Diffusion dialysis cation & anion exchange membrane,GuoChu Technology (Xiamen) Co., Ltd_specification/price/image

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Diffusion dialysis (DD) is an ion-exchange membrane (IEM) separation process driven by concentration gradient and has been applied for separation and recovery of acid/alkali waste solutions in a cost-effective and environmentally friendly manner.

Diffusion dialysis with ion-exchange membranes is mainly used today to recover acids or bases from a mixture with salts. The process is based on the fact that ion-exchange membranes generally show a high permeability for counterions while being more or less impermeable for co-ions. Exceptions are protons and hydroxide ions which can easily permeate both cation- and anion-exchange membranes. The transport mechanism in diffusion dialysis is more complex than in conventional dialysis due to the electrostatic interaction between positive and negative charges and the electroneutrality requirement。

Main technical indexes of diffusion dialysis CEM for alkali separation Diffusion dialysis CEM for alkali separation
Product type	TWDDC1 Standard	TWDDC2 High Flux
Thickness （mm）	0.25～0.28	0.15～0.25
Water content （%）	50～70	40～80
OH^- Diffusion Coefficient （10^-7m/s）	≥1	≥2
OH^-/AlO₂⁺ Separation factor	≥10	≥15
Applicqtion:alkali/salt separation in aluminum oxide,tungsten oxide,viscose fiber,etc.

Main technical indexes of diffusion dialysis AEM for acid separation Diffusion dialysis AEM for acid separation
Product type	TWDDA1 Standard	TWDDA2 High Flux
Thickness （mm）	0.30～0.32	0.20～0.30
Water content （%）	40～70	20～50
H⁺ Diffusion Coefficient （10^-7m/s）	≥5	≥5
H⁺/Fe²⁺ Separation factor	≥15	≥15
Applicqtion:acid/salt separation in wet metallurgy, Formed foll,steel processing and storage battery,etc.