Recovery of nickel and cobalt from acid leach pulp by ion exchange using chelating resin

Recovery of Cu(II) from nickel laterite leach using prereduction and chelating resin extraction: Batch and continuous experiments

“…After leaching and removing impurities, a purification process is necessary in order to remove all impure metals and either leave or remove the metals of interest. Among the purification processes that might be applied are solvent extraction, ion exchange, and precipitation, which is not selective, as Jiménez Correa et al showed for hydroxide's precipitation of nickel laterite …”

“…The goal of this work was to study a prereduction process applied to a synthetic solution in order to simulate conditions of real solutions obtained after the leaching process and to recover copper using chelating resin with iminodiacetic group Lewatit TP 207. According to Mendes and Martin and Littlejohn and Vaughan, chelating resins with an iminodiacetate functional group (as Lewatit TP 207) are appropriate for copper recovery, being more selective for this metal than others . Littlejohn and Vaughan studied six different ion exchange resins to recover metals from nickel laterite leach solution and the following three were chelating resins: TP 207, TP 220 (with bis‐picolylamine), and AP (with acetic acid‐picolyl functional group).…”

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

“…Most recently, the resin-in-pulp process has been developed for nickel and cobalt recovery from laterite ores (Mendes and Martins, 2005;Nicol and Zainol, 2003;Wassink et al, 2006). In this process, resin is contacted with partially neutralized laterite leach slurry in a series of counter current CSTRs in order to load nickel and cobalt onto the resin.…”

Development of an engineering model for nickel loading onto an iminodiacetic resin for resin-in-pulp applications: Part I—Method development and discussion of rate limiting factors

“…Preliminary work by Mintek suggested that iminodiacetic acid functionalized resins would be suitable for nickel recovery, provided that ferric iron was removed upstream of the RIP circuit (Green et al, 1998). Since then, a number of authors have published test data illustrating that such a recovery process should be technically feasible (Mendes and Martins, 2005;Nicol and Zainol, 2003;Wassink et al, 2006;Wyethe et al, 2002;Zainol and Nicol, 2009;Zontov, 2001). For pilot testwork with actual slurries, a pH of 4 was selected for operation in order to ensure all ferric was precipitated ahead of the RIP section, and most of the coprecipitated nickel and cobalt were able to be redissolved and recovered in the RIP step (Zainol, 2005).…”