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I. Principle of Bipolar Membrane Technology Bipolar Membrane Electrodialysis Process for Sodium Hypophosphite Technical Advantages (1) Process Flow
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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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2025-05-30
Practical Application Cases of Membrane Separation Technology in Mixed Acid Recovery Applications of Different Membrane Separation Methods in Mixed Acid Recovery Overview of Membrane Separation Technology
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Exploration on the Application of Membrane Separation Technology in Alkali Recovery of Aluminum Alloy Profile Processing Principles of Membrane Separation Technology
查看详情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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