Modified diatomite with multistage-pore structure and preparation method therefor
A diatomite and multi-level pore technology, which is applied in the field of preparation of modified diatomite, can solve the problems of small control range and single pore structure, and achieve the effect of low cost and fast and convenient operation
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Embodiment 1
[0020] 1) Take 1 kg of diatomite raw soil (above grade two soil), soak it in 1M hydrochloric acid solution for 1 hour, filter off the hydrochloric acid solution, add water and wash it three times; soak the diatomite raw soil after pickling in 1M sodium hydroxide solution 20 minutes, filter the solution, add water and wash three times; 150 ° C blast drying for 3 hours to obtain diatomite with a silica content of more than 98% as a modified raw material;
[0021] 2) Take 1 kg of the above-mentioned diatomite raw material, stir and disperse it in 10 liters of 10% ethanol, add 100 g of tetraethoxysilane, 13 g of tetramethylammonium hydroxide and 100 g of water, and stir at a constant temperature of 35 ° C for 12 hours;
[0022] 3) The product after the above reaction was centrifuged, washed with water three times, dispersed in a high-purity aqueous solution, adjusted to a pH value of about 8.5, and aged at 90°C for 6 hours;
[0023] 4) After the reaction product is centrifuged, it...
Embodiment 2
[0025] 1. Take 1 kg of diatomite raw soil (above grade 2 soil), soak it in 1M hydrochloric acid solution for 1 hour, filter off the hydrochloric acid solution, add water and wash it three times; soak the diatomite raw soil after pickling in 1M sodium hydroxide solution 20 minutes, filter the solution, add water and wash three times; blow dry at 150°C for 3 hours; obtain diatomite with a silica content of more than 98% as a modified raw material;
[0026] 2. Take 1 kg of the above-mentioned diatomite raw material, stir and disperse it in 10 liters of ethanol, add 100 g of tetraethoxysilane, 10 g of cetyltrimethylammonium bromide, 13 g of tetraethylammonium hydroxide and 100 g of water, 35 ℃ constant temperature stirring reaction for 12 hours;
[0027] 3. Centrifuge the product after the above reaction, wash it with water three times, disperse it in a high-purity aqueous solution, adjust the pH value of the solution to about 8.5, and stir and age at 90°C for 6 hours;
[0028] 4...
Embodiment 3
[0030] 1. Take 1 kg of diatomite raw soil (above grade 2 soil), soak it in 1M hydrochloric acid solution for 1 hour, filter off the hydrochloric acid solution, add water and wash it three times; soak the diatomite raw soil after pickling in 1M sodium hydroxide solution 20 minutes, filter the solution, add water and wash three times; blow dry at 150°C for 3 hours; obtain diatomite with a silica content of more than 98% as a modified raw material;
[0031] 2. Take 1kg of the above-mentioned diatomite raw material, stir and disperse it in 10 liters of ethanol, add 100g of tetraethoxysilane, 10g of cetyltrimethylammonium bromide, 13g of tetrabutylammonium hydroxide and 100g of water, and keep the temperature at 35°C Stirring and reacting for 12 hours;
[0032] 3. Centrifuge the product after the above reaction, wash it with water three times, disperse it in a high-purity aqueous solution, adjust the pH value of the solution to about 8.5, and stir and age at 90°C for 6 hours;
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