A method for preparing needle coke from kerosene co-refining residue

A technology of kerosene co-residue and needle coke, applied in coking ovens, petroleum industry, coking carbonaceous materials, etc., can solve the problems of high reaction pressure, high energy consumption, complex process, etc., and achieve short time consumption and low pressure , The effect of continuous process

Active Publication Date: 2021-05-04
SHANXI INST OF COAL CHEM CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The above technologies have the disadvantages of complex process, high reaction pressure, and high energy consumption. There is no technical report on the preparation of needle coke from kerosene co-refining residue as raw material.

Method used

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  • A method for preparing needle coke from kerosene co-refining residue
  • A method for preparing needle coke from kerosene co-refining residue
  • A method for preparing needle coke from kerosene co-refining residue

Examples

Experimental program
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Effect test

Embodiment 1

[0027] 100g of kerosene co-refining residue (450,000 tons / year kerosene co-refining residue of Yanchang Petroleum Group, asphaltene content of 50wt%, ash content of 28wt%) and 400g of toluene and n-heptane mixed solvent (mass ratio of 1:1 ) uniformly mixed at room temperature and extracted at 150° C. for 2 hours, asphaltenes with a softening point of 95° C., no ash, and a molecular weight distribution of 300-600 were isolated, and the yield of the asphaltenes was 47%.

[0028] Put the asphaltene into the heating furnace, under the protection of normal pressure nitrogen, heat to 430 ℃ at 5 ℃ / min, and keep it for 1 hour; Hours, 18g needle coke was obtained with a true density of 2.18g / cm 3 , The coefficient of thermal expansion CTE is 0.95×10 -6 / °C, sulfur content 0.02wt%, anhydrous, ash-free, superior to the domestic standard of coal-based needle coke.

Embodiment 2

[0030] 100g of kerosene co-refining residue (450,000 tons / year kerosene co-refining residue of Yanchang Petroleum Group, asphaltene content of 48wt%, ash content of 29wt%) and 600g of mixed solvent of xylene and n-hexane (mass ratio of 3:1 ) uniformly mixed at room temperature and extracted at 110° C. for 5 hours, then extracted and separated to obtain asphaltenes with a softening point of 80° C., no ash, and a molecular weight distribution of 300-550. The yield of asphaltenes was 41%.

[0031] Put the asphaltene into the heating furnace, under the protection of 0.3MPa nitrogen, heat at 3°C / min to 420°C, and keep it for 2 hours; , get 16g needle coke, its true density is 2.13g / cm 3 , The coefficient of thermal expansion CTE is 0.96×10 -6 / °C, sulfur content 0.016wt%, anhydrous, ash-free, superior to the domestic standard of coal-based needle coke.

Embodiment 3

[0033]100g of kerosene co-refining residue (450,000 tons / year kerosene co-refining residue of Yanchang Petroleum Group, asphaltene content of 45wt%, ash content of 27wt%) and 1000g of mixed solvent of toluene and n-hexane (mass ratio is 4:1) Uniformly mixed at room temperature, extracted at 70°C for 12 hours, and separated to obtain asphaltenes with a softening point of 70°C, no ash, and a molecular weight distribution of 310-580. The yield of the asphaltenes is 40%.

[0034] Put the asphaltene into the heating furnace, under the protection of 0.2MPa nitrogen, heat at 5°C / min to 450°C, keep it for 5 hours; then under the protection of 0.2MPa nitrogen, raise the temperature to 1300°C at 10°C / min, and calcined for 1 hour, Obtain 15g needle coke, its true density is 2.16g / cm 3 , The coefficient of thermal expansion CTE is 0.95×10 -6 / °C, sulfur content 0.018wt%, anhydrous, ash-free, superior to the domestic standard of coal-based needle coke.

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Abstract

A method for preparing needle coke from kerosene co-refining residue is to separate kerosene co-refining residue through solvent extraction and filtration to obtain asphaltenes rich in condensed rings and with a molecular weight distribution of 300-800, put the asphaltenes into a heating furnace, and Under normal pressure-0.3MPa, heat to heat treatment temperature 350-450°C, keep the temperature constant for 1-2h, then continue heating to 900-1500°C for 1-2h under nitrogen atmosphere and normal pressure-0.3MPa to obtain needle coke. The invention has the advantages of simple process, low reaction pressure and low energy consumption.

Description

technical field [0001] The invention belongs to a method for preparing needle coke, in particular to a method for preparing needle coke with kerosene co-refining residue. [0002] technical background [0003] The appearance of needle coke is a silver-gray porous solid with metallic luster. Its structure has obvious flow texture. The pores are large and few and slightly elliptical. The particles have a large aspect ratio and have a fibrous or needle-like texture. , a carbon material with a lubricating feel to the touch; it has the advantages of small resistivity, small thermal expansion coefficient, strong impact resistance, high mechanical strength, good oxidation resistance, and low consumption. It is the best choice for the production of ultra-high power electrodes and special carbon material products There is also a huge demand for raw materials in lithium batteries, nuclear power, aerospace and other fields. Compared with the use of ordinary electrodes, the electric fur...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10B55/02C10B57/08
CPCC10B55/02C10B57/08
Inventor 申文忠曲世杰左萍萍牛宏贤李充梅
Owner SHANXI INST OF COAL CHEM CHINESE ACAD OF SCI
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