Preparation method of hydrophobic activated carbon
An activated carbon and hydrophobic technology, which is applied in the field of preparation of hydrophobic activated carbon, can solve the problems of affecting adsorption performance, pore collapse, and specific surface area decrease, so as to achieve the effect of enriching pore structure and avoiding pore collapse
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Embodiment 1
[0025] The preparation method of the hydrophobic activated carbon of the present embodiment includes the steps of:
[0026] 1) Take 1 part of the mass parts of 40% water glass, and 3 parts of deionized water is added to give a mixture A;
[0027] 2) After the mixing liquid A in step 1) is slowly heated to boiling, after cooling to room temperature, aging 12h, taking the upper layer to filter, resulting in mixed liquid B;
[0028] 3) Take the activated carbon into the tube furnace, under nitrogen protection, heat treatment at 800 ° C to obtain solid C;
[0029] 4) Press the mass ratio C: B = 1: 30, add C to B, stir well, and mix the system D;
[0030] 5) Place the mixing system D into the vacuum oven, and take out after vacuuming for 2 hours;
[0031] 6) When the vacuum-treated mixing system D is stirred at room temperature for 10 h, then extract and rinse 3 times, and solid E;
[0032] 7) Re-adding the solid E to the same volume of deionized water in the same volume of the system ...
Embodiment 2
[0036] 1) Take 1 part of the mass parts of 40% water glass, and 3 parts of deionized water is added to give a mixture A;
[0037] 2) After the mixed liquid A in step 1) is slowly heated to boiling, after cooling to room temperature, aging 18h, taking the upper layer to filter, resulting in mixed liquid B;
[0038] 3) Take the activated carbon into the tube furnace, under nitrogen protection, heat treatment at 800 ° C to obtain solid C;
[0039] 4) Press the mass ratio C: B = 1: 60, add C to B, stir well, and the mixing system D;
[0040] 5) Place the mixing system D into the vacuum oven, and take out after vacuum treatment for 4 hours;
[0041] 6) After stirring the vacuum-treated mixing system D at room temperature for 18 h, filter and rinse 4 times, and solid E;
[0042] 7) Re-adding the solid E to the same volume of deionized water in the same volume of the system D, and the sulfuric acid is added dropwise to the system pH = 7 at a rate of 6 drops / min at 40 ° C. After stoppin...
Embodiment 3
[0046] 1) Take 1 part of the mass parts of 40% water glass, and 3 parts of deionized water is added to give a mixture A;
[0047] 2) After the mixed liquid A in step 1) is slowly heated to boiling, after cooling to room temperature, agitate 24 h, take the upper layer to filter, to obtain a mixed liquid B;
[0048] 3) Take the activated carbon into the tube furnace, under nitrogen protection, heat treatment at 800 ° C to obtain solid C;
[0049] 4) Press the mass ratio C: B = 1: 100, add C to B, stir well, and the mixing system D;
[0050] 5) Place the mixing system D into the vacuum oven, and take out after vacuum treatment for 6 hours;
[0051] 6) After the magnetic force treated mixture D at room temperature is stirred at room temperature for 24 h, filter and rinse 6 times, and solid E;
[0052] 7) Re-adding the solid E to the same volume of deionized water in the same volume of the system D, and the sulfuric acid is dripped to the system pH = 7 at 60 ° C. After stopping stirrin...
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