A regenerator cell for regenerating metallic particles is provided. The regenerator cell includes: a housing for containing a quantity of electrolyte; an anode; a cathode; a cavity at least partially defined by the housing, the cathode and the anode; an inlet port for supplying electrolyte to the cell, the inlet port in fluid communication with the cavity; and an outlet port for expelling electrolyte, particles and/or gas from the cell, the outlet port in fluid communication with the cavity.

A regenerator cell for regenerating metallic particles is provided. The regenerator cell includes: a housing for containing a quantity of electrolyte; an anode; a cathode; a cavity at least partially defined by the housing, the cathode and the anode; an inlet port for supplying electrolyte to the cell, the inlet port in fluid communication with the cavity; and an outlet port for expelling electrolyte, particles and/or gas from the cell, the outlet port in fluid communication with the cavity.

The present invention relates to a process for recovering platinum group metals from a feed containing one or more precursor compounds of one or more platinum group metal ions, wherein the process comprises the steps of (i) supplying to a cathode compartment of an electrochemical cell equipped with a cathode comprising a gas diffusion electrode with a porous electrochemically active material, the feed containing the one or more precursor compounds to form a liquid phase in the cathode compartment, (ii) supplying a CO2 containing gas to the cathode compartment, (iii) applying a potential to the cathode which is such as to cause electrochemical reduction of the CO2 to CO, (iv) and recovering from the liquid phase precipitated particles of the one or more platinum group metals in clemental form.

The present invention relates to a process for recovering platinum group metals from a feed containing one or more precursor compounds of one or more platinum group metal ions, wherein the process comprises the steps of (i) supplying to a cathode compartment of an electrochemical cell equipped with a cathode comprising a gas diffusion electrode with a porous electrochemically active material, the feed containing the one or more precursor compounds to form a liquid phase in the cathode compartment, (ii) supplying a CO2 containing gas to the cathode compartment, (iii) applying a potential to the cathode which is such as to cause electrochemical reduction of the CO2 to CO, (iv) and recovering from the liquid phase precipitated particles of the one or more platinum group metals in clemental form.

Lead from lead acid battery scrap is recovered in two separate production streams as clean grid lead and as high-purity lead without smelting. In preferred aspects, lead recovery is performed in a continuous process that uses an aqueous electroprocessing solvent and electro-refining. Spent electroprocessing solvent and/or base utilized to treat lead paste from the lead acid battery scrap can be recycled to the recovery process.

Lead from lead acid battery scrap is recovered in two separate production streams as clean grid lead and as high-purity lead without smelting. In preferred aspects, lead recovery is performed in a continuous process that uses an aqueous electroprocessing solvent and electro-refining. Spent electroprocessing solvent and/or base utilized to treat lead paste from the lead acid battery scrap can be recycled to the recovery process.

Various embodiments provide a process roasting a metal bearing material under oxidizing conditions to produce an oxidized metal bearing material, roasting the oxidized metal bearing material under reducing conditions to produce a roasted metal bearing material, and leaching the roasted metal bearing material in a basic medium to yield a pregnant leach solution.

Various embodiments provide a process roasting a metal bearing material under oxidizing conditions to produce an oxidized metal bearing material, roasting the oxidized metal bearing material under reducing conditions to produce a roasted metal bearing material, and leaching the roasted metal bearing material in a basic medium to yield a pregnant leach solution.

Various embodiments provide a process roasting a metal bearing material under oxidizing conditions to produce an oxidized metal bearing material, roasting the oxidized metal bearing material under reducing conditions to produce a roasted metal bearing material, and leaching the roasted metal bearing material in a basic medium to yield a pregnant leach solution.

Various embodiments provide a process roasting a metal bearing material under oxidizing conditions to produce an oxidized metal bearing material, roasting the oxidized metal bearing material under reducing conditions to produce a roasted metal bearing material, and leaching the roasted metal bearing material in a basic medium to yield a pregnant leach solution.