A combined process method for producing high-end graphite materials

A graphite material and high-end technology, which is applied in the combined process field of producing high-end graphite materials, can solve the problems of high thermal expansion system, unstable needle coke streamlined texture, etc., and achieve stable product quality, feed amount and feed properties, The effect of temperature range change

Active Publication Date: 2021-11-05
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The needle coke prepared by the above method has shortcomings such as unstable streamlined texture and high thermal expansion system, and the comprehensive performance of needle coke needs to be further improved

Method used

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  • A combined process method for producing high-end graphite materials

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Catalytic oil slurry from a refinery was used as raw material, and the specific properties of the oil slurry are shown in Table 1. The temperature of the 10% distillation point of the light distillate on the 2nd column of the vacuum distillation unit is 300°C, the temperature of the 90% distillation point is 350°C, the temperature of the 10% distillation point of the middle distillate is 360°C, and the temperature of the 90% distillation point is 470°C ℃, the temperature of the 10% distillation point of heavy distillate oil at the bottom of the tower is 480 °C, part of the middle distillate oil enters the hydrotreating unit 5, and the catalyst bed of the hydrotreating unit is filled as follows: There are four reactors in the unit, respectively filled with protective agent, Demetallization agent, desulfurization agent and denitrification agent, the loading volume ratio is 5:40:30:25, and the hydrotreating process conditions are shown in Table 2; the hydrogenation material...

Embodiment 2

[0033] Using the same catalytic oil slurry as in Example 1 as raw material, the 10% distillation point temperature of the light distillate on the vacuum distillation unit 2 tower is 340°C, the 90% distillation point temperature is 380°C, and the middle distillate 10% distillation point temperature is 340°C. The temperature is 380°C, the 90% distillation point is 500°C, the temperature of the 10% distillation point of the heavy distillate at the bottom of the tower is 510°C, part of the middle distillate enters the hydrotreating unit 5, and the catalyst bed of the hydrotreating unit is filled as follows: The device has a total of four reactors, which are filled with protective agent, demetallizer, desulfurizer and denitrification agent respectively. The filling volume ratio is 5:40:30:25. The hydrogen treatment process conditions are shown in Table 2; The hydrogenation material 6 is mixed with the middle distillate 4 that does not enter the hydrogenation unit, and then heated by...

Embodiment 3

[0035] Using the same catalytic oil slurry as in Example 1 as raw material, the temperature of the 10% distillation point of the light distillate on the 2nd tower of the vacuum distillation unit is 330°C, the temperature of the 90% distillation point is 350°C, and the temperature of the 10% distillation point of the middle distillate is 330°C. The temperature is 370°C, the 90% distillation point is 480°C, the temperature of the 10% distillation point of the heavy distillate at the bottom of the tower is 500°C, part of the middle distillate oil enters the hydrotreating unit 5, and the catalyst bed of the hydrotreating unit is filled as follows: The device has a total of four reactors, which are respectively filled with protective agent, demetallizer, desulfurizer and denitrification agent, and the filling volume ratio is 5:40:30:25. The process conditions of hydroprocessing are shown in Table 2; The hydrogenation material 6 is mixed with the middle distillate 4 that does not ent...

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Abstract

The invention discloses a combined process method for producing high-end graphite materials. Light distillate oil, middle distillate oil and heavy distillate oil are fractionated from raw oil through a raw material oil fractionation tower, and the middle distillate oil enters a hydrotreating device for hydrogenation treatment. The obtained liquid phase product is used as the material for forming the mesophase to be heated by the heating furnace a and then enters the coke tower. The coking gas generated by the coke tower passes through the coking fractionation tower to obtain coker wax oil, which is the light distillate separated from the coke gas oil and the raw oil fractionation tower Mixed as the coke pulling material, it is heated by the heating furnace b and then enters the coke tower, and the coke tower completes the mesophase formation stage and the coke pulling stage in turn to obtain high-end graphite materials. The high-end graphite material produced continuously by the method has the advantages of stable streamlined texture, low thermal expansion coefficient, etc., and is suitable for producing ultra-high power graphite electrodes.

Description

technical field [0001] The invention relates to a combined process method for producing high-end graphite materials, in particular to a combined process method for continuously producing high-end needle coke. Background technique [0002] Needle coke is mainly used to produce high-power and ultra-high-power graphite electrodes. With the development of the steel age, the output of steel scrap has gradually increased, which has promoted the development of electric furnace steel, and will inevitably increase the amount of graphite electrodes, especially high-power and ultra-high-power electrodes, and the demand for needle coke will also continue to increase. [0003] CN200810017110.3 discloses a method for preparing needle coke. The fraction or residual oil rich in aromatics is subjected to a delayed coking treatment with a certain temperature rise program, and then the obtained green coke is calcined to obtain a needle-shaped coke with a high mesophase content. Needle coke wi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10G69/00C10G9/00C01B32/205C10B55/00
CPCC10B55/00C10G9/005C10G69/00C01B32/205
Inventor 赵日峰初人庆郭丹方向晨乔凯
Owner CHINA PETROLEUM & CHEM CORP
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