Method of high-pressure homogeneously depolymerizing attapulgite crystal beam with microwave assistance
A technology of attapulgite and high-pressure homogenization, which is applied in the field of nano-material preparation and clay mineral deep processing. It can solve the problems of no precedent, weaken the interaction between rods and crystals, and achieve stable quality, easy control of the process, and no three wastes. Effect
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Embodiment 1
[0019] After crushing 50 kg of attapulgite raw ore, spray 32 kg of hydrogen peroxide solution (mass concentration 3.1%) into it, and then perform roller treatment to obtain a 0.5 mm thick sheet; then place the sheet in a microwave reactor Microwave treatment at a power of 10KW for 5 minutes, so that the oxidation reaction occurs inside the mineral aggregates, and the organic matter and cement are digested; then the minerals after microwave treatment are directly dispersed in 2000kg methanol aqueous solution (the mass fraction of methanol is 10%) made into a suspension; the suspension was subjected to high-pressure homogenization treatment at a pressure of 80 MPa, and the resulting suspension was passed through a 500-mesh vibrating sieve, and the solid product was centrifuged, dried in an oven at 60 ° C, and then pulverized to obtain One-dimensional nano attapulgite products.
[0020] When the obtained nano-attapulgite is dispersed in water at 20%, the attapulgite particle size...
Embodiment 2
[0022] After crushing 50kg of attapulgite raw ore, spray 32kg of hydrogen peroxide solution (mass concentration 8.5%) into it, and carry out roller treatment to obtain a 0.5 mm thick sheet, which is placed in a microwave reactor and heated at 2.5KW Microwave treatment at high power for 30 minutes, so that oxidation reaction occurs inside the mineral aggregates, and the organic matter and cement are digested; the minerals after microwave treatment are directly dispersed in 250 kg of methanol aqueous solution (the mass fraction of methanol is 10%) to make a suspension liquid, and then the suspension was subjected to high-pressure homogeneous treatment at a pressure of 5 MPa and then passed through a 500-mesh vibrating sieve, the solid product was centrifuged, dried at 100 °C, and then pulverized to obtain a one-dimensional nano-attapulgite product.
[0023] When the obtained nano-attapulgite is dispersed in water at 20%, the attapulgite particle size D90 in the suspension is ≤ 1....
Embodiment 3
[0025] After crushing 50kg of attapulgite raw ore, spray 32kg of hydrogen peroxide solution (mass concentration 3.1%) into it, and perform roller treatment to obtain a 2 mm thick sheet; Microwave treatment at high power for 20 min, so that the oxidation reaction occurs inside the mineral aggregates, and the organic matter and cement are digested; the minerals after microwave treatment are directly dispersed in 500 kg of 5% methanol aqueous solution to make a suspension (methanol The mass fraction is 5%), and then the suspension is subjected to high-pressure homogenization treatment under 20 MPa pressure and passed through a 500-mesh vibrating sieve, the solid product is centrifuged, dried at 80 ° C, and then pulverized to obtain a one-dimensional nano-attapulgite product.
[0026] When the obtained nano-attapulgite is dispersed in water at 20%, the particle size of attapulgite in the suspension is D90 ≤ 1 micron, and the average aspect ratio of attapulgite rod crystals is ≥ 32...
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