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Preparation method for cationic-type activated carbon

A cationic activated carbon technology, applied in chemical instruments and methods, other chemical processes, water/sludge/sewage treatment, etc., can solve problems such as cationic activated carbon that has not been found, and achieve good stability

Active Publication Date: 2015-05-13
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

No published reports on the preparation of cationic activated carbon have been found so far

Method used

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  • Preparation method for cationic-type activated carbon
  • Preparation method for cationic-type activated carbon

Examples

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Effect test

Embodiment 1

[0027] Embodiment 1, a kind of preparation method of positively charged cationic activated carbon comprises the following steps:

[0028] (1) Activated carbon pretreatment: wash 2g of activated carbon with water, dry at 80°C-100°C, crush to 100-200 mesh, and oxidize the activated carbon with 10mL of 36% hydrochloric acid for 10h to make more hydroxyl groups appear on the surface;

[0029] (2) Put the three-neck flask into the water bath, heat up to 85°C, add the activated carbon pretreated in step (1), then add 5mL epichlorohydrin, 5mL N-N dimethylformamide, and stir for 1h;

[0030] (3) Add 3mL of ethylenediamine, the reaction is violent during this process, so it is advisable to add slowly drop by drop. React for 1 hour; continue to add 5 mL of triethylamine, and react for 30 minutes.

[0031] (4) After the reaction, cool to room temperature, wash, and dry at 70°C to obtain a cationic activated carbon product.

[0032] The scanning electron microscope picture of the cation...

Embodiment 2

[0034] As described in Example 1, the difference is: 40% sulfuric acid was used to oxidize the activated carbon for 10 h during the pretreatment of the activated carbon, so that more hydroxyl groups appeared on the surface.

Embodiment 3

[0035] Embodiment 3, a kind of preparation method of cationic activated carbon comprises the following steps:

[0036] (1) Activated carbon pretreatment

[0037] Wash 6g of activated carbon with water, dry at 80°C-100°C, crush to 100-200 mesh, impregnate with 30mL of 36.5% concentrated hydrochloric acid, and treat for 9h;

[0038] (2) Add the activated carbon pretreated in step (1) into the reaction vessel, raise the temperature to 86°C in a water bath, then add 15mL of epichlorohydrin and 16mL of N-N dimethylformamide, and stir for 1.2h;

[0039] (3) Then add ethylenediamine 10mL dropwise and react for 1.2h; continue to add triethylamine 15mL dropwise and react for 40 minutes.

[0040] (4) After the reaction, cool to room temperature, wash, and dry at 70-75°C to obtain a cationic activated carbon product.

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Abstract

The invention relates to a preparation method for cationic-type activated carbon. The preparation method comprises the steps of washing, drying and crushing activated carbon, and oxidizing the activated carbon by concentrated hydrochloric acid or sulfuric acid so that the surface of the activated carbon has hydroxy; heating to the temperature of 80-87 DEG C under the condition of water bath, then adding epoxy chloropropane and N-N dimethylformamide, and stirring and reacting for 0.5-1.5h; and adding ethanediamine to react for 1-1.5h, then continuously dripping triethylamine to react for 0.5-1h, cooling to room temperature, and washing and drying so as to obtain the cationic-type activated carbon. An activated carbon product is the cationic-type activated carbon with positive charges, has a cationic group and a hydroxyl group, further has biodegradability, and is applicable to removing anionic-type pollutants in water.

Description

technical field [0001] The invention relates to a method for preparing cationic activated carbon, in particular to a method for grafting and modifying activated carbon with organic substances such as ammonium salts to prepare activated carbon with a positive charge on the surface, which belongs to the technical field of preparing adsorption materials. Background technique [0002] Activated carbon is a broad-spectrum adsorbent material that plays an important role in water treatment. With the advancement of science and technology and the development of industry and agriculture, the problem of environmental pollution is becoming more and more serious, among which water pollution is the most prominent. In view of the complexity of pollutants in water bodies, the application field has put forward higher requirements for activated carbon, and more and more researchers are committed to preparing activated carbon with specific adsorption functions. The adsorption properties of ac...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/22B01J20/30C02F1/28C02F1/58
Inventor 岳钦艳孙媛媛高悦许醒高宝玉黄理辉
Owner SHANDONG UNIV
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