Preparation method of nano copper-manganese oxide coated silica formaldehyde purifying agent
A technology of manganese oxide and silicon dioxide, which is applied in the field of preparation of nano-copper manganese oxide-coated silicon dioxide formaldehyde purifier, can solve problems such as poor adsorption and treatment effects, and achieve improved adsorption and catalytic efficiency, high Effect of specific surface area and macropore volume
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[0012] The invention provides a method for preparing a nano-copper-manganese oxide-coated silicon dioxide formaldehyde scavenger, comprising the following steps:
[0013] Heat up the bottom water and add 0.1-1wt% cationic surfactant to the bottom water, then add copper-manganese mixed solution and water glass solution at a volume ratio of 1-3:2-3 and stir evenly to obtain a reaction solution, then add dilute sulfuric acid solution to adjust the reaction solution The pH is 3-5 to obtain a gel-like reaction solution, then add ammonia water and sodium hydroxide mixed solution to adjust the pH of the reaction solution to 8.0-9.5, continue to heat up to 80 ° C for 1-2 hours, and then add dilute sulfuric acid to acidify until the pH is 3-5 obtain reaction slurry;
[0014] Wherein the concentration of copper sulfate in the copper-manganese mixed solution is 1-6.67wt%, the concentration of manganese sulfate is 1-6.67wt%, and the SiO in the water glass solution 2 The content is 15-25w...
Embodiment 1
[0029] at 10m 3 Add 3m into the volume-sized enamel reaction kettle 3 water, turn on the stirring equipment, first add 50kg solid copper sulfate, then add 50kg solid manganese sulfate, stir for 30min, and prepare a copper-manganese solution. The selected high-quality food-grade solid water glass has a modulus of 2.5, put the solid water glass into the steaming ball of the roller, pass the steam through the precision filter, pressurize to 0.6MPa, keep the pressure for 2 hours to get the concentrated water glass and then add water to prepare SiO 2 Content is the water glass solution of 25.0wt%, store for future use.
[0030] In another volume of 10m 3 In the enamel reaction kettle, add 3m 3 The bottom water is heated to 50°C by steaming, adding 3kg of triethanolamine, and then adding 2m 3 Prepared copper-manganese solution and 2m 3 The water glass solution is stirred evenly to obtain the reaction solution, and 25wt% dilute sulfuric acid solution is added to it and the reac...
Embodiment 2
[0032] at 10m 3 Add 4m into the volume-sized enamel reaction kettle 3 water, turn on the stirring equipment, first add 100kg solid copper sulfate, then add 100kg solid manganese sulfate, stir for 30min, and prepare a copper-manganese solution. Select high-quality food-grade solid water glass with a modulus of 3.5, put the solid water glass into the roller steaming ball, pass the steam through the precision filter, pressurize to 0.6MPa, keep the pressure for 2 hours to get concentrated water glass and then add water to prepare SiO 2 Content is the water glass solution of 22.0wt%, store for future use.
[0033] In another volume of 10m 3 In the enamel reaction kettle, add 2m 3 The bottom water was heated to 50°C with steam, 5kg of imidazoline was added, and 2m 3 Prepared copper-manganese solution and 3m 3 The water glass solution is stirred evenly to obtain the reaction solution, and 20wt% dilute sulfuric acid solution is added to it and the reaction solution is stirred to...
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