Preparation and application of composite microsphere used for coagulation adsorption and adsorbent thereof
A technology of composite microspheres and adsorbents, which is applied in the field of water treatment, can solve problems such as raising river beds, and achieve the effects of improving efficiency, high degree of dispersion, and high adsorption activity
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[0019] Example 1
[0020] A preparation method of composite microspheres for coagulation and adsorption, comprising the following steps: adding 4 kg of sulfuric acid solution with a concentration of 14.2 wt % into 40 kg of a sodium aluminate solution with a concentration of 1.9 mol / L, and stirring at room temperature until the pH value of the solution is 8 -8.8, filter, wash the precipitate, add 0.2kg polyvinyl alcohol, 60kg concentration of 24wt% ethanol solution and stir for 8min, the stirring temperature is 145 ℃, add 0.2kg ammonium bromide, 0.4kg cetyltrimethyl chloride The ammonium is mixed evenly, and the composite microspheres for coagulation and adsorption are spray-dried at 140°C.
[0021] A method for preparing a coagulation adsorbent, comprising the following steps:
[0022] S1, 12kg ferrous sulfate heptahydrate, 8kg average inner diameter are 3mm polyvinyl chloride polyhedral hollow spheres are mixed uniformly, heated to ferrous sulfate heptahydrate hydrolysis, ad...
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[0024] Example 2
[0025] A preparation method of composite microspheres for coagulation and adsorption, comprising the following steps: adding 12 kg of a sulfuric acid solution with a concentration of 10.5 wt % into 60 kg of a sodium aluminate solution with a concentration of 1.4 mol / L, and stirring at room temperature until the pH value of the solution is 8 -8.8, filter, wash the precipitate, add 1kg polyvinyl alcohol, 40kg concentration of 35wt% ethanol solution and stir for 2min, the stirring temperature is 164 ℃, add 0.1kg ammonium bromide, 1kg cetyltrimethylammonium chloride and mix Uniform, spray-dried composite microspheres for coagulation and adsorption at 120°C.
[0026] A method for preparing a coagulation adsorbent, comprising the following steps:
[0027] S1, 20kg ferrous sulfate heptahydrate, 2kg average inner diameter are 3mm polyvinyl chloride polyhedral hollow spheres are mixed uniformly, heated to ferrous sulfate heptahydrate hydrolysis, add 70kg deionized w...
Example Embodiment
[0029] Example 3
[0030] A preparation method of composite microspheres for coagulation and adsorption, comprising the following steps: adding 6 kg of sulfuric acid solution with a concentration of 13 wt% into 45 kg of a sodium aluminate solution with a concentration of 1.7 mol / L, and stirring at room temperature until the pH value of the solution is 8- 8.8, filter, wash the precipitate, add 0.4kg polyvinyl alcohol, 55kg concentration of 26wt% ethanol solution and stir for 6min, stirring temperature is 150 ℃, add 0.18kg ammonium bromide, 0.6kg cetyltrimethyl ammonium chloride Mix evenly, spray-dry the composite microspheres for coagulation and adsorption at 135°C.
[0031] A method for preparing a coagulation adsorbent, comprising the following steps:
[0032] S1, 14kg of ferrous sulfate heptahydrate and 6kg of average inner diameter are 3mm polyvinyl chloride polyhedral hollow spheres and evenly mixed, heated to ferrous sulfate heptahydrate to be hydrolyzed, add 50kg of dei...
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