At present, lithium is widely used in electronics, chemistry, new energy, and pharmaceuticals. Lithium resources mainly come from salt lakes, minerals, and seawater. With the advancement of waste resource recycling in recent years, spent lithium batteries have also become an important source. The process of extracting lithium from these raw materials usually involves chemical precipitation or solvent extraction methods.
The solvent extraction method achieves efficient separation of lithium from impurity elements such as Na, K and B by using a composite extractant. Through continuous three-phase countercurrent extraction of gas-liquid-liquid, the recovery rate of lithium is over 90%, and the purity of the lithium product is over 96%. The method has a large processing capacity, simple process and equipment, small investment, effectively utilizes industrial tail gas, is energy-saving and environmentally friendly, and enables continuous production. However, in the current process of recovering lithium by solvent extraction, there are still problems such as unstable countercurrent extraction indicators and low countercurrent extraction rate.
An efficient carbon dioxide separation device comprises:
The upper part of the reaction cylinder is equipped with a gas-liquid separation device. The inner wall of the reaction cylinder is fitted with inner half-tube coils, with the diameter of the half-tubes ranging from 50 to 100 mm.
The reaction cylinder is equipped with multiple layers of stirring paddles. Between the bottom of the reaction cylinder and the bottom of the stirring paddles, there is an aeration pipe with a lower opening diameter of 5mm. At the bottom of the equipment, there are the first liquid inlet, the second liquid inlet, the third liquid inlet and the fourth liquid inlet.
An efficient carbon dioxide separation device, characterized in that the height-to-diameter ratio of the equipment is (3-5):1.
An efficient carbon dioxide separation device, characterized in that on the side of the equipment, a first pH value online detector and a second pH value online detector are provided. The first pH value detector is set at a vertical distance of 10 cm above the first liquid inlet; the second pH value detector is set 20 cm above the middle position of the reaction chamber. A temperature on-site meter is provided between the first pH value detector and the second pH value detector.
An efficient carbon dioxide separation device, by adopting a specially designed inner wall of the reaction cylinder and cooperating with the aeration pipe, achieves a highly efficient gas-liquid-liquid mixing reaction. It is particularly suitable for the stripping system of organic phase + water phase + gas, and can significantly improve the stripping efficiency, with a lithium stripping rate of over 95%.
At present, lithium is widely used in electronics, chemistry, new energy, and pharmaceuticals. Lithium resources mainly come from salt lakes, minerals, and seawater. With the advancement of waste resource recycling in recent years, spent lithium batteries have also become an important source. The process of extracting lithium from these raw materials usually involves chemical precipitation or solvent extraction methods.
The solvent extraction method achieves efficient separation of lithium from impurity elements such as Na, K and B by using a composite extractant. Through continuous three-phase countercurrent extraction of gas-liquid-liquid, the recovery rate of lithium is over 90%, and the purity of the lithium product is over 96%. The method has a large processing capacity, simple process and equipment, small investment, effectively utilizes industrial tail gas, is energy-saving and environmentally friendly, and enables continuous production. However, in the current process of recovering lithium by solvent extraction, there are still problems such as unstable countercurrent extraction indicators and low countercurrent extraction rate.
An efficient carbon dioxide separation device comprises:
The upper part of the reaction cylinder is equipped with a gas-liquid separation device. The inner wall of the reaction cylinder is fitted with inner half-tube coils, with the diameter of the half-tubes ranging from 50 to 100 mm.
The reaction cylinder is equipped with multiple layers of stirring paddles. Between the bottom of the reaction cylinder and the bottom of the stirring paddles, there is an aeration pipe with a lower opening diameter of 5mm. At the bottom of the equipment, there are the first liquid inlet, the second liquid inlet, the third liquid inlet and the fourth liquid inlet.
An efficient carbon dioxide separation device, characterized in that the height-to-diameter ratio of the equipment is (3-5):1.
An efficient carbon dioxide separation device, characterized in that on the side of the equipment, a first pH value online detector and a second pH value online detector are provided. The first pH value detector is set at a vertical distance of 10 cm above the first liquid inlet; the second pH value detector is set 20 cm above the middle position of the reaction chamber. A temperature on-site meter is provided between the first pH value detector and the second pH value detector.
An efficient carbon dioxide separation device, by adopting a specially designed inner wall of the reaction cylinder and cooperating with the aeration pipe, achieves a highly efficient gas-liquid-liquid mixing reaction. It is particularly suitable for the stripping system of organic phase + water phase + gas, and can significantly improve the stripping efficiency, with a lithium stripping rate of over 95%.