Method for continuously preparing carbon aerogel precursor

A carbon aerogel and precursor technology, which is applied in the field of continuous preparation of carbon aerogel precursors, can solve the problems of inability to meet large-scale production requirements, restricting the mass production of carbon aerogels, and uncontrollable production methods. To achieve the effect of good heat transfer capacity, high production efficiency and small volume

Active Publication Date: 2021-03-16
SINOSTEEL MAANSHAN INST OF MINING RES +2
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In addition, this uncontrollable production method is not conducive to the safety and environmental protection of workshop production
[0005] Therefore, as the demand for carbon aerogels increases, the one-pot method of traditional reactors cannot meet the needs of large-scale production, which seriously restricts the mass production of carbon aerogels.

Method used

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  • Method for continuously preparing carbon aerogel precursor

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] (1) The molar ratio of resorcinol and formaldehyde is 1:1.5, stirred and dissolved at 30° C. to obtain an aqueous solution of an airgel precursor;

[0025] (2) Add the surfactant Span 80 to 15# white oil, stir evenly at 30° C. to prepare a white oil mixture, and Span 80 accounts for 10% of the volume of the white oil mixture;

[0026] (3) Control the flow rate of the precursor aqueous solution to 30ml / min, the white oil flow rate to 10ml / min, the flow ratio to 3:1, and the emulsification pump speed to 1000r / min, so that the two are fully mixed into a suspension in the emulsification pump;

[0027] (4) Preheat the tubular reactor to 80°C in advance, and the suspension goes out of the emulsification pump and directly enters the tubular reactor, and the material flows through the tubular reactor for 10 hours to obtain the precursor white oil slurry;

[0028] (5) Finally, the slurry is subjected to suction filtration, washed with dichloromethane, and then suction filtration...

Embodiment 2

[0030] (1) According to the molar ratio of resorcinol and formaldehyde is 1:2, stirring and dissolving at 20°C to obtain an aqueous solution of airgel precursor;

[0031] (2) Add the surfactant Span 80 to 15# white oil, stir evenly at 20° C. to prepare a white oil mixture, and Span 80 accounts for 20% of the volume of the white oil mixture;

[0032] (3) Control the flow rate of the precursor aqueous solution to 50ml / min, the white oil flow rate to 10ml / min, the flow ratio to 5:1, and the emulsification pump speed to 1000r / min, so that the two are fully mixed into a suspension in the emulsification pump;

[0033] (4) Preheat the tubular reactor to 90°C in advance, and the suspension goes out of the emulsification pump and directly enters the tubular reactor, and the material flows through the tubular reactor for 7.5 hours to obtain the precursor white oil slurry;

[0034] (5) Finally, the slurry was centrifuged, washed with ethanol at 60°C, and then centrifuged to obtain the pr...

Embodiment 3

[0036] (1) According to the molar ratio of resorcinol and formaldehyde is 1:3, stirring and dissolving at 30° C. to obtain an aqueous solution of airgel precursor;

[0037] (2) Add the surfactant Span 80 to 15# white oil, stir evenly at 30° C. to prepare a white oil mixture, and Span 80 accounts for 10% of the volume of the white oil mixture;

[0038] (3) Control the flow rate of the precursor aqueous solution to 30ml / min, the white oil flow rate to 30ml / min, the flow ratio to 1:1, and the emulsification pump speed to 1000r / min, so that the two are fully mixed into a suspension in the emulsification pump;

[0039] (4) Preheat the tubular reactor to 95°C in advance, and the suspension exits the emulsification pump and directly enters the tubular reactor, and the material flows through the tubular reactor for 7.5 hours to obtain the precursor white oil slurry;

[0040] (5) Finally, the slurry is subjected to suction filtration, washed with dichloromethane, and then suction filtr...

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Abstract

The invention discloses a method for continuously preparing a carbon aerogel precursor. The method comprises the following steps: adding resorcinol into an aqueous formaldehyde solution, and carryingout stirring and dissolving to obtain an aqueous aerogel precursor solution; adding a surfactant into the white oil, and carrying out stirring for dissolving; controlling the flow ratio of the aqueousprecursor solution to the white oil and allowing the aqueous precursor solution and the white oil to be fully mixed in an emulsifying pump to form a suspension; discharging the suspension out of theemulsifying pump, directly feeding the suspension into a tubular reactor, and carrying out heating to realize a full reaction of an aqueous solution to obtain precursor white oil slurry; and finally,filtering and washing the slurry to obtain the carbon aerogel precursor. The method of the invention has the advantages of accurate temperature control, accurate reaction time control, simple operation, high production efficiency, safety and environmental protection performance; and the prepared carbon aerogel precursor is high in tap density after being dried and carbonized, has a certain specific surface area, can be further activated to obtain carbon aerogel with a higher specific surface area, and can be applied to carbon aerogel production.

Description

technical field [0001] The invention belongs to the field of carbon airgel preparation, and in particular relates to a continuous preparation method of a carbon airgel precursor, which can be applied in the production of carbon airgel. Background technique [0002] Carbon airgel has good application potential in new batteries, environmental protection, biomedical and other national strategic emerging industries, especially as a substitute for super activated carbon, which exhibits low resistivity, high specific capacitance, Excellent performance of strong cycle performance. However, due to the complex preparation process, long production cycle, and difficulty in continuous production, it is difficult to industrialize carbon airgel products. [0003] In recent years, domestic research on the production process of carbon airgel has increased, and mass production has been achieved. During the preparation of carbon airgel precursors, a unique shape and pore structure are forme...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J13/00C01B32/05
CPCB01J13/0091C01B32/05Y02E60/13
Inventor 许传华何庆雅金亮潘哲
Owner SINOSTEEL MAANSHAN INST OF MINING RES
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