A kind of desiccant and preparation method thereof
A technology of dehumidifier and cross-linking agent, applied in the field of dehumidifier and its preparation, can solve the problems of high price of water-absorbing resin, low cost performance of household air dehumidifier, etc., and achieve the effect of high-efficiency adsorption
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Embodiment 1
[0025] A kind of preparation method of desiccant comprises the steps:
[0026] S1. Crush the rice husk to 80 mesh, mix it with 60% phosphoric acid solution at an impregnation ratio of 5:1 (i.e. the mass ratio of phosphoric acid solution to biomass raw material), calcinate the mixture in a calciner at 500°C for 1 hour, and wash it with water at 60°C , dried to obtain rice husk activated carbon;
[0027] S2. By weight percentage, 50% rice husk activated carbon, 25% calcium chloride, 12% acrylamide, 8% acrylic acid, 1% deodorant and 1% preservative are dissolved in water to obtain a mixed solution, and 1% N,N'-methylenebisacrylamide and 2% ammonium persulfate were added to the mixed solution, and reacted at 50°C for 4 hours in the presence of inert gas to obtain a composite gel;
[0028] S3. The composite gel was frozen at -20°C for 12 hours, thawed at 20°C for 8 hours, repeated three times, and then dried at 70°C to obtain a desiccant.
[0029] The specific surface area and po...
Embodiment 2
[0031] A kind of preparation method of desiccant comprises the steps:
[0032] S1. Crush the wheat straw to 80 mesh, mix it with 50% phosphoric acid solution according to the impregnation ratio of 6:1 (that is, the mass ratio of phosphoric acid solution and biomass raw material), and calcinate the mixed solution in a calciner at 400°C for 2h, and wash it with water at 70°C , dried to obtain wheat straw activated carbon;
[0033] S2. By weight percentage, 40% wheat straw activated carbon, 30% calcium chloride, 15% acrylamide, 10% acrylic acid, 1% deodorant and 1% preservative are dissolved in water to obtain a mixed solution, and 1% N,N'-methylenebisacrylamide and 2% ammonium persulfate were added to the mixed solution, and reacted at 50°C for 4 hours in the presence of inert gas to obtain a composite gel;
[0034] S3. The composite gel was frozen at -20°C for 12 hours, thawed at 20°C for 8 hours, repeated three times, and then dried at 60°C to obtain a desiccant.
Embodiment 3
[0036] A kind of preparation method of desiccant comprises the steps:
[0037] S1. Crush the wheat straw to 80 mesh, mix it with 80% phosphoric acid solution according to the impregnation ratio of 4:1 (that is, the mass ratio of phosphoric acid solution and biomass raw material), and calcinate the mixed solution in a calciner at 600°C for 1 hour, and wash it with water at 80°C , dried to obtain wheat straw activated carbon;
[0038] S2. By weight percentage, 60% wheat straw activated carbon, 20% calcium chloride, 10% acrylamide, 5% acrylic acid, 1% deodorant and 1% preservative are dissolved in water to obtain a mixed solution, and 1% N,N'-methylenebisacrylamide and 2% ammonium persulfate were added to the mixed solution, and reacted at 50°C for 4 hours in the presence of inert gas to obtain a composite gel;
[0039] S3. The composite gel was frozen at -20°C for 12 hours, thawed at 20°C for 8 hours, repeated three times, and then dried at 60°C to obtain a desiccant.
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