Preparation method for high-purity high-softening-point asphalt

A technology of high softening point asphalt and production method, applied in the processing of tar pitch/petroleum pitch/natural pitch, processing tar pitch/petroleum pitch/natural pitch by chemical methods, processing tar pitch/petroleum pitch/natural pitch by distillation, etc. Direction, can solve the problems of low product QI value, uniform quality of oxidized asphalt products, low energy consumption, etc., and achieve the effect of less impurity content, high purity and simple production process

Active Publication Date: 2016-05-11
JINING CARBON GRP CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention is: in order to overcome the above technical problems, a production method for preparing high-purity high-softening point asphalt with reasonable design, high oxidation efficiency, uniform oxidation and low

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] Embodiment 1, a production method for preparing high-purity high-softening point asphalt described in this specific embodiment, comprising the following steps:

[0016] Add low-QI high-purity impregnating agent pitch into the stirring reaction kettle, and continuously introduce air and nitrogen, the flow rate of air is 10m3 / h, and the flow rate of nitrogen is 5m3 / h, while stirring, under the condition of 260 ℃ Air oxidation was carried out, and the oxidation time was 30h; then the oxidized asphalt was added to the scraped film evaporator, at 330 ° C, the vacuum negative pressure was 0.02MPa, and the film distillation was carried out under the condition of introducing nitrogen, and the flow rate of nitrogen was 7m3 / h, remove light components to obtain high-purity high-softening-point asphalt. The obtained high-purity high-softening-point asphalt has a softening point of 280 °C, a coking value of 80.5%, quinoline insolubles of 25%, and toluene insolubles of 65.5%. %, the...

Embodiment 2

[0017] Embodiment 2, a production method for preparing high-purity high-softening point asphalt described in this specific embodiment includes the following steps:

[0018] Add low-QI high-purity impregnating agent pitch into the stirring reaction kettle, and continuously introduce air and nitrogen, the flow rate of air is 10m3 / h, and the flow rate of nitrogen is 5m3 / h, while stirring, under the condition of 260 ℃ Air oxidation was carried out for 25 hours; then the oxidized asphalt was added to a wiper film evaporator, and film distillation was carried out at 330 ° C, vacuum negative pressure of 0.02 MPa, and nitrogen flow, and the flow rate of nitrogen was 7 m3 / h. , remove light components, and obtain high-purity high-softening point asphalt. The obtained high-purity high-softening point asphalt has a softening point of 250 ° C, a coking value of 77.5%, quinoline insolubles of 22.5%, and toluene insolubles of 58.5%. The volatile content is 36.3%, and the ash content is 0.028...

Embodiment 3

[0019] Embodiment 3, a production method for preparing high-purity high-softening point asphalt described in this specific embodiment, comprising the following steps:

[0020] Add low-QI high-purity impregnant pitch into the stirring reaction kettle, and continuously introduce air and nitrogen, the flow rate of air is 10m3 / h, and the flow rate of nitrogen is 5m3 / h, while stirring, under the condition of 270 ℃ Air oxidation was carried out, and the oxidation time was 25h; then the oxidized asphalt was added to the scraped film evaporator, and the film distillation was carried out at a temperature of 340 ° C, a vacuum negative pressure of 0.02 MPa, and a nitrogen flow, and the flow rate of nitrogen was 7m3 / h. Remove light components to obtain high-purity high-softening point asphalt. The obtained high-purity high-softening point asphalt has a softening point of 280°C, a coking value of 80%, quinoline insolubles of 26%, and toluene insolubles of 65%. %, the volatile matter conte...

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Abstract

The invention relates to a preparation method for high-purity high-softening-point asphalt. The preparation method includes (1), adding low-QI high-purity impregnant asphalt into a stirring reaction kettle, continuously injecting air and nitrogen, stirring the asphalt, and performing air oxidation at the temperature of 180-330 DEG C for 10-30 hours; (2), adding the oxidized asphalt obtained from the step (1) into a scrapper film evaporator, and performing film distillation with the presence of nitrogen at the temperature of 320-360 DEG C under the vacuum negative pressure of 0.02MPa to remove light components to obtain the high-purity high-softening-point asphalt. The preparation method has the advantages that the softening point of the obtained high-purity high-softening-point asphalt reaches 250-300 DEG C, the coking value is larger than or equal to 75%, quinoline insoluble is less than or equal to 28%, volatiles are less than or equal to 36%, and toluene insoluble is more than or equal to 58%; impurity content is low, purity is high, production process is simple, energy conservation and environment protection are achieved, and the preparation method can be widely applied to lithium ion battery cathode material coating and carbon fiber production.

Description

technical field [0001] The invention belongs to the technical field of coal chemical industry and the technical field of novel carbon materials, and in particular relates to a production method for preparing high-purity and high-softening-point pitch. Background technique [0002] As early as the 1960s, my country has already started the research on carbon fiber, but the research is slow. At the same time, due to the technical blockade imposed on my country by developed countries, industrial production has not been possible so far, which has seriously affected my country's high-tech development. At present, the main reason that restricts the development of carbon fiber in my country is that the high softening point spinning pitch of the raw material for producing carbon fiber cannot be industrialized. [0003] High softening point asphalt is widely used due to its superior high temperature resistance. Generally, the preparation method of high softening point asphalt is comp...

Claims

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Application Information

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IPC IPC(8): C10C3/04C10C3/06C10C3/00
CPCC10C3/00C10C3/04C10C3/06
Inventor 刘越韩波张稳昌胡春燕闫桂林
Owner JINING CARBON GRP CO LTD
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