Abstract: Use of a separation material comprising picolinic acid ester or picolinic acid amide functional groups immobilised on a solid support to selectively remove Ni from an aqueous solution.

Abstract: A method of recycling Ni and/or Co from a functional material such as a battery or catalyst material, the method comprising: forming an acidic aqueous recycling feed of the functional material by acid leaching the functional material or a derivative thereof, the acidic aqueous recycling feed comprising Ni and/or Co in solution; contacting the acidic aqueous recycling feed with an organic solvent extraction composition; and extracting one or both of Ni and Co from the acidic aqueous recycling feed into the organic solvent extraction composition, wherein the organic solvent extraction composition comprises: an organic solvent which is immiscible with the acidic aqueous recycling feed; a picolinic acid ester or picolinic acid amide which is soluble in the organic solvent; and a phase transfer catalyst.

Abstract: A method for separating at least two metals from each other in a metal refining process, the method comprising: injecting a feed solution comprising the metals into a column or flow pipe comprising a monolithic solid body having a plurality of channels; and flowing the feed solution through the plurality of channels in the monolithic solid body to separate the metals.

Abstract: A method for separating of at least two transition metals, the method comprising: injecting a feed solution into a chromatography column comprising a chromatographic support media, the feed solution comprising at least two transition metals; eluting the feed from the column in an elution cycle by flowing an eluent through the column, wherein a concentration of the eluent is reduced during the elution cycle prior to elution of at least one of the transition metals.