Preparation method of chitosan binder for formed activated carbon

A technology for forming activated carbon and chitosan, applied in the direction of chitin adhesive, hyaluronic acid adhesive, etc., can solve the problems of dust pollution, reduced treatment efficiency, large resistance, etc., and achieves good water resistance, convenient operation, simple craftsmanship

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

AI Technical Summary

Problems solved by technology

The activated carbon products currently used are mainly powdered activated carbons, but powdered activated carbons are not easy to store, easily cause dust pollution, and may accumulate when used as water treatment materials, resulting in excessive resistance and reduced treatment efficiency

Method used

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  • Preparation method of chitosan binder for formed activated carbon
  • Preparation method of chitosan binder for formed activated carbon

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preparation example Construction

[0025] A preparation method for chitosan binder for shaped activated carbon, comprising the following steps:

[0026] Step 1) Add water to configure an acid solution with a certain concentration, weigh an appropriate amount of chitosan and dissolve it in the acid solution;

[0027] Step 2) adding the cross-linking agent into the chitosan solution under stirring, and controlling the mass ratio of chitosan and cross-linking agent;

[0028] Step 3) Add an appropriate amount of activated carbon to the reaction system to control the ratio of binder and activated carbon;

[0029] Step 4) Control the temperature of the reaction system at 20-60°C, cross-link the mixed solution for 1-2 hours under stirring, place it in the air for 2 hours, and remove the foam;

[0030] Step 5) Put the reaction solution in an oven at 100-120° C. for 15-30 minutes, and finally pour the reaction solution into a mold and dry it.

[0031] Further, the acid is mainly citric acid.

[0032] Further, the cro...

Embodiment 1

[0035] Preparation of chitosan-citric acid thermal crosslinking binder:

[0036] Chitosan-citric acid binder composite activated carbon samples were prepared under heating. Get 1g of chitosan, add it to 50ml of 7% by weight aqueous solution of citric acid, stir until dissolved. Stir and add a certain amount of activated carbon, control the gel / carbon ratio to 1:1, 2:1, put the solution in a drying oven at 120°C, and take it out after half an hour. The product was transferred to a mold and placed in air to dry at room temperature. Chitosan and citric acid in the activated carbon mixture can be cross-linked by reacting at 100-120 °C for half an hour. The prepared composite activated carbon samples were subjected to long-term immersion experiments in water, 3wt% HCl aqueous solution, and 10wt% NaOH aqueous solution. Studies have found that the chitosan-citric acid binder system has no swelling in water, acid, and alkali solutions, can maintain the original particle shape, and c...

Embodiment 2

[0040] Implementation of chitosan-citric acid-glutaraldehyde binder:

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Abstract

The invention relates to the field of functional materials, especially to a preparation method of a chitosan binder for formed activated carbon. The preparation method of the chitosan binder for formed activated carbon comprises the following steps: adding water to prepare aqueous acid, and weighing chitosan and dissolving chitosan in the aqueous acid to obtain a chitosan solution; stirring while adding a cross-linking agent into the chitosan solution; adding a proper amount of activated carbon into a reaction system; controlling temperature of the reaction system to 20-60 DGE C, and carrying out a cross-linking reaction on the mixed liquor for 1-2h under the condition of stirring, standing in the air for 2h and defoaming; and placing a reaction liquid obtained into a baking oven of 100-120 DEG C for 15-30 min, pouring the reaction liquid into a mold and drying. The technology is simple and convenient to operate. The binder is a hydrophilic binder. To some extent, water resistance, acid and alkali resistance and hydrophilic advantage performance are maintained in the prepared formed activated carbon.

Description

technical field [0001] The invention relates to the field of functional materials, in particular to a preparation method of a chitosan binder for shaped activated carbon. Background technique [0002] Activated carbon has a well-developed pore structure and a huge specific surface area, so it has a very strong adsorption capacity for various substances. Activated carbon is widely used and has been used in environmental protection, gas phase adsorption, liquid phase adsorption, medicine, food, chemical industry, agriculture and many other aspects. The activated carbon products currently used are mainly powdered activated carbons, but powdered activated carbons are not easy to store, easily cause dust pollution, and may accumulate when used as water treatment materials, resulting in excessive resistance and reduced treatment efficiency. Compared with powdered activated carbon, shaped activated carbon has larger size and certain shape, higher bulk density and strength, and no ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J105/08C08J3/24
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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