A kind of ceramic separation membrane element and preparation method thereof
A ceramic separation membrane and separation membrane technology, applied in semipermeable membrane separation, chemical instruments and methods, membrane technology, etc., can solve the problems of difficult cleaning, low concentration of materials, and slender separation membrane channels, etc., to save raw materials , The preparation method is simple and easy, and the effect of reducing the bulk density of the equipment
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specific Embodiment 1
[0093] To prepare a multi-channel ceramic separation membrane element using alumina as a raw material, the steps are as follows:
[0094] 1. Mix 4 kg of alumina powder with a median particle size of 8 μm and 1 kg of alumina powder with a median particle size of 1 μm;
[0095] 2. Add 300g of methyl cellulose, 150g of glycerin, 150g of oleic acid, 150g of vacuum mineral oil and 900g of water, and go through the steps of mixing, mud refining, aging, etc. to obtain plastic mud;
[0096] 3. Use an extruder to extrude the mud into a thin-walled multi-channel green body with a circular cross-section;
[0097] 4. The green body is dried by microwave radiation;
[0098] 5. The dried green body is heated up to 400°C at a speed of 2°C / min and kept for 1 hour, and then heated to 1400°C at a speed of 2°C / min for 2 hours, and then cooled with the furnace.
[0099] get as figure 2 The shown multi-channel ceramic separation membrane has an outer diameter of 50mm and a thin wall thickness ...
specific Embodiment 2
[0100] The steps to prepare a multi-channel ceramic separation membrane element using silicon carbide as a raw material are as follows:
[0101] 1. Mix 4.5 kg of black silicon carbide powder with a median particle size of 12 μm, 0.3 kg of kaolin with a median particle size of 0.5 μm, and 0.2 kg of alumina powder with a median particle size of 0.5 μm;
[0102] 2. Add 300g of hydroxypropyl methylcellulose, 120g of glycerin, 150g of oleic acid, 120g of vacuum mineral oil and 850g of water, and go through the steps of mixing, mud refining, aging, etc. to obtain plastic mud;
[0103] 3. Use an extruder to extrude the mud into a rectangular multi-channel green body;
[0104] 4. After drying the green body at room temperature for 24 hours, put it in an oven at 80°C for 8 hours;
[0105] 5. The dried green body is heated to 400°C at a speed of 2°C / min and kept for 1 hour, and then heated to 1350°C at a speed of 2°C / min and held for 2 hours, and then cooled with the furnace.
[0106]...
specific Embodiment 3
[0107] To prepare a multi-channel ceramic separation membrane element using alumina as a raw material, the steps are as follows:
[0108] 1. Mix 4.9 kg of alumina powder with a median particle size of 14 μm and 0.1 kg of titanium dioxide powder with a median particle size of 0.2 μm;
[0109]2. Add 250g polyoxymethylene resin, 50g polyethylene, 150g paraffin, 200g stearic acid, knead at 160-170°C, extrude and granulate;
[0110] 3. Extrude the pellets with a twin-screw extruder at 165°C to form a thin-walled multi-channel blank with a circular cross-section;
[0111] 4. Degrease the green body with oxalic acid at 150°C for 6 hours in a chemical catalytic degreasing furnace;
[0112] 5. Transfer the degreased body to an electric furnace, raise the temperature to 400°C at a rate of 2°C / min and keep it for 1 hour, then raise the temperature to 1400°C at a rate of 2°C / min and hold it for 2 hours, then cool with the furnace.
[0113] get as figure 2 The shown multi-channel ceram...
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