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A kind of low-temperature catalytic modified asphalt and its preparation method

A technology of modified asphalt and low-temperature catalysis, which is applied in chemical processing of tar pitch/petroleum pitch/natural pitch, and distillation of tar pitch/petroleum pitch/natural pitch, etc. , the problem of short service life of the reactor

Active Publication Date: 2021-04-16
WUHAN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In summary, the existing technology cannot produce qualified products that meet the ideal binder of carbon products, and can avoid the problems of high reaction temperature in the reactor, easy local coking, and short service life of the reactor

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] A low-temperature catalytically modified asphalt and a preparation method thereof. The preparation method described in this embodiment is:

[0022] Put 100 parts by mass of medium-temperature coal tar pitch in a reaction kettle with a distillation device, heat it to 105°C at a heating rate of 8°C / min, and stir at a speed of 100rpm for 10min under heat preservation conditions; Add 0.001 parts by mass of anhydrous aluminum trichloride, heat to 280°C at a heating rate of 10°C / min, and stir for 200min at a speed of 150rpm under heat preservation conditions; Under the condition of -0.09MPa, distill under reduced pressure for 30 minutes to distill off light components to obtain low-temperature catalytically modified asphalt.

[0023] The low-temperature catalytically modified asphalt prepared in this example has a softening point of 106° C.; a toluene insoluble content of 26 percent; a quinoline insoluble content of 8 percent; a coking value of 54 percent; and an ash content...

Embodiment 2

[0025] A low-temperature catalytically modified asphalt and a preparation method thereof. The preparation method described in this embodiment is:

[0026] Put 100 parts by mass of medium-temperature coal tar pitch in a reaction kettle with a distillation device, heat it to 105°C at a heating rate of 6°C / min, and stir for 9min at a speed of 150rpm under heat preservation conditions; Add 0.001 parts by mass of anhydrous aluminum trichloride, heat to 300°C at a heating rate of 10°C / min, and stir for 180min at a speed of 160rpm under heat preservation conditions; Under the condition of -0.09MPa, distill under reduced pressure for 30 minutes to distill off light components to obtain low-temperature catalytically modified asphalt.

[0027] The low-temperature catalytically modified asphalt prepared in this example has a softening point of 107° C.; a toluene insoluble content of 28 percent; a quinoline insoluble content of 9 percent; a coking value of 55 percent; and an ash content ...

Embodiment 3

[0029] A method for preparing low-temperature catalytic modified asphalt. The preparation method described in this embodiment is:

[0030] Put 100 parts by mass of medium-temperature coal tar pitch in a reaction kettle with a distillation device, heat it to 105°C at a heating rate of 5°C / min, and stir at a speed of 200rpm for 8min under heat preservation conditions; then pour it into the reaction kettle Add 0.001 parts by mass of anhydrous aluminum trichloride, heat to 300°C at a heating rate of 11°C / min, and stir for 200min at a speed of 170rpm under heat preservation conditions; Under the condition of -0.09MPa, distill under reduced pressure for 30 minutes to distill off light components to obtain low-temperature catalytically modified asphalt.

[0031] The low-temperature catalytically modified asphalt prepared in this example has a softening point of 108° C.; a toluene insoluble content of 29 percent; a quinoline insoluble content of 9 percent; a coking value of 55.2 perc...

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Abstract

The invention relates to a low-temperature catalytic modified asphalt and a preparation method thereof. The technical scheme is: put 100 parts by mass of medium-temperature coal tar pitch in a reaction kettle with a distillation device, stir for 5 to 10 minutes under the conditions of 100-105°C and 100-300rpm; then add 0.001 ~0.002 parts by mass of anhydrous aluminum trichloride, stirred at 280~300°C and 150~200rpm for 150~200min; then distilled at 280~300°C, 100~150rpm and a vacuum of -0.09MPa After 20-30 minutes, light components are distilled off under reduced pressure to obtain low-temperature catalytically modified asphalt. The invention has the characteristics of simple process, low cost, low polymerization reaction temperature, avoiding ax bottom coking and prolonging the service life of the reactor, and the prepared products meet the standards, have stable product quality and good performance.

Description

technical field [0001] The invention belongs to the technical field of modified asphalt. In particular, it relates to a low-temperature catalytic modified asphalt and a preparation method thereof. [0002] technical background [0003] Modified pitch, also known as graphite electrode pitch, electrode bonding pitch and high-quality pitch, is mostly used as ultra-high or high-power electrodes for electric furnace steelmaking, anode paste for electrolytic aluminum, and binders for carbon products. As an ideal binder for carbon products, modified pitch has the characteristics of higher toluene insolubles (TI), certain quinoline insolubles (QI), lower volatile content and higher β resin content, etc. Therefore, using modified pitch as a binder, the carbon products produced have the advantages of low resistance, good conductivity, high capacitance density, low power consumption, high strength, long life and small thermal expansion. In recent years, with the adjustment of the stru...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10C3/06C10C3/02
CPCC10C3/02C10C3/06
Inventor 陈胜春孙昱雷兴红万劲松刘小敏吴恒喜吴术彬雷红启张启刚李诚周尽晖
Owner WUHAN UNIV OF SCI & TECH
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