Selectivity of commercial and novel mixed functionality cation exchange resins in mildly acidic sulfate and mixed sulfate–chloride solution

Properties of Lewatit® TP272, a commercial solvent impregnated cation exchange resin for cobalt recovery

“…As the resin functional groups are strongly bonded to the polymer structure, the extent of metal coordination complexes that can form are limited due to mobility constraints of the ligands compared with solvent extraction where ligands are fully mobile in the liquid organic phase. As such, there are no conventional cation exchange resins that offer a high degree of selectivity for cobalt over nickel, although resin functionalised with bis-picolylamine and iminodiacetate functional groups have shown to be selective for nickel over cobalt at low pH (Littlejohn and Vaughan, 2012). An IX resin process was also described whereby the cobalt could be selectively eluted from a loaded nickel and cobalt resin (Oxley and Barcza, 2013).…”

Preparation of high purity PCC from medium- and low-grade limestones using the strongly acidic cation exchange resin

“…Trilite SCR-B was used for synthesizing Ca(OH) 2 and CaCO 3 . In the ionic form of SCR, H + was substituted for Na + using HCl (35%) (1:1 kg:kg) [16,17, [21][22][23][24][25][26].…”

“…SCR, able to remove Ca 2+ and Mg 2+ , is a suitable ion exchange resin for water treatment such as softening of hard water and manufacture of pure water. Based on the physical and chemical properties of SCR, Ca(OH) 2 and CaCO 3 were synthesized using reaction with SCR after dissociative reaction of CaO prepared from medium-and low-grade limes [17, [21][22][23][24][25][26].…”

Recovery of nickel and cobalt from nickel laterite leach solution using chelating resins and pre‐reducing process

“…Another problem is that resins with iminodiacetate functional group tend to adsorb more contaminants. Littlejohn and Vaughan also showed that TP 220 had a lower affinity for unwanted impurities. The authors concluded that Lewatit TP 207 is poorly selective for nickel and cobalt, while Lewatit TP 220 is more selective for these metals …”

“…Despite the fact that TP 220 is more selective for copper than other metals, chelating resins with iminodiacetate functional are better to recover copper than resins with bis‐picolylamine . Littlejohn and Vaughan studied nickel and cobalt recovery using resins Lewatit TP 207 and 220, and the results showed that TP 220 is more selective for nickel and cobalt than TP 207. Another problem is that resins with iminodiacetate functional group tend to adsorb more contaminants.…”