Hydrophobic activated carbon material and preparation method and application thereof
A technology of activated carbon and hydrophobic modification, which is applied in the direction of chemical instruments and methods, water pollutants, and other chemical processes, and can solve the problems of less research on hydrophobic modification of waste activated carbon, reduced cycle life of activated carbon, and reduced specific surface area of activated carbon. , to achieve the effects of mild preparation conditions, inhibition of adsorption, and improvement of hydrophobic properties
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[0023] In an embodiment of the present invention, a method for preparing a hydrophobic activated carbon material is proposed, comprising the steps of:
[0024] Step 1: hydrolyzing the silicate to obtain a silicic acid gel;
[0025] In an embodiment of the present invention, the silicate includes one or more of tetramethyl silicate, tetraethyl silicate, isopropyl silicate, orthobutyl silicate;
[0026] In a preferred embodiment of the present invention, the silicate adopts tetramethyl silicate;
[0027] Wherein, the volume concentration of the silicate for the hydrolysis reaction is 5% to 20%;
[0028] Wherein, the specific conditions for the hydrolysis reaction of the silicate are as follows: use the silicate and water as raw materials, add a hydrolysis solvent and a hydrolysis catalyst, the pH is acidic, and stir at room temperature for 6 hours to 12 hours;
[0029] Optionally, the hydrolysis solvent is one or more of ether, ethanol, toluene, and n-hexane;
[0030] Optiona...
Embodiment 1
[0059] A method for preparing a hydrophobic activated carbon material. The preparation method uses tetramethyl silicate as an additive and a mixed solution of toluene+acyl chloride as a modifier to hydrophobically modify waste activated carbon. After liquid phase impregnation, chemical grafting, and suction filtration , and drying to obtain a hydrophobic activated carbon material. The specific implementation steps are as follows:
[0060] 1) Mix 5ml tetramethyl silicate, 20ml H 2 Add O and 50ml ether into a large beaker, stir magnetically at room temperature for 0.5-2h, add 6ml acetic acid to the beaker to promote the hydrolysis of tetramethyl silicate, stir magnetically at room temperature for 6-12h;
[0061] 2) After reacting for 3 hours, adjust the pH to neutral with ammonia water, add 10 g of waste activated carbon at the same time, and stir magnetically for 4 to 12 hours;
[0062] 3) After the reaction, soak the sample in 70-100ml toluene solution for 3-5 hours, filter ...
Embodiment 2
[0068] A method for preparing a hydrophobic activated carbon material. The preparation method uses a mixed solution of diethyl ether + stearyl chloride as a modifier to hydrophobically modify waste activated carbon, and then obtains a hydrophobic activated carbon material through liquid phase impregnation, chemical grafting, suction filtration, and drying. . The specific implementation steps are as follows:
[0069] 1) Mix 5ml tetramethyl silicate, 20ml H 2 Add O and 50ml ether into a large beaker, stir magnetically at room temperature for 0.5-2h, add 6ml acetic acid to the beaker to promote the hydrolysis of tetramethyl silicate, stir magnetically at room temperature for 9h;
[0070] 2) After reacting for 3 hours, adjust the pH to neutral with ammonia water, add 10 g of waste activated carbon at the same time, stir magnetically for 8 hours, and then filter with suction;
[0071] 3) Place the sample in a mixture of 65ml of anhydrous ethylene glycol solution and 5ml of trieth...
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