Reinforced Anion-Exchange Membrane (NEXIONIC A450R) for Electrodialysis and Electrodeionization, CEERAEMA450R
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The NEXIONIC® A450R is a high-performance, reinforced anion exchange membrane (AEM). It is a "strong-base" type membrane containing quaternary ammonium ($NR_4^+$) functional groups, designed to facilitate the transport of anions (like $OH^-$ or $Cl^-$) while blocking cations.Much like its cation-exchange sibling (the C450R), the A450R is engineered for industrial-scale durability where standard, non-reinforced membranes would be too fragile.
The A450R is a "workhorse" membrane typically used in large-scale industrial stacks rather than small, high-power fuel cells. (1) Electrodialysis (ED/EDR): Used for seawater desalination and the demineralization of industrial process water. (2) Nitrate & Sulfate Removal: Ideal for selective removal of unwanted anions from groundwater or industrial runoff. (3) Electrodeionization (EDI): Acts as the anion-selective barrier in the production of ultrapure water. (4) Acid Recovery (Diffusion Dialysis): Used to recover free acids (like HCl or H2SO4) from waste streams in metal pickling or mining. (5) Chromium & Metal Finishing: Used in plating baths to separate the anode and cathode chambers to prevent the contamination of the electrolyte.
| Part Number | CEERAEMA450R (C-EE-RAEM-A450R) |
| Ion Type | Anion (–NR₄⁺) |
| Reinforcement | Polypropylene (PP) Mesh |
| Thickness (um) | 450 |
| Ion Exchange Capacity (meq/g) | ~1.4-1.5 |
| Area Resistance (Ω·cm² in NaCl) | <30 |
| Operating pH | 1-10 |
| Operating Temperature | < 70 °C is recommended |
| Pre-treatment Required | NaCl 72h soak |
| Primary Applications | Electrodialysis, Electrodeionization, Electrochemical Mining |
| Package Grade | 10cm*10cm/pcs/pack (other sheet size of 20cm*20cm, 30cm*30cm, 40cm*40cm also can be supplied upon request) |
Use Note:
The NEXIONIC® A450R is a "dry" Cl- form and requires proper activation before it becomes ionically conductive.
(1) Initial Hydration: Soak in a 5% NaCl solution for 24–48 hours. The membrane will expand as it hydrates; always soak before final cutting to size.
(2) Ion Exchange (if needed): To convert to the Hydroxide (OH^-) form, soak the hydrated membrane in 1.0 M NaOH for 12–24 hours, followed by a thorough rinse with deionized water.
(3) Storage: (a) Dry form: Store in a cool, dark place in the original packaging. (b) Wet form: Store in a 0.5%–1.0% NaCl solution. To prevent mold/algae growth during long-term storage, add a small amount of preservative like sodium sulfite.