A Method for Reducing Membrane Resistance During Membrane Extraction
An extraction and resistance technology, which is applied in the field of reducing membrane resistance in the process of membrane extraction, can solve the problems of difficulty in overcoming membrane phase resistance and low membrane extraction efficiency, so as to reduce membrane mass transfer resistance, improve production efficiency, and improve mass transfer efficiency. Effect
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specific Embodiment approach 1
[0037] Specific implementation mode one (refer to figure 2 ): This embodiment adopts such as figure 2 The small-scale membrane extraction device made in the laboratory is shown to simulate the actual membrane extraction process. The device is divided into left and right chambers, both of which have a volume of 138 ml. They are the water phase chamber and the oil phase chamber respectively. The oil phase uses xylene solvent , the water phase is deionized water, the solute is glacial acetic acid, and the bottom of the two phases is stirred with a magnetic stirrer; the membrane is Celgard2500 (single-skinned polypropylene membrane, which has strong hydrophobicity, so the oil phase infiltrates the membrane pores), and the membrane thickness is about 40μm, the membrane is sealed in the middle of the two chambers; the simulation of the actual membrane extraction process is as follows:
[0038]① Soak the Celgard2500 membrane in xylene, and then assemble the membrane into the middl...
specific Embodiment approach 2
[0047] Specific implementation mode two (refer to figure 2 ): This embodiment adopts such as figure 2 The small-scale membrane extraction device made in the laboratory is shown to simulate the actual membrane extraction process. The device is divided into left and right chambers, both of which have a volume of 138 ml. They are the water phase chamber and the oil phase chamber respectively. The oil phase uses xylene solvent , the water phase is deionized water, the solute is glacial acetic acid, and the bottom of the two phases is stirred with a magnetic stirrer; the membrane is a composite ultrafiltration membrane with a molecular weight cut-off of 2Kd, and its support layer is polyester non-woven fabric with large pores In the separation layer, the contact angle is 80°, which belongs to partially wetted material. The separation layer is made of polyethersulfone material, and the contact angle is 140°, which belongs to water non-wetting material. The film thickness is about ...
specific Embodiment approach 3
[0058] Specific implementation mode three (refer to figure 2 ): This embodiment adopts such as figure 2 The small-scale membrane extraction device made in the laboratory is shown to simulate the actual membrane extraction process. The device is divided into left and right chambers, both of which have a volume of 138 ml. They are the water phase chamber and the oil phase chamber respectively. The oil phase uses xylene solvent , the water phase is deionized water, the solute is glacial acetic acid, and the bottom of the two phases is stirred with a magnetic stirrer; the membrane is a composite ultrafiltration membrane with a molecular weight cut-off of 5Kd, and its support layer is polyester non-woven fabric with large pores For the separation layer, the contact angle is 120°, which belongs to the non-wetting material. The separation layer is made of polyethersulfone material, and the contact angle is 140°, which belongs to the water non-wetting material. The film thickness is...
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