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Combined process for producing high-end graphite material

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 unstable needle coke streamlined texture and high thermal expansion system, and achieve narrow temperature range, stable feed amount, and variable temperature range. Effect

Active Publication Date: 2020-11-06
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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  • Combined process for producing high-end graphite material

Examples

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 oil on the 2nd tower of the vacuum deep drawing device is 300°C, the temperature of the 90% distillation point is 350°C, the temperature of the 10% distillation point of the middle distillate oil is 360°C, and the temperature of the 90% distillation point is 470°C, the temperature of 10% distillation point of the heavy distillate at the bottom of the tower is 480°C, part of the middle distillate enters the hydrotreating unit 5, and the catalyst bed of the hydrotreating unit is filled as follows: There are four reactors in the unit, each of which is filled with a 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 liquid phase stre...

Embodiment 2

[0033] 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 deep drawing device is 340°C, the temperature of the 90% distillation point is 380°C, and 10% of the middle distillate is distilled The point temperature is 380°C, the 90% distillation point is 500°C, and the 10% distillation point temperature of the heavy distillate at the bottom of the tower is 510°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 device, which are respectively filled with protective agent, demetallization agent, desulfurizer and denitrification agent, and the filling volume ratio is 5:40:30:25. The hydrogen treatment process conditions are shown in Table 2; The liquid phase stream 6 is mixed with the unhydrogenated middle distillate oil 4 and then heated by the heat...

Embodiment 3

[0035] Using the same catalytic oil slurry as in Example 1 as raw material, the 10% distillation point temperature of the light distillate oil on the 2nd tower of the vacuum deep drawing device is 330 ° C, the 90% distillation point temperature is 350 ° C, and 10% of the middle distillate oil is distilled The point temperature is 370°C, the 90% distillation point is 480°C, and the 10% distillation point temperature 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 : There are four reactors in the device, which are filled with protective agent, demetallizer, desulfurizer and denitrification agent respectively, and the filling volume ratio is 5:40:30:25. The hydrotreating process conditions are shown in Table 2; after hydrotreating, the The liquid phase stream 6 mixed with the unhydrogenated middle distillate oil 4 enters the coking tow...

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Abstract

The invention discloses a combined process for producing a high-end graphite material. The process comprises the following steps: fractionating raw oil with a reduced-pressure distillation device to obtain light distillate oil, middle distillate oil and heavy distillate oil; allowing the middle distillate oil to enter a hydrotreating device; heating a liquid-phase product which is obtained after hydrotreatment and is used as a material for forming an intermediate phase by using a heating furnace a and then allowing the liquid-phase product to enter a coke tower; allowing coking gas generated by the coke tower to pass through a coking fractionating tower to obtain coker gas oil; mixing the coker gas oil and the light distillate oil separated from the raw oil by the reduced-pressure distillation device to obtain a mixture serving as a coke drawing material; and sequentially completing an intermediate phase forming stage and a coke drawing stage in the coke tower so as to obtain the high-end graphite material. The high-end graphite material continuously produced by the method has the advantages of stable streamline texture, low thermal expansion coefficient and the like, and is suitable for producing an ultrahigh-power graphite electrode.

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 Applications(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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