Chelating Resin For Brine Refining

Lanlang® offers you One-Stop Service for complete range of ion exchange resin applications.

Lanlang ® TY CH530 is a kind of chelating resin that is comprised of a styrene and DVB copolymer with a unique macroporous structure and weakly acidic aminophosphonic (-CH2NHCH2PO3-) compound. This exceptional product boasts the ability to effectively fix and chelate a variety of cations in a wide range of solutions, even those with high content. Its positive and beneficial properties make it an excellent choice for a wide range of applications.

The production process of ion-exchange membrane caustic soda is to precipitate alkaline earth metal ions from the original salt or brine with double alkali. After microfiltration membrane filtration, the chelating resin tower is used for secondary refining to remove Ca2+ and Mg2+ in the brine with high precision, and then electrolyze the secondary refined brine to produce high quality ion-exchange membrane caustic soda with higher purity compared with metal anode method.

However, the industrial salt and brine used in the production process of ion-exchange membrane caustic soda contain a certain amount of iodide, which results in the brine containing iodine. The reduction potential of iodine is much lower than that of chlorine, so that iodine can be oxidized prior to chlorine at a lower concentration. Iodate is formed in the anode chamber and deposited on the surface of the ion membrane, which reduces the effective area of the ion membrane. And reduces the current efficiency of the electrolytic cell. In addition, the iodine ion in brine of ion-exchange membrane caustic soda process will accumulate for a long time, resulting in serious iodine exceeding the standard in every process from primary brine to electrolysis. The higher the coexisting content of iodine ion and other ions in brine, the faster the current efficiency decreases, it has become a common subject faced by the majority of ion-exchange membrane caustic soda production enterprises.

Cation Resin

Anion Resin

Mixed Bed Resin

Chelating Resin

Specialty Resin

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