Method for continuously preparing mesocarbon microbeads with co-production of impregnant pitch and coating pitch

A technology of mesocarbon microspheres and mesocarbon microspheres, which can be used in the processing of tar pitch/petroleum pitch/natural pitch by chemical methods, and the processing of tar pitch/petroleum pitch/natural pitch by selective extraction, which can solve energy consumption Large size, heavy environmental pollution and other problems, to achieve the effect of avoiding material hanging on the wall, fast heating speed, and avoiding asphalt coking

Active Publication Date: 2016-01-27
ANSHAN XINGDE MATERIAL SCI & TECH
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Problems solved by technology

[0008] Aiming at the above-mentioned problems existing in the preparation technology of existing mesocarbon microspheres, the present invention provides a method for continuously preparing mesocarbon microspheres for co-production of impregnating agent pitch and coated pitch, which is carried out by continuous preparation equipment and thermal polymerization method Continuous production, solving problems such as large energy consumption and heavy environmental pollution, and obtaining a variety of products with stable quality

Method used

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  • Method for continuously preparing mesocarbon microbeads with co-production of impregnant pitch and coating pitch
  • Method for continuously preparing mesocarbon microbeads with co-production of impregnant pitch and coating pitch
  • Method for continuously preparing mesocarbon microbeads with co-production of impregnant pitch and coating pitch

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Effect test

Embodiment 1

[0058] Under the condition of nitrogen atmosphere, the temperature is 180 ℃ medium temperature coal tar pitch and the temperature is 180 ℃ stabilizer mixed, mixing ratio is medium temperature coal tar pitch by mass ratio: stabilizer=1:0.1, obtains the mixed material; described stable The agent is anthracene oil;

[0059] The mixed material is heated to 350°C and sent to the rapid temperature riser. In the rapid temperature riser, the temperature of the material is raised to 410°C within 1 second, and then enters the continuous polymerization reactor for polymerization at 410°C. The medium temperature coal tar pitch is controlled to continuously The reaction time in the polymerization reactor is 6h. After the reaction is completed, the material discharged from the continuous polymerization reactor contains polymerized pitch of mesocarbon microspheres;

[0060] Cool the polymerized pitch containing mesocarbon microspheres to 290°C, then mix it with the extractant and send it to ...

Embodiment 2

[0066] Method is with embodiment 1, and difference is:

[0067] (1) Under the condition of nitrogen atmosphere, mix the medium-temperature coal tar pitch with a temperature of 210°C and the stabilizer with a temperature of 210°C, and the mixing ratio is medium-temperature coal tar pitch:stabilizer=1:0.5 according to the mass ratio, and the mixture is obtained; The stabilizer mentioned above is washing oil;

[0068] (2) Heat the mixed material to 360°C and send it to the rapid temperature increaser. In the rapid temperature increaser, the material is heated to 430°C within 3 seconds, and then enters the continuous polymerization reactor to carry out polymerization reaction at 430°C to control the medium-temperature coal The reaction time of asphalt in the continuous polymerization reactor is 5h;

[0069] (3) Cool the polymerized pitch containing mesocarbon microspheres to 310°C, mix it with the extractant and send it to the extraction tank for extraction. The mixing ratio is t...

Embodiment 3

[0072] Method is with embodiment 1, and difference is:

[0073] (1) Under the condition of nitrogen atmosphere, mix the medium-temperature coal tar pitch with a temperature of 200°C and the stabilizer with a temperature of 20°C, and the mixing ratio is medium-temperature coal tar pitch:stabilizer=1:1 by mass ratio to obtain a mixture; The stabilizer mentioned above is steam;

[0074] (2) Heat the mixed material to 380°C and send it to the rapid temperature riser. In the rapid temperature riser, the material is heated to 450°C within 5 seconds, and then enters the continuous polymerization reactor to carry out polymerization reaction at 450°C to control the medium-temperature coal The reaction time of asphalt in the continuous polymerization reactor is 4h;

[0075] (3) Cool down the polymerized pitch containing mesocarbon microspheres to 340°C, then mix it with the extractant and send it to the extraction tank for extraction. The mixing ratio is the polymerized pitch containin...

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Abstract

A method for continuously preparing mesocarbon microbeads with co-production of impregnant pitch and coating pitch comprises steps as follows: (1), medium-temperature coal-tar pitch and a stabilizing agent are mixed under the nitrogen atmosphere; (2), a product of the step (1) is heated to 350-380 DEG C, then is sent to a fast heater and is heated to 410-450 DEG C in 1-5 s for a polymerization reaction; (3), a product of the step (2) is cooled to the temperature of 290-340 DEG C and is subjected to mixing extraction with an extracting agent; (4), a mesocarbon microbead product is obtained through centrifugal separation and solid-phase drying; (5), a mother solution is evaporated by a distillation column, the extracting agent is recycled, and the rest of materials at the column bottom is taken as the impregnant pitch or has a modification reaction through a modification reaction kettle. According to the method, the problems of high energy consumption, severe environmental pollution, low product yield, high cost, unstable quality, single variety and the like of a traditional production technology are solved fundamentally.

Description

technical field [0001] The invention relates to the technical field of mesocarbon microsphere materials, in particular to a method for continuously preparing mesocarbon microspheres for co-production of impregnating agent pitch and coating pitch. Background technique [0002] The negative electrode material is one of the important factors affecting the performance of lithium-ion batteries. Graphite or modified graphite is generally used in the prior art. However, its theoretical lithium intercalation capacity of 372mAh / g can no longer meet the demand, and its unique layered structure leads to limited times. cycle stability, and is also highly sensitive to the electrolyte, so it is urgent to find a new type of anode material to replace graphite. [0003] Mesophase carbon microspheres are ideal raw materials for negative electrode materials of lithium-ion batteries. At present, the processes for producing mesocarbon microspheres from coal tar pitch mainly include thermal cond...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B31/02C10C3/02C10C3/08
Inventor 朱兴建张力王永志王莹
Owner ANSHAN XINGDE MATERIAL SCI & TECH
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