2025-06-04
Principles of Membrane Separation Recovery Technology . Process Flow of Membrane Separation Recovery Application of Membrane Separation Technology in the Recovery of HCl and H₂SO₄ in Pharmaceutical Engineering
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Sodium Hydroxide Recovery Technology in Tungsten Metallurgy Industry
2025-05-27
Challenges and Development Directions for Membrane Separation Recovery Technology (1) Challenges . Principles of Membrane Separation Recovery Technology (1) Principles of Membrane Separation Membrane separation is a process that drives ions through a semipermeable membrane using a concentration gradient. In NaOH recovery for tungsten metallurgy, the waste solution containing NaOH and water are placed on either side of a cation-exchange membrane (CEM). Due to the concentration gradient, Na⁺ and OH⁻ in the NaOH solution tend to diffuse toward the water side. The CEM allows Na⁺ to pass through smoothly, while WO₃²⁻ (from sodium tungstate) cannot permeate the membrane. Meanwhile, OH⁻ more easily crosses the membrane to combine with Na⁺ on the water side, forming NaOH and achieving separation of alkali and salt.
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Exploration of Electrodialysis Applications in Separation of Pharmaceutical Intermediates and Salts
2025-05-27
Exploration of Electrodialysis Applications in Separation of Pharmaceutical Intermediates and Salts 1. Principles and Characteristics of Electrodialysis Technology (1) Principles Electrodialysis operates under a direct current (DC) electric field, using potential difference as the driving force and the selective permeability of ion-exchange membranes to enable the migration of anions and cations in solutions toward the anode and cathode, respectively. With alternating arrangements of anion-exchange membranes (AEMs) and cation-exchange membranes (CEMs), multiple compartments are formed. When a salt-containing pharmaceutical intermediate solution flows through these compartments, salt ions (cations passing through CEMs and anions through AEMs) migrate to adjacent concentration compartments under the combined action of the electric field and membrane selectivity, while the pharmaceutical intermediates are retained in the desalination compartments, achieving separation.
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Exploration of Electrodialysis Applications in Circulating Water Treatment
2025-05-22
1. Overview of Electrodialysis Technology 1.1 Basic Principles 2. Roles of Electrodialysis in Circulating Water Treatment 2.1 Ion Removal
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Analysis of HNO₃ and HF Membrane Separation and Recovery Technology in Polysilicon Production
2025-05-22
Practical Application Case Challenges Facing Membrane Separation and Recovery Technology 4.1 Membrane Fouling
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Exploration of Electrodialysis in Material Concentration Field
2025-05-19
Applications of Electrodialysis in Different Material Concentration Fields Principle and Characteristics of Electrodialysis Technology (一) Principle
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