Bipolar bentonite material and preparation method thereof
A bentonite and bipolar technology, which is applied in the field of bipolar bentonite materials and their preparation, can solve the problem that the organic carbon content is low, the hydrophilic performance is not significantly improved, and the adsorption performance of organic pollutants and heavy metal ion pollutants is not significantly improved at the same time. and other problems, to achieve the effect of good adsorption and great application value
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[0044] The preparation method of bipolar bentonite material of the present invention comprises the following steps:
[0045] Provide a dispersion liquid with bentonite raw material as the dispersed phase;
[0046] reacting the dispersion with a surfactant to obtain a reaction product;
[0047] Washed with the reaction product, then dried.
[0048] In the method of the above invention, in the step of providing the dispersion liquid, the dispersion liquid may be a dispersion liquid using water as a dispersion medium. The mass concentration of the dispersion can be 1.0-10.0%, such as 1.0%, 1.1%, 1.2%, 1.5%, 2%, 3%, 5%, 5.5%, 8%, 9%, 9.5% or 10%.
[0049] In the reaction step, in order to further improve the efficiency of the reaction, a surfactant may be added to the dispersion in the form of a solution. The temperature of the reaction is preferably 25-80°C, such as 25°C, 25.5°C, 27°C, 30°C, 40°C, 50°C, 55°C, 60°C, 70°C, 75°C, 78°C, 80°C. Under the temperature, the reaction t...
Embodiment 1
[0054] The specific implementation steps are as follows:
[0055] (1) Take by weighing 40g of bentonite raw material that is dried and crushed to pass through a 100 mesh sieve, add 1200mL deionized water to stir and disperse in the laboratory reactor, and make a bentonite suspension. The bentonite raw material is calcium-based bentonite, Mongolian The destoned content is 92%, and the cation exchange capacity is 64mmol / 100g;
[0056] (2) adopt metering pump to add the dodecyl trimethylammonium bromide that contains 1.00 times of bentonite raw material cation exchange capacity and the dodecyl dimethyl betaine of 0.25 times of cation exchange capacity to add step (1) described bentonite In the suspension, stir and react at 25°C for 24h;
[0057] (3) The aforementioned reaction product was filtered and washed with deionized water until no foam was generated, and dried in a constant temperature blast drying oven at 50°C for 12 hours;
[0058] (4) Grinding the aforementioned dried...
Embodiment 2
[0061] The steps are the same as in Example 1, except that in step (2), the modifying agent is 0.75CEC of octadecyltrimethylammonium bromide and 0.50CEC of nonylphenol polyoxyethylene ether.
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