A kind of preparation method of magnetic bentonite
A technology of bentonite and sodium bentonite, applied in chemical instruments and methods, inorganic chemistry, non-metallic elements, etc., can solve the problems of cumbersome steps and high cost, and achieve the effects of low preparation cost, low production threshold and environmental friendliness
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Embodiment 1
[0029] (1) Add 2.0 g FeCl 3 ∙6H 2 O was dissolved in 40 mL of ethylene glycol, and then 6.0 g of NaAc∙3H was added 2 O, form a transparent solution, then add 20 mL of ethylenediamine, add 0.08 g of sodium bentonite powder, and stir magnetically for 30 min; a well-mixed yellow-brown suspension is obtained (sodium bentonite powder is fully dispersed);
[0030] (2) Encapsulate the above mixture in a polytetrafluoroethylene reactor, heat and react at 180 °C for 8 h, and cool to room temperature after the reaction is completed;
[0031] (3) Wash the obtained black solid several times with distilled water (to remove impurities), and magnetically separate (the specific operation is to use a magnet to separate the magnetic substance (ie, magnetic bentonite) from the washed solid-liquid mixture, and discard the distilled water), drying, grinding, and passing through a 200-mesh sieve to obtain magnetic bentonite MB1;
[0032] At room temperature, add 0.2g MB1 to 25mL 100mg / L basic fu...
Embodiment 2
[0034] (1) Add 2.0 g FeCl 3 ∙6H 2 O was dissolved in 40 mL of ethylene glycol, and then 6.0 g of NaAc∙3H was added 2 0, form a transparent solution, then add 20 mL of ethylenediamine, add 0.2 g of sodium bentonite powder, and magnetically stir for 30 minutes; the sodium bentonite powder is fully dispersed to obtain a fully mixed yellow-brown suspension;
[0035] (2) Encapsulate the above mixture in a polytetrafluoroethylene reactor, heat and react at 190 °C for 10 h, and cool to room temperature after the reaction is completed;
[0036] (3) The obtained black solid was washed several times with distilled water, magnetically separated, dried, ground, and passed through a 200-mesh sieve to obtain magnetic bentonite MB2;
[0037] At room temperature, add 0.2g MB2 to 25mL 100mg / L basic fuchsin solution, shake for 90min, the adsorption rate reaches 98.36%; add 0.05g MB2 to 25mL 300mg / L basic fuchsin solution, shake for 90min, the The rate reached 68.34%.
Embodiment 3
[0039] (1) Mix 6.0 g NaAc∙3H 2 O and 2.0 g FeCl 3 ∙6H 2 O was dissolved in 40 mL of ethylene glycol to form a transparent solution, then 10 mL of ethylenediamine was added, 0.4 g of sodium bentonite powder was added, and magnetically stirred for 30 min; a fully mixed yellow-brown suspension was obtained;
[0040] (2) Encapsulate the above mixture in a polytetrafluoroethylene reactor, heat and react at 200 °C for 8 h, and cool to room temperature after the reaction is complete;
[0041] (3) The obtained black solid was washed several times with distilled water, magnetically separated, dried, ground, and passed through a 200-mesh sieve to obtain magnetic bentonite MB3;
[0042] At room temperature, add 0.2g MB3 to 25mL 100mg / L basic fuchsin solution, shake for 90min, the adsorption rate reaches 99.51%; add 0.05g MB3 to 25mL 300mg / L basic fuchsin solution, shake for 90min, the The rate reached 88.69%.
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