Technology for producing coal-series needle coke by taking middle-temperature and low-temperature coal tar asphalt as raw material

A low-temperature coal tar, needle coke technology, applied in the processing of tar pitch/petroleum pitch/natural pitch, tar processing by distillation, chemical processing of tar pitch/petroleum pitch/natural pitch, etc. The quality of coke products needs to be improved, the performance and quality of needle coke products are affected, and the pretreatment burden and difficulty are difficult to achieve the effect of narrow molecular weight distribution, excellent performance and high yield.

Active Publication Date: 2018-02-16
NORTHWEST UNIV +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The above-mentioned 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. The burden and difficulty of pretreatment are large; (2) the QI content of refined pitch can only be r

Method used

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  • Technology for producing coal-series needle coke by taking middle-temperature and low-temperature coal tar asphalt as raw material
  • Technology for producing coal-series needle coke by taking middle-temperature and low-temperature coal tar asphalt as raw material
  • Technology for producing coal-series needle coke by taking middle-temperature and low-temperature coal tar asphalt as raw material

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Effect test

Embodiment 1

[0035] The above-mentioned non-metallic homogeneous mild hydrogenation catalyst is used in the process of producing coal-based needle coke with medium and low temperature coal tar pitch as raw material. The specific process steps are:

[0036] (1) Put 1 kg of medium-low temperature coal tar in a 2L high-temperature and high-pressure reaction kettle, and cut it through vacuum distillation to obtain 486.4 g of medium-low temperature coal tar pitch with a fraction of 350°C to 450°C.

[0037] (2) 700g of toluene and 300g of n-heptane are mixed and prepared as an extractant, and the medium and low temperature coal tar pitch fraction of step (1) is extracted for 12 hours at 85°C to remove the quinoline contained in the medium and low temperature coal tar pitch Insoluble matter, the content of quinoline insoluble matter (QI) was 0.084wt%.

[0038] (3) The medium and low temperature coal tar pitch after the extraction treatment is sent into the reactor, and then 30g of the above-menti...

Embodiment 2

[0044] The above-mentioned non-metallic homogeneous mild hydrogenation catalyst is used in the process of producing coal-based needle coke with medium and low temperature coal tar pitch as raw material. The specific process steps are:

[0045] (1) Put 1 kg of medium-low temperature coal tar in a 2L high-temperature and high-pressure reaction kettle, and cut it through vacuum distillation to obtain 479.8 g of medium-low temperature coal tar pitch of 350°C-450°C fraction.

[0046] (2) 600g of toluene and 400g of n-heptane are mixed and prepared as an extractant, and the medium and low temperature coal tar pitch fraction of step (1) is extracted for 12 hours at 70°C to remove the quinoline contained in the medium and low temperature coal tar pitch Insoluble matter, the content of quinoline insoluble matter (QI) is 0.097wt%.

[0047] (3) The medium and low temperature coal tar pitch after the extraction treatment is sent into the reactor, and then 15g of the above-mentioned non-me...

Embodiment 3

[0052] The above-mentioned non-metallic homogeneous mild hydrogenation catalyst is used in the process of producing coal-based needle coke with medium and low temperature coal tar pitch as raw material. The specific process steps are:

[0053] (1) Put 1 kg of medium-low temperature coal tar in a 2L high-temperature and high-pressure reaction kettle, and cut it through vacuum distillation to obtain 482.3 g of medium-low temperature coal tar pitch of 350°C-450°C fraction.

[0054] (2) 500g xylene and 500g hexanaphthene are mixed and prepared as an extractant, and the medium and low temperature coal tar pitch fraction of step (1) is extracted for 15 hours at 65°C to remove the quinone contained in the medium and low temperature coal tar pitch Phenyl insolubles, so that quinoline insolubles (QI) content is 0.093wt%.

[0055] (3) The medium and low temperature coal tar pitch after the extraction treatment is sent into the reactor, and then 20g of the above-mentioned non-metallic ho...

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Abstract

The invention relates to a technology for producing coal-series needle coke by taking middle-temperature and low-temperature coal tar asphalt as a raw material. The technology mainly comprises the following steps: carrying out decompression and distillation, and extraction and removal on middle-temperature and low-temperature coal tar; combining hydrogenation treatment, thermal polymerization andcalcining technologies under the action of a non-metal homogeneous mild-hydrogenation catalyst to prepare the coal-series needle coke with good performance and relatively high yield. The non-metal homogeneous mild-hydrogenation catalyst is mainly prepared from the following raw materials in percentage by mass: 55 weight percent to 79 weight percent of semi-coke, 20 weight percent to 40 weight percent of coke and 1 weight percent to 5 weight percent of graphene. According to the technology provided by the invention, after the raw material is subjected to combined pre-treatment, a refined asphalt raw material is reasonable in constitution and has a few of impurities; the catalyst has excellent modification performance and does not need to be separated subsequently; the graphene component also can be used for promoting a middle phase in a thermal polymerization process to form a wide-area and ordered fibrous structure and a high-performance needle coke product is easy to form.

Description

technical field [0001] The invention belongs to the technical field of mild hydrogenation catalysts, and in particular relates to a process for producing coal-based needle coke using medium-low temperature coal tar as a raw material. Background technique [0002] Needle coke is a vigorously developed carbon material. It has excellent properties such as low thermal expansion coefficient, low impurity content, good graphitization performance, good electrical conductivity, high heat resistance and mechanical strength, and excellent oxidation resistance. Needle coke The material can also greatly reduce the smelting time and energy consumption of electric furnace steelmaking. Compared with ordinary electrode steelmaking, it can shorten the smelting time of electric furnace steelmaking by 50%-70%, reduce power consumption by 20%-50%, and increase production capacity by 1.3 times. Widely used in national defense and metallurgical industries, it is the raw material for the productio...

Claims

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Application Information

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IPC IPC(8): B01J21/18C10C1/16C10C3/08C10C3/02C10C3/00C10B55/00
CPCB01J21/18C10B55/00C10C1/16C10C3/00C10C3/02C10C3/08
Inventor 李冬郑金欣黄晔任军哲崔楼伟王莉莎李稳宏
Owner NORTHWEST UNIV
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