Spongy bentonite-based composite adsorbing material and preparation method thereof
A composite adsorption material and a technology of bentonite are applied in the field of sponge-like bentonite-based composite adsorption materials and their preparation, which can solve the problems of low adsorption rate, low pore connectivity, small pores, etc., and achieve improved performance, adsorption capacity and adsorption. Effects of velocity, enlarged pore size, and degree of connectivity
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Embodiment 1
[0016] Take 70wt% of natural bentonite, then add 30wt% of thermoplastic polymer polyethylene, and stir for 30 minutes. Then add the mixed sample into the feeding funnel of the twin-screw plastic extruder, and wait until each section of the twin-screw plastic extruder reaches the set conveying section 190°C, the plasticizing section 200°C, and the melting section 210°C. Compress the heating temperature of 220°C in the extrusion section, start the main engine to extrude, and obtain a thin strip product, which directly enters the water tank for cooling and cutting, and finally obtains a short columnar adsorbent.
[0017] Soak the short columnar adsorbent in 25°C water for 10 minutes, take it out and put it into the puffing equipment, cover the sealing cover, heat and rotate the puffing tank to make it heat up rapidly, when the pressure in the tank reaches 0.5MPa, stop Heating and opening the machine cover to obtain the sponge-like bentonite-based composite adsorption material.
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Embodiment 2
[0020] Take 70wt% of natural bentonite, then add 30wt% of thermoplastic polymer polyethylene, and stir for 30 minutes. Then put the mixed sample into the feeding hopper of the twin-screw plastic extruder, and wait until each section of the twin-screw plastic extruder reaches the set heating temperature, that is, the conveying section is 190°C, the plasticizing section is 200°C, and melted Section 210 ° C, compression extrusion section 220 ° C, start the main engine to extrude, and obtain a thin strip product, which directly enters the water tank for cooling and cutting, and finally obtains a short columnar adsorbent.
[0021] Soak the short columnar adsorbent in 25°C water for 12 minutes, take it out and put it into the puffing equipment, cover the sealing cover, heat and rotate the puffing tank to make it heat up rapidly, when the pressure inside the tank reaches 0.8MPa, stop Heating and opening the machine cover to obtain the sponge-like bentonite-based composite adsorption ...
Embodiment 3
[0024] Take 60wt% of natural bentonite, add 10wt% of auxiliary selective adsorption raw materials, stir for 15 minutes, add 25wt% of thermoplastic polymer polypropylene and 5wt% of polyethylene, and stir for 15 minutes. Then put the mixed sample into the feeding hopper of the twin-screw plastic extruder, and wait until each section of the twin-screw plastic extruder reaches the set heating temperature, that is, the conveying section is 190°C, the plasticizing section is 200°C, and melted Section 210°C, compression extrusion section 220°C, start the main engine to extrude to obtain a thin strip product, put the obtained thin strip product in a water tank to cool, cut, and finally obtain a short columnar adsorbent.
[0025] Soak the short columnar adsorbent in water at 25°C for 16 minutes, take it out and put it into the puffing equipment, cover the sealing cover, heat and rotate the puffing tank to make it heat up rapidly, when the pressure in the tank reaches 1MPa, stop adding ...
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