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Modified pitch, pitch coke and preparation methods and application thereof

A technology for modifying pitch and pitch coke, which is applied in chemical processing of tar pitch/petroleum pitch/natural pitch, chemical instruments and methods, electrical components, etc. The internal structure of the product is uneven and the content of volatile components is high, so as to achieve the effect of reducing the preparation cost, low volatile content and uniform internal structure.

Active Publication Date: 2021-05-28
NINGBO SHANSHAN NEW MATERIAL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is to overcome the common defects of localized coking in pitch coke in the prior art, the internal structure of the product is uneven, the content of volatile components is high, and it cannot be used in the field of high-performance lithium-ion battery negative electrode materials, etc., and provide a A kind of modified pitch, pitch coke and its preparation method and application

Method used

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  • Modified pitch, pitch coke and preparation methods and application thereof

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Embodiment 1

[0034] Coal tar pitch with a softening point of 60°C and isopolyvanadate catalyst (NH 4 ) 4 V 4 o 12 2H 2 O, mixed at a mass ratio of 1:0.001, added to a reactor with a reflux device and an air distributor at the bottom, fed with air, the air flow rate was 10L / h, and the temperature was raised to 340 at a heating rate of 3°C / min. ℃, keep the temperature at 340℃ for 1h. Stop the air flow after the constant temperature is over, switch to nitrogen flow, the nitrogen flow rate is 1L / h, continue to raise the temperature of the reactor to 490°C at a heating rate of 3°C / min, and keep the temperature at 490°C for 3h to obtain pitch coke. figure 1 is the polarized photo of the obtained pitch coke, from figure 1 It can be seen that the prepared pitch coke has a fine mosaic structure, isotropy, uniform internal structure, and no local coking phenomenon.

Embodiment 2

[0036] Coal tar pitch with a softening point of 60°C and isopolyvanadate catalyst (NH 4 ) 4 V 4 o 12 2H 2 O, mixed at a mass ratio of 1:0.002, added to a reactor with a reflux device and an air distributor at the bottom, fed with air, the air flow rate was 10L / h, and the temperature was raised to 340 at a heating rate of 3°C / min °C, keep the temperature at 340 °C for 3 hours. Stop the air flow after the constant temperature is over, switch to nitrogen flow, the nitrogen flow rate is 1L / h, continue to raise the temperature of the reactor to 490°C at a heating rate of 3°C / min, and keep the temperature at 490°C for 6h to obtain pitch coke.

Embodiment 3

[0038] Coal tar pitch with a softening point of 60°C and isopolyvanadate catalyst (NH 4 ) 4 V 10 o 26 ·6H 2O, mixed at a mass ratio of 1:0.002, added to a reactor with a reflux device and an air distributor at the bottom, fed with air, the air flow rate was 20L / h, and the temperature was raised to 340 at a heating rate of 3°C / min ℃, keep the temperature at 340℃ for 1h. Stop the air flow after the constant temperature is over, switch to nitrogen flow, the nitrogen flow rate is 1L / h, continue to raise the temperature of the reactor to 490°C at a heating rate of 3°C / min, and keep the temperature at 490°C for 3h to obtain pitch coke.

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Abstract

The invention discloses modified pitch, pitch coke and preparation methods and application thereof. The preparation method of the modified pitch comprises the following step: carrying out oxidation cross-linking reaction on coal pitch and an isopolyoxovanadate catalyst to prepare the modified pitch. The pitch coke obtained by carrying out polycondensation and coking reaction on the modified pitch has a fine mosaic structure and isotropy, is uniform in internal structure, free of local coking phenomenon, low in raw material cost, low in pitch coke volatile component, simple in process, high in operability and green and environment-friendly in reaction process, and can meet the characteristic requirements of the lithium ion battery negative electrode material.

Description

technical field [0001] The invention relates to a modified pitch, a pitch coke, a preparation method and application thereof. Background technique [0002] Coal tar pitch has the characteristics of abundant resources, low price, high carbon content, good fluidity, and easy graphitization. It is one of the most important and basic matrix precursors in the production of various carbon materials. The structure and composition of coal tar pitch are very complex, consisting of a large number of highly polycondensed carbon rings and heterocyclic compounds. It has the same composition and structure as coal, but there are differences in the degree of cyclization and molecular composition. Its molecular weight distribution range widely. As the special requirements of lithium-ion battery terminal application segments become more and more diverse, anode materials based on coal tar pitch are also gradually being paid attention to. Due to its complex molecular structure and composition...

Claims

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Application Information

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IPC IPC(8): C10C3/04B01J27/24H01M4/583
CPCB01J27/24C10C3/04H01M4/583Y02E60/10
Inventor 沈龙范拯华张秀云陈兵帅
Owner NINGBO SHANSHAN NEW MATERIAL TECH
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