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Method for regenerating activated carbon

A technology of activated carbon and alkaline substances, applied in separation methods, filter regeneration, chemical instruments and methods, etc., can solve the problems of affecting the adsorption effect of activated carbon, clogging carbon pores, and easy carbonization, so as to reduce costs, reduce losses, and improve The effect of regeneration speed

Inactive Publication Date: 2016-05-18
广州微碳科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the rapid temperature rise of this kind of regeneration, the macromolecular organic matter in the carbon pores is easy to carbonize, blocking the carbon pores, and affecting the adsorption effect of activated carbon after regeneration.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] The specific surface area of ​​powdered activated carbon new carbon in embodiment 1 is 1020.7m 2 / g, which is mainly used for pharmaceutical decolorization.

[0027] First, the regeneration solvent is obtained by mixing the following mass fractions: 4% sodium hydroxide, 95% ethanol and 1% water, and is heated to 100 degrees Celsius. The volume of the regeneration reagent and the volume of the saturated waste activated carbon are mixed and soaked in a ratio of 1:1. 10 minutes;

[0028] Secondly, the regeneration reagent is separated from the activated carbon solid-liquid, and the liquid part is re-distilled to collect the organic reagent, which can be recycled for the next regeneration; the separated solid is obtained to be treated activated carbon;

[0029] Again, the activated carbon to be treated obtained after the solid-liquid separation is washed with water twice the volume of the activated carbon to be treated, and the pretreated activated carbon is obtained by su...

Embodiment 2

[0034] The specific surface area of ​​granular activated carbon new carbon in embodiment 2 is 812m 2 / g, which is mainly used for tap water purification in waterworks.

[0035] First, the regeneration solvent is obtained by mixing the following mass fractions: 10% sodium carbonate, 65% acetone, and 25% water, and heated to 50 degrees Celsius. The volume of the regeneration reagent and the volume of the saturated waste activated carbon are mixed and soaked for 20 minutes according to the ratio of 1:3. ;Secondly, the regeneration reagent is separated from the activated carbon solid-liquid, the liquid part is re-distilled, and the organic reagent is collected, which can be recycled for the next regeneration; the separated solid obtains the activated carbon to be treated;

[0036] Again, the activated carbon to be treated obtained after solid-liquid separation is washed with water twice the volume of the activated carbon to be treated, and the pretreated activated carbon is obtain...

Embodiment 3

[0041] The specific surface area of ​​granular activated carbon new carbon in embodiment 3 is 647.3m 2 / g, which is mainly used for the treatment of waste gas in essence factories.

[0042] First, the regenerated solvent is obtained by mixing 1% potassium hydroxide; 95% isopropanol; 4% water, and heated to 80 degrees Celsius. The volume of the regenerated reagent and the volume of the saturated waste activated carbon are mixed according to the ratio of 3:1 and soaked for 60 minutes;

[0043] Secondly, the regeneration reagent is separated from the activated carbon solid-liquid, and the liquid part is re-distilled to collect the organic reagent, which can be recycled for the next regeneration; the separated solid is obtained to be treated activated carbon;

[0044] Again, the activated carbon to be treated obtained after the solid-liquid separation is washed with water 1.5 times the volume of the activated carbon to be treated, and the pretreated activated carbon is obtained by...

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Abstract

The invention relates to a method for regenerating activated carbon. The method is characterized in that the method comprises the steps of mixing a regeneration solvent having a solution temperature of 50-120 DEG C and waste activated carbon in a volume ratio of 3:1-1:3 and soaking for 10-60min; carrying out solid-liquid separation on the soaked mixture; washing the separated activated carbon to be treated with water in a volume ratio of the activated carbon to be treated to water of 1:2-1:5; and activating the washed pre-treated activated carbon with microwaves, wherein the regeneration solvent is composed of 1-10% of alkaline substance, 65-95% of organic solvent and 1-25% of water by mass percentage. The method can remove organic substances and inorganic substances adsorbed on the surface and in the micropores of the activated carbon to the maximum extent, the regenerates can be circularly utilized, the regeneration speed of the activated carbon and the quality of the regenerated carbon are improved, the regeneration cost of the activated carbon is reduced and the regeneration efficiency and the regeneration quality of the activated carbon are improved.

Description

technical field [0001] The invention belongs to the field of regeneration of adsorbed saturated waste activated carbon, and in particular relates to a regeneration method of activated carbon. Background technique [0002] Activated carbon has the characteristics of large specific surface area and strong adsorption capacity. As an adsorbent, activated carbon is widely used in industrial production, environmental protection and people's life, and is an indispensable and important adsorption material. [0003] The vast majority of activated carbon products are disposable. Due to the high cost of recycling, most of them are discarded after use, resulting in secondary pollution. Therefore, the regeneration of saturated waste activated carbon has extremely important engineering application value and economic value. [0004] Activated carbon regeneration is to restore the adsorption performance of saturated activated carbon through various methods, so as to achieve the purpose of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/34B01J20/20C02F1/28B01D53/02
CPCB01J20/345B01D53/02B01J20/20B01J20/3416B01J20/3441C02F1/283
Inventor 付善明吴其圣
Owner 广州微碳科技有限公司
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