A kind of needle coke and preparation method thereof

A needle coke and thermal melting technology, which is used in coke ovens, coking carbonaceous materials, petroleum industry, etc., can solve the problems of high cost, complex needle coke process, and low yield.

Active Publication Date: 2021-05-25
广东煤基碳材料研究有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] Therefore, the technical problem to be solved by the present invention is to overcome the defects of complicated needle coke process, high cost, low yield and poor quality stability in the prior art, thereby providing a needle coke and its preparation method

Method used

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  • A kind of needle coke and preparation method thereof
  • A kind of needle coke and preparation method thereof
  • A kind of needle coke and preparation method thereof

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[0032] The heavy product of lignite thermal catalysis process is the by-product produced in the process of lignite preparation of liquid fuel by thermal catalysis: provided by Zhaoqing Shunxin Coal Chemical Technology Co., Ltd.; the specific preparation method includes the following steps, 30~ 50wt% lignite powder, 50-70wt% 1-methylnaphthalene and 0.01-5wt% halide catalyst are fully stirred and mixed to form a coal slurry, and the coal slurry is thermally dissolved and catalyzed to generate a thermally soluble product. The hydrogen temperature is 400-500°C, the pressure is 6-13MPa, the hydrogen-oil volume ratio is 400-600, and the space velocity is 0.2-1.2h -1 , the reaction time is 30 to 60 minutes, and the thermally liquefied product is separated into light hot melt and lignite thermally dissolved catalytic heavy component, wherein the separation method includes normal pressure separation or reduced pressure separation, and the light hot melt is For the front fraction lower ...

Embodiment 1

[0038] 30wt% lignite powder, 65wt% 1-methylnaphthalene and 0.05wt% zinc iodide catalyst are fully stirred and mixed to form a coal slurry, and the coal slurry is thermally dissolved and catalyzed to generate a thermally soluble product. The hydrogenation temperature is 420°C and the pressure is 6MPa , the volume ratio of hydrogen to oil is 500, and the space velocity is 1h -1 , separating the obtained thermal solution product through vacuum distillation to obtain lignite thermally soluble catalytic heavy components with a boiling point between 450 and 500°C;

[0039] Take 1 ton of the heavy product of the lignite hot-melt catalytic process with a boiling point between 450 and 500°C and add 1 ton of tetralin as a hydrogen-donating solvent to dissolve it. is 5MPa, and the reaction time is 1 hour to obtain a hydrogenated asphalt mixture. Then the hydrogenated bitumen mixture is transported into the flash tower, the flash temperature is controlled to be 320°C, the top pressure of...

Embodiment 2

[0041] Fully stir and mix 45wt% lignite powder, 58.3wt% 1-methylnaphthalene and 1wt% zinc iodide catalyst to form a coal slurry. The coal slurry is hot-dissolved and catalyzed to generate a hot solution product. The hydrogenation temperature is 500°C and the pressure is 10MPa , The volume ratio of hydrogen to oil is 450, and the space velocity is 0.5h -1 , separating the obtained thermally liquefied product through vacuum distillation to obtain lignite thermally soluble catalytic heavy components with a boiling point between 480 and 510°C;

[0042] Take 2 tons of heavy products of the lignite hot-melt catalytic process with a boiling point between 480 and 510°C and 16 tons of hydrogen-donating solvent hot-melt catalytic light oil for dissolution, and transport the dissolved materials into the hydrogenation tower, and control the reaction temperature to 360°C. The reaction pressure was 9 MPa, and the reaction time was 2 hours to obtain a hydrogenated bitumen mixture. Then the ...

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Abstract

The invention provides a needle coke and a preparation method thereof, belonging to the technical field of carbon material preparation. The needle coke produced by hydrogenation, flash distillation, heat treatment, coking and calcination can not only greatly reduce the content of primary quinoline insolubles in the needle coke product, and promote the transformation of hydrogenated pitch to mesophase pitch, but also significantly It reduces the loss of high-value components in the reaction process, improves the yield and quality stability of high-quality needle coke products, and finally produces a product with an expansion coefficient of less than 10 ‑6 / ℃, true density not less than 2.15g / cm 3 , a high-quality needle coke product with a yield of not less than 60%.

Description

technical field [0001] The invention relates to the technical field of carbon material preparation, in particular to a needle coke and a preparation method thereof. Background technique [0002] Needle coke is a high-quality carbon with silver gray and metallic luster that appeared in the 1970s. Because of its high mechanical strength, high degree of order, high density, low resistivity and low thermal expansion coefficient, It is generally used in the production of high-power graphite electrodes and ultra-high-power graphite electrodes for steelmaking. In addition, with the rapid development of new energy electric vehicles in recent years, needle coke, as a high-quality soft carbon with good conductivity and easy graphitization, will also be widely used in the production of lithium battery negative electrode materials. [0003] According to different production raw materials, needle coke can be divided into coal-based needle coke and petroleum-based needle coke. At presen...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10B55/00
CPCC10B55/00
Inventor 吴克徐熠罗鹏陈翀
Owner 广东煤基碳材料研究有限公司
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