil fractions at 300-350°C and asphalt fractions at 350-450°C respectively. Oil: m anthracene oil: m asphalt=1:1:5.5 Ratio adjustment of raw materials, respectively with washing oil 74g, anthracene oil 74g, asphalt 405g allocation needle coke raw material 553g, make the pitch product QI content be 0.092wt%, 3~ The content of 4-ring aromatic hydrocarbons accounts for 68.3wt%. Put the blended raw materials in a 1L high-temperature and high-pressure reactor, vent the system, replace with nitrogen, raise the temperature to 400°C at a heating rate of 0...

Embodiment 3

[0029] Use 1929g of N-methylpyrrolidone and 1071g of cyclohexane as a solvent extractant for 1000g of medium-low temperature coal tar, extract the coal tar for 6 hours at 80°C, separate the extractant from the mixture by distillation, and remove the solid insolubles by physical separation. Cut 986g of refined medium-low temperature coal tar into vacuum fractions to obtain 132g, 215g and 418g of wash oil fractions at 230-300°C, anthracene oil fractions at 300-350°C, and asphalt fractions at 350-450°C, respectively. Oil: m anthracene oil: m pitch = 1: 1.5: 7.5 The ratio of the needle coke raw material deployment, respectively with 56g of washing oil, 84g of anthracene oil, pitch 418g deployment of needle coke raw material 558g, so that the QI content of the pitch product is 0.098wt% , the content of 3-4 ring aromatic hydrocarbons accounted for 70.2wt%. Put the blended raw materials in a 1L high-temperature and high-pressure reactor, vent the system, replace with nitrogen, raise ...

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Abstract

The invention provides a process for producing needle coke from compounded and blended components such as washing oil, anthracene oil and asphalt in medium and low temperature coal tar as raw materials. The process comprises the steps as follows: raw material pretreatment of the medium and low temperature coal tar, fraction cutting of the components such as the washing oil, the anthracene oil andthe asphalt in the medium and low temperature coal tar, blending of the compounding raw materials, and preparation of the needle coke with thermal polymerization and calcination processes. The ideal raw materials for the needle coke are prepared from fractions of the coal tar by compounding and blending, formation of a wide-area ordered fibrous structure from an intermediate phase can be greatly promoted in a thermal polymerization process by means of reasonable raw material components, and a needle coke product with excellent performance is obtained after calcination.

Description

technical field [0001] The invention belongs to the technical field of needle coke production, and in particular relates to a process for producing needle coke by compounding raw materials of medium-low temperature coal tar washing oil, anthracene oil and asphalt components. Background technique [0002] Needle coke is a new type of carbon material. It is a silver-gray, porous solid material with metallic luster. The surface is obviously slender and needle-shaped or fiber-like textured. . It has excellent properties such as low thermal expansion coefficient, less impurity content, good graphitization performance, good electrical conductivity, high heat resistance strength and mechanical strength, and excellent oxidation resistance. It is widely used in national defense and metallurgical industries. Raw materials for high-end carbon products such as lithium battery anode materials, special carbon materials, carbon fibers and their composite materials. Compared with ordinary...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10B55/00C10C1/18
CPCC10B55/00C10C1/18
Inventor 任军哲黄晔李冬崔楼伟郑金欣王莉莎高峰李稳宏
Owner SHAANXI YULIN ENERGY GRP CO LTD
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