Abstract: A system for regenerating ion exchange resin can include a vehicle, a tank coupled to the vehicle and configured to supply brine and receive waste solution, a pump fluidly coupled to the tank and configured to be fluidly coupled to an ion exchange resin of an ion exchange column, a control system configured to control the pump, and one or more sensors configured to measure properties of the brine and/or waste solution and provide data to the control system. The one or more sensors can include a conductivity meter configured to measure the conductivity of the waste solution. The pump can supply brine which is configured to regenerate the ion exchange resin by removing one or more impurities from the ion exchange resin of the ion exchange column. The control system can collect data and use it to adjust system operation.

Abstract: Process for producing a copper-containing aqueous solution, in which a copper mass is dissolved in the presence of an oxidant in an aqueous leach liquor containing monoethanolamine and (HMEA)2CO3. The leach liquor is produced by partially carbonating the monoethanolamine.