Preparation method of hydrophilic porous formed activated carbon

An activated carbon and pore forming technology, which is applied in the field of functional materials, can solve the problems of poor hydrophilicity, water resistance and stability, limited performance and application range, and achieve cost-effective advantages, convenient operation, and high economic value.

Active Publication Date: 2015-07-22
QUFU TIANBO CRYSTALLIZED CARBON TECH CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] When the activated carbon is usually formulated with an organic binder, because polyvinyl alcohol and carboxymethyl cellulose contain a large number of hydroxyl groups, they have strong hydrophilicity, poor water resistance and stability, which limits its performance. and scope of application

Method used

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  • Preparation method of hydrophilic porous formed activated carbon
  • Preparation method of hydrophilic porous formed activated carbon
  • Preparation method of hydrophilic porous formed activated carbon

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preparation example Construction

[0025] A preparation method of hydrophilic porous shaped activated carbon, comprising the following steps:

[0026] Step 1) According to the difference of water-soluble hydroxyl polymers, prepare an aqueous solution with an appropriate concentration: weigh a certain amount of water-soluble hydroxyl-containing polymers, dissolve them in an appropriate amount of distilled water to swell and dissolve, and wait for cooling before use.

[0027] Step 2) Add 2wt% NaOH aqueous solution to alkalize for half an hour, and add an appropriate amount of activated carbon to the glue system to control the glue / charcoal ratio.

[0028] Step 3) adding an appropriate amount of cross-linking agent epichlorohydrin to control the mass ratio of polymer to epichlorohydrin.

[0029] Step 4) Add foaming agent ammonium bicarbonate accounting for 0.1%-0.3% of the total weight of the system, and stir evenly.

[0030] Step 5) Stir the reaction for 1-2 hours under a constant temperature water bath at 65°C....

Embodiment 1

[0034] Implementation of Polyvinyl Alcohol-Epichlorohydrin Bonded Activated Carbon

[0035] Accurately weigh 2g of polyvinyl alcohol, dissolve in 23g of distilled water, and swell and dissolve in an oven at 93°C. Add 5ml of 2wt% NaOH aqueous solution to alkalize for half an hour. Add an appropriate amount of powdered activated carbon to the glue system to make the glue / charcoal ratio 1:1. Added 0.133g, 0.2g, 0.25g, 0.4g, 0.67g of epichlorohydrin respectively, so that the mass ratio of polyvinyl alcohol to epichlorohydrin was 15:1, 10:1, 8:1, 5:1, 3:1, the numbers are Ⅰ-1, Ⅰ-2, Ⅰ-3, Ⅰ-4, Ⅰ-5. Put it in a constant temperature water bath at 65° C., stir and heat for 1 hour, then stop stirring, and place it under the constant temperature water bath at this temperature for 45 minutes. After the reaction, neutralize to neutral with acetic acid. Pour the mixture into molds and dry them in an oven at 110°C. After it is completely dried and solidified, it is soaked in water, 3wt% ...

Embodiment 2

[0042] Implementation of Carboxymethyl Cellulose-Epichlorohydrin Bonded Activated Carbon

[0043]Accurately weigh 2g of carboxymethylcellulose, dissolve in 23g of distilled water, swell and dissolve under stirring. Add 5ml of 2wt% NaOH solution to alkalize for half an hour. Add an appropriate amount of powdered activated carbon to the glue system to make the glue / charcoal ratio 2:1, 1:1, and the numbers indicate Ⅱ-1, Ⅱ-2. Add 0.4g and 0.67g of epichlorohydrin respectively, so that the mass ratio of carboxymethyl cellulose and epichlorohydrin is 5:1 and 3:1, and the numbers are respectively II-1-1 and II-1-2 , II-2-1, II-2-2. Put it in a constant temperature water bath at 65° C., stir and heat for 1 hour, then stop stirring, and place it under the constant temperature water bath at this temperature for 45 minutes. After the reaction, neutralize the pH to neutral with acetic acid. Pour the mixture into molds and dry them in an oven at 110°C. After it is completely dried and...

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Abstract

The invention relates to the field of functional materials, and especially relates to a preparation method of hydrophilic porous formed activated carbon. The preparation method of the hydrophilic porous formed activated carbon comprises the following steps: preparing a proper concentration of an aqueous solution of a water-soluble hydroxy polymer; weighing a certain amount of the water-soluble hydroxy polymer, dissolving the certain amount of the water-soluble hydroxy polymer in distilled water, swelling and dissolving, and cooling; adding 2wt% of an aqueous solution of NaOH to alkalize, and adding a proper amount of activated carbon into the above obtained glue system; adding a proper amount of a cross-linking agent chloropropylene oxide, and controlling a mass ratio of the water-soluble hydroxy polymer to chloropropylene oxide; adding a foaming agent ammonium bicarbonate, and uniformly stirring; reacting under stirring in a warm water bath, and neutralizing after the reaction to make the pH be 7; and pouring the above obtained activated carbon mixed solution into a die, and drying in a 110DEG C oven. The preparation method has the advantages of simple process and convenient operation, and the formed activated carbon obtained in the invention has the advantages of water resistance, acid and alkali resistance, and high cost performance.

Description

technical field [0001] The invention relates to the field of functional materials, in particular to a method for preparing hydrophilic porous shaped activated carbon. Background technique [0002] Activated carbon is obtained from raw materials such as coal, wood and fruit shells through carbonization, activation and post-treatment. According to the appearance and shape, it can be divided into powdery activated carbon, granular activated carbon, fiber activated carbon and spherical activated carbon. As an important functional material, activated carbon not only has a unique pore structure, but more importantly, its surface contains a variety of active functional groups, which are generally divided into oxygen-containing functional groups and nitrogen-containing functional groups. The chemical properties of activated carbon are very stable, insoluble in water and organic solvents, and can be regenerated and reused after use. Therefore, activated carbon can be widely used in w...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L29/04C08L1/26C08L3/02C08J3/24C08K3/04C08J9/08C04B26/04C04B26/28
Inventor 冯芳赵斌元周洁甘琦赖奕坚胡筱君杜翠玲
Owner QUFU TIANBO CRYSTALLIZED CARBON TECH CO LTD
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