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Preparation method of hydrophilic activated carbon

An activated carbon and hydrophilic technology, applied in the field of preparation of hydrophilic activated carbon, can solve the problems of activated carbon pore structure damage, activated carbon quality loss, etc., and achieve the effects of increased micropore content, low production cost, and stable process

Inactive Publication Date: 2018-08-10
SHAOXING UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The quality of activated carbon will be greatly lost in this process, and the original pore structure of activated carbon will also be greatly damaged.

Method used

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  • Preparation method of hydrophilic activated carbon

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Effect test

Embodiment 1

[0035] A preparation method for hydrophilic activated carbon, comprising the steps of:

[0036] Step 1, adding sodium polyacrylate to propylene glycol, mechanically stirring until completely dissolved, to obtain sodium polyacrylate alcohol solution;

[0037] Step 2, adding activated carbon to the sodium polyacrylate alcohol solution, adding a dispersant and stirring to form a stable suspension;

[0038] Step 3, sealing and stirring the suspension for 2 hours, and then distilling and reacting for 2 hours under reduced pressure to obtain prefabricated activated carbon;

[0039] Step 4, putting the prefabricated activated carbon into an oven for vacuum drying to obtain hydrophilic activated carbon.

[0040] The concentration of sodium polyacrylate in propylene glycol in the step 1 is 20g / L, and the stirring speed of the mechanical stirring is 2000r / min.

[0041] The addition of activated carbon in the step 2 is 2.5 times of the quality of sodium polyacrylate, and the addition o...

Embodiment 2

[0053] A preparation method for hydrophilic activated carbon, comprising the steps of:

[0054] Step 1, adding sodium polyacrylate to propylene glycol, mechanically stirring until completely dissolved, to obtain sodium polyacrylate alcohol solution;

[0055] Step 2, adding activated carbon to the sodium polyacrylate alcohol solution, adding a dispersant and stirring to form a stable suspension;

[0056] Step 3, sealing and stirring the suspension for 4 hours, and then distilling and reacting for 4 hours under reduced pressure to obtain prefabricated activated carbon;

[0057] Step 4, putting the prefabricated activated carbon into an oven for vacuum drying to obtain hydrophilic activated carbon.

[0058] The concentration of sodium polyacrylate in propylene glycol in the step 1 is 50g / L, and the stirring speed of the mechanical stirring is 3000r / min.

[0059] The addition of activated carbon in the step 2 is 5.5 times of the quality of sodium polyacrylate, and the addition o...

Embodiment 3

[0071] A preparation method for hydrophilic activated carbon, comprising the steps of:

[0072] Step 1, adding sodium polyacrylate to propylene glycol, mechanically stirring until completely dissolved, to obtain sodium polyacrylate alcohol solution;

[0073] Step 2, adding activated carbon to the sodium polyacrylate alcohol solution, adding a dispersant and stirring to form a stable suspension;

[0074] Step 3, sealing and stirring the suspension for 3 hours, then distilling and reacting for 3 hours under reduced pressure to obtain prefabricated activated carbon;

[0075] Step 4, putting the prefabricated activated carbon into an oven for vacuum drying to obtain hydrophilic activated carbon.

[0076] The concentration of sodium polyacrylate in propylene glycol in the step 1 is 40g / L, and the stirring speed of the mechanical stirring is 2500r / min.

[0077] The addition of activated carbon in the step 2 is 4.5 times of the quality of sodium polyacrylate, and the addition of th...

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Abstract

The invention belongs to the technical field of modification of activated carbon and in particular relates to a preparation method of hydrophilic activated carbon. The preparation method comprises thefollowing steps: step 1, adding sodium polyacrylate into propylene glycol; mechanically stirring until sodium polyacrylate is completely dissolved, so as to obtain a sodium polyacrylate alcohol solution; step 2, adding the activated carbon into the sodium polyacrylate alcohol solution; adding a dispersant and stirring to form stable suspension liquid; step 3, sealing the suspension liquid and stirring and reacting for 2 to 4h; then decompressing and distilling to react for 2 to 4h, so as to obtain pre-prepared activated carbon; step 4, putting the pre-prepared activated carbon into a drying oven and drying in vacuum to obtain the hydrophilic activated carbon. According to the preparation method provided by the invention, a polyacrylate radical is grafted in an activated carbon framework and hydrophilic modification of the activated carbon can be formed; a polyacrylate-activated carbon dual water absorption effect is formed and the hydrophilic performance of the modified activated carbon is greatly improved.

Description

technical field [0001] The invention belongs to the technical field of activated carbon modification, and in particular relates to a preparation method of hydrophilic activated carbon. Background technique [0002] Water vapor is one of the ubiquitous substances in nature. However, in some specific environments, such as precision instrument laboratories, warehouses, petroleum liquefied gas stations, etc., it is necessary to strictly control the content of water vapor to prevent major safety accidents caused by short circuits, corrosion, condensation, etc. with loss. [0003] Adsorption is widely used because of its simple operation, easy recovery and avoidance of secondary pollution. Activated carbon has become one of the preferred adsorbents due to its developed pore structure, large specific surface area, abundant surface functional groups, and low price. At low relative humidity, Dimotakis et al. believed that the hydrophilic functional groups on the surface of activat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/26B01D53/28B01D53/26B01J20/30
CPCB01D53/261B01D53/28B01D2257/80B01J20/20B01J20/261
Inventor 刘伟
Owner SHAOXING UNIVERSITY
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