Membrane distillation concentration method for hydrogen peroxide solution
A hydrogen peroxide solution, membrane distillation technology, applied in chemical instruments and methods, peroxide/peroxyhydrate/peroxyacid/superoxide/ozone, inorganic chemistry, etc., can solve the problem of large product loss , The equipment is large in size and the operating cost is high, so as to achieve the effect of simple process, avoiding high temperature decomposition and avoiding decomposition
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[0025] Example 1
[0026] The flat membrane distillation module is selected, and the realization form of membrane distillation is direct contact type. The device is as attached figure 1 , Using hydrophobic polyvinylidene fluoride microporous membrane. The raw material liquid is 20.05wt.% hydrogen peroxide solution, and the cold fluid is 0-3°C tap water.
[0027] Add 250ml of this hydrogen peroxide solution as a raw material liquid into the raw material tank 2, heat it to a constant temperature of about 30°C by the heat source 1, turn on the raw material pump 3, open the valve 5, and introduce cooled tap water on the permeate side of the membrane module 4. The constant temperature raw material liquid Driven into the raw material side of the membrane module 4 via the raw material pump 3. The raw material liquid flows through the flat membrane module at a flow rate of 20L / h, and the water and a small amount of hydrogen peroxide in it in the form of steam pass through the membrane por...
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[0029] Example 2
[0030] The flat membrane distillation module is selected, and the realization form of membrane distillation is air gap type. The device is as attached figure 2 , Using hydrophobic polytetrafluoroethylene microporous membrane. The raw material liquid is a 20.05 wt.% hydrogen peroxide solution, and the temperature of the cooling plate is obtained by cooling the ethylene glycol aqueous solution at -5 to -1°C.
[0031] Add 250ml of this hydrogen peroxide solution as a raw material liquid to the raw material tank 2, heat it to a constant temperature of about 40°C by the heat source 1, open the valve 5 and pass in the cooled glycol aqueous solution to lower the temperature of the cooling plate in the membrane module 4, open it The raw material pump 3, the constant temperature raw material liquid is pumped into the raw material side of the membrane module 4 through the raw material pump 3. The raw material liquid flows through the flat membrane module at a flow rate o...
Example Embodiment
[0033] Example 3
[0034] The flat-plate membrane distillation module is selected, and the realization form of membrane distillation is vacuum type. The device is as attached image 3 , Using hydrophobic polypropylene microporous membrane. The raw material liquid is a 29.95wt.% hydrogen peroxide solution, and the cooling liquid circulating in the condensation system is a ethylene glycol aqueous solution at -5 to -1°C.
[0035] Add 250ml of the hydrogen peroxide solution as the raw material liquid into the raw material tank 2, heat it to a constant temperature of about 50°C by the heat source 1, turn on the raw material pump 3, the condensing system 6, and the vacuum pump 9 successively. Component 4 raw material side. The raw material liquid flows through the flat membrane module at a flow rate of 20L / h, and the water and a small amount of hydrogen peroxide in it in the form of steam pass through the membrane pores to the permeate side under the action of the vapor pressure differe...
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