{"product_id":"cwareddcem","title":"Economic Diffusion Dialysis (DD) Cation-Exchange Membrane (CEM) for Waste Alkali Recovery, CWAREDDCEM","description":"\u003cp\u003eDiffusion dialysis (DD) (or related Donnan-driven dialysis processes) utilizing specialized cation-exchange membranes (CEMs) is an eco-friendly, energy-saving membrane separation technology designed to recover free alkalis (such as sodium hydroxide, NaOH, or potassium hydroxide, KOH) from industrial wastewater and process streams. Like acid recovery diffusion dialysis, it operates entirely on a concentration gradient without requiring an external direct-current (DC) power source.\u003c\/p\u003e\n\u003cp\u003eTo withstand and perform effectively in alkaline environments, diffusion dialysis and Donnan dialysis CEMs require specific physicochemical traits: (1) \u003cstrong\u003eHigh Alkali Permeability\u003c\/strong\u003e: Maximizes the flux of alkali constituents across the membrane, ensuring high processing capacity and a compact physical stack footprint. (2) \u003cstrong\u003eStrong Alkali and Chemical Resistance\u003c\/strong\u003e: Because feed and recovered solutions involve concentrated caustics (NaOH or KOH), the polymer matrix (often reinforced fluoropolymers or specialized stable hydrocarbon backbones) must resist chemical degradation, softening, or structural breakdown over long-term operation. (3) \u003cstrong\u003eHigh Permselectivity\u003c\/strong\u003e: Effectively blocks the migration of unwanted anions and multivalent ions (such as dissolved silicates, aluminates, or heavy metals) to ensure high purity in the recovered alkali product. (4) \u003cstrong\u003eLow Swelling Ratio\u003c\/strong\u003e: Minimizes dimensional changes and warping when subjected to sharp ionic strength shifts between concentrated waste streams and dilute receiving water.\u003c\/p\u003e\n\u003ctable style=\"width: 100.071%; height: 467.2px;\" width=\"100%\"\u003e\n\u003ctbody\u003e\n\u003ctr style=\"height: 36.9125px;\"\u003e\n\u003ctd style=\"width: 33.767%; height: 36.9125px;\"\u003e\u003cem\u003ePart Number\u003c\/em\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 66.0192%; height: 36.9125px;\"\u003e\n\u003cp\u003e\u003cspan\u003eCWAREDDCEM (C-WAR-EDDCEM)\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 168.138px;\"\u003e\n\u003ctd style=\"width: 33.767%; height: 168.138px;\"\u003e\u003cem\u003eWorking Mechanism\u003c\/em\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 66.0192%; height: 168.138px;\"\u003e\n\u003cp\u003eThe whole diffusion dialysis is consisted of a series of dialysis and diffusion chambers that was separated by a cation exchange membrane. The waste alkali solution and receiving solution (eg: tap water) was fed into chambers and the cations (also bring hydroxide ions) from the waste acid will go through the membrane and enter into the tap water to complete the alkali recovery.  \u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 36.9125px;\"\u003e\n\u003ctd style=\"width: 33.767%; height: 36.9125px;\"\u003e\u003cem\u003eMembrane Thickness (Dry)\u003c\/em\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 66.0192%; height: 36.9125px;\"\u003e\n\u003cp\u003e\u003cspan\u003e~0.12 um\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 36.9125px;\"\u003e\n\u003ctd style=\"width: 33.767%; height: 36.9125px;\"\u003e\u003cem\u003eDialysis Constant\u003c\/em\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 66.0192%; height: 36.9125px;\"\u003e\n\u003cp\u003e\u003cspan\u003e\u0026gt;1*10^-7 m\/s\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 40.6375px;\"\u003e\n\u003ctd style=\"width: 33.767%; height: 40.6375px;\"\u003e\u003cem\u003eOH-\/ALO2+ Separation Factor \u003c\/em\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 66.0192%; height: 40.6375px;\"\u003e\n\u003cp\u003e\u0026gt;10\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 36.9125px;\"\u003e\n\u003ctd style=\"width: 33.767%; height: 36.9125px;\"\u003e\u003cem\u003eWater Content\u003c\/em\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 66.0192%; height: 36.9125px;\"\u003e\n\u003cp\u003e\u0026gt;30%\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 36.9125px;\"\u003e\n\u003ctd style=\"width: 33.767%; height: 36.9125px;\"\u003e\u003cem\u003eOperation Temperature\u003c\/em\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 66.0192%; height: 36.9125px;\"\u003e\n\u003cp\u003e≤50°C\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 36.9125px;\"\u003e\n\u003ctd style=\"width: 33.767%; height: 36.9125px;\"\u003e\u003cem\u003ePenetration Strength\u003c\/em\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 66.0192%; height: 36.9125px;\"\u003e\n\u003cp\u003e\u003cspan\u003e\u0026gt; 5 N\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 36.95px;\"\u003e\n\u003ctd style=\"width: 33.767%; height: 36.95px;\"\u003e\u003cem\u003ePackage Grade\u003c\/em\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 66.0192%; height: 36.95px;\"\u003e\n\u003cp\u003e\u003cspan\u003eL10-40cm*W10-40cm\/pcs\/pack\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003eReference: \u003c\/p\u003e\n\u003col\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/aiche.onlinelibrary.wiley.com\/doi\/abs\/10.1002\/aic.70152\"\u003eX. Wang, et al., Ultrathin porous cation exchange membranes for high-performance diffusion dialysis alkali recovery, AIChE J., 2026, 72, e70152\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"https:\/\/www.sciencedirect.com\/science\/article\/abs\/pii\/S0376738813000379\"\u003eJ. Hao, et al., A simple and green preparation of PVA-based cation exchange hybrid membranes for alkali recovery, Journal of Membrane Science, 2013, 433, 10-16\u003c\/a\u003e \u003c\/li\u003e\n\u003c\/ol\u003e","brand":"HZHMKJ","offers":[{"title":"10cm * 10cm","offer_id":48379717255398,"sku":"CWAREDDCEM1010","price":49.0,"currency_code":"USD","in_stock":true},{"title":"20cm * 20cm","offer_id":48379717288166,"sku":"CWAREDDCEM2020","price":129.0,"currency_code":"USD","in_stock":true},{"title":"40cm * 40cm","offer_id":48379717353702,"sku":"CWAREDDAEM4040","price":429.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0774\/6591\/1526\/files\/CWAREDDCEM_main.jpg?v=1789580765","url":"https:\/\/echemsupplies.com\/products\/cwareddcem","provider":"EChem Supplies","version":"1.0","type":"link"}