A kind of dimercaptopropanol modified clay mineral material and its preparation method and application
A technology of dimercaptopropanol and clay minerals, which is applied to chemical instruments and methods, water pollutants, and other chemical processes, can solve problems such as unsatisfactory heavy metal adsorption effects and environmental hazards, and achieve effective utilization, low cost, and Apply promising effects
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Embodiment 1
[0036] A kind of dimercaptopropanol modified clay mineral material adopts dimercaptopropanol to modify vermiculite, and the specific steps are as follows:
[0037] (1) Weigh 5 g of vermiculite that has been ground and passed through a 200-mesh sieve and added to 100 mL of absolute ethanol to make a suspension with a concentration of 5%, and the suspension is ultrasonically treated at 60 ° C for 10 min;
[0038] (2) press n 二巯基丙醇 :m 蛭石 =2.565mmol / g ratio Add 12.825mmol dimercaptopropanol to the suspension, then adjust the pH of the suspension to 1 with 0.1mol / L HCl and NaOH, and reflux at 80°C for 20h to obtain a modified product solution ;
[0039] (3) Place the obtained modified product solution in a centrifuge and centrifuge at 4000rpm for 5min to remove the supernatant, then wash the obtained precipitate with absolute ethanol for 6 times to make the pH value close to 7, and then vacuum-dry it at 60°C for 24h , and ground through a 200-mesh sieve to obtain the dimercaptop...
Embodiment 2
[0044] A kind of dimercaptopropanol modified clay mineral material adopts dimercaptopropanol to modify vermiculite, and the specific steps are as follows:
[0045] (1) Weigh 5 g of vermiculite that has been ground and passed through a 200-mesh sieve and added to 100 mL of absolute ethanol to make a suspension with a concentration of 5%, and the suspension is ultrasonically treated at 55 ° C for 10 min;
[0046] (2) press n 二巯基丙醇 :m 蛭石= 2.565mmol / g ratio Add 12.825mmol dimercaptopropanol to the suspension, then adjust the pH of the suspension to 4 with 0.1mol / L HCl and NaOH, and reflux at 90°C for 20h to obtain a modified product solution ;
[0047] (3) Place the obtained modified product solution in a centrifuge and centrifuge at 4000rpm for 10min to remove the supernatant, then wash the obtained precipitate with absolute ethanol for 6 times to make the pH value close to 7, and then vacuum-dry it at 65°C for 24h , and ground through a 200-mesh sieve to obtain the dimercapto...
Embodiment 3
[0051] A kind of dimercaptopropanol modified clay mineral material adopts dimercaptopropanol to modify vermiculite, and the specific steps are as follows:
[0052] (1) Weigh 5 g of vermiculite that has been ground and passed through a 200-mesh sieve and added to 100 mL of absolute ethanol to make a suspension with a concentration of 5%, and the suspension is ultrasonically treated at 60 ° C for 10 min;
[0053] (2) press n 二巯基丙醇 :m 蛭石 = 0.855mmol / g ratio Add 4.275mmol dimercaptopropanol to the suspension, then adjust the pH of the suspension to 1 with 0.1mol / L HCl and NaOH, and reflux at 80°C for 20h to obtain a modified product solution ;
[0054] (3) Place the obtained modified product solution in a centrifuge and centrifuge at 4000rpm for 5min to remove the supernatant, then wash the obtained precipitate with absolute ethanol for 6 times to make the pH value close to 7, and then vacuum-dry it at 60°C for 24h , and ground through a 200-mesh sieve to obtain the dimercaptop...
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