A resin or polymer that functions as a medium for ion exchange is known as an ion-exchange resin or ion-exchange polymer. It is an insoluble matrix (or support structure) often in the shape of tiny (0.25-1.43 mm radius) microbeads, which are typically white or yellowish and made from an organic polymer substrate.
The process is known as ion exchange because the beads are often porous (with a precise size distribution that will alter their properties), offering a wide surface area on and inside them where the trapping of ions happens along with the concomitant release of other ions. Ion-exchange resin comes in a variety of varieties. Polystyrene sulfonate and polyacrylate are the two main ingredients in most commercial resins.
The Global ion exchange resins market accounted for $XX Billion in 2022 and is anticipated to reach $XX Billion by 2030, registering a CAGR of XX% from 2023 to 2030.
New ion exchange resin for the extraction of lithium has been launched by LANXESS. Lewatit TP 308 is a selective ion exchange resin that is perfect for the purification of lithium salt solutions, and it is being added to the portfolio of resins by specialty chemicals business LANXESS.
Ion exchange resins have a number of benefits over the conventional technique for final polishing lithium brine, which is based mostly on precipitation operations. Calcium removal techniques that use ion exchange significantly reduce the amount of time and money required.
The macroporous Lewatit TP 308 has been created specifically to handle low-concentration lithium salt solutions (cLi 2 g/l) comprising alkali, alkaline earth, and heavy metals at relatively high concentrations ranging from 100 mg to several grammes per litre. Such solutions can be found, for instance, in the geothermal brine treatment process after the desorption from primary absorber material.
Because of the excellent exchange kinetics, the removal of the polyvalent ions—primarily calcium—from these solutions occurs very effectively, with little leakage and at high flow rates.
The pressure drop across the resin substrate is very minimal. Lewatit TP 308 outperformed a number of competing products in laboratory testing, according to the results.
The resin has a high total capacity of more than 4.3 eq/l (equivalents per litre), which is one particularly outstanding property. This translates to longer intervals between the regeneration processes than is the case with ordinary resins and improved service lives.
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