Method for fast stripping plastic-aluminum composite material by supercritical CO2 fluid
A composite material and supercritical technology, applied in the field of environmental protection, can solve problems that have not been seen before, and achieve the effect of low cost, good quality and abundant sources
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Embodiment 1
[0041] In a jacketed high-pressure vessel with a volume of 1000mL, add 100.0g of aluminum-plastic composite material fragments (wherein the plastic layer is polyethylene) that can pass through the sieve hole of a pulverizer with a diameter of 10-15mm, and then pour it into the high-pressure vessel at room temperature. Pump in carbon dioxide until the pressure in the high-pressure vessel reaches 25MPa, raise the temperature of the high-pressure vessel to 80°C, and repeatedly release and boost the pressure of carbon dioxide to stabilize the pressure in the high-pressure vessel at 25MPa. After the pressure in the high-pressure container is stabilized at 25MPa, keep it for 20 minutes, and then quickly release the pressure to normal pressure for desorption. Through visual observation, the aluminum and plastic are completely separated. Take out the separated aluminum-plastic fragments, place the aluminum foil and plastic in a pool to float the aluminum foil and plastic, dry the alumi...
Embodiment 2
[0043] In a jacketed high-pressure vessel with a volume of 1000ml, add 100.0g of aluminum-plastic composite material fragments (wherein the plastic layer is polyethylene) that can pass through the sieve hole of a pulverizer with a diameter of 10-15mm, and then pour it into the high-pressure vessel at room temperature. Pump carbon dioxide until the pressure in the high-pressure vessel reaches 15MPa, raise the temperature of the high-pressure vessel to 80°C, and repeatedly release and boost the pressure of carbon dioxide to stabilize the pressure in the high-pressure vessel at 15MPa. After the pressure in the high-pressure container is stabilized at 15MPa, keep it for 30 minutes, and then quickly release the pressure to normal pressure for desorption. Through visual observation, the aluminum and plastic are completely separated. Take out the separated aluminum-plastic fragments, place the aluminum foil and plastic in a pool to float the aluminum foil and plastic, dry the aluminum...
Embodiment 3
[0045] In a jacketed high-pressure vessel with a volume of 1000ml, add 100.0g of aluminum-plastic composite material fragments (wherein the plastic layer is polyethylene) that can pass through the sieve hole of a pulverizer with a diameter of 10-15mm, and then pour it into the high-pressure vessel at room temperature. Pump carbon dioxide until the pressure in the high-pressure vessel reaches 15MPa, raise the temperature of the high-pressure vessel to 60°C, and repeatedly release and boost the pressure of carbon dioxide to stabilize the pressure in the high-pressure vessel at 15MPa. After the pressure in the high-pressure container is stabilized at 15MPa, keep it for 40 minutes, and then quickly release the pressure to normal pressure for desorption. Through visual observation, the aluminum and plastic are completely separated. Take out the separated aluminum-plastic fragments, place the aluminum foil and plastic in a pool to float the aluminum foil and plastic, dry the aluminum...
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