Abstract: A method for electrochemically minimizing sulfide scale buildup on a metal surface by connecting the surface as an anode and periodically reversing the current flow at predetermined intervals.

Abstract: A cathode matrix is provided for producing dislodgeable metal slugs of electrolytically deposited metal comprising a laminar metal substrate having an array of raised bosses with exposed flat faces distributed over the substrate and integral therewith. The total surface of the cathode is covered by an adherent layer of an electrolyte resistant, substantially impermeable, low electrical conductivity material, such as fluorinated hydrocarbon, except for the exposed faces of the bosses, the exposed faces being adapted to receive electrodeposited metal thereon.

Abstract: A fluid bed electrolysis process is provided for the recovery of nickel from nickel-containing solution, e.g., leach solution, in which a fluid bed of substantially pure nickel particles or pellets of size ranging from about 150 to 2000 microns is employed, the fluid bed being preferably formed of reduced nickel oxide, such as hydrogen-reduced nickel oxide.

Abstract: A fluid bed electrolysis system and process are provided for efficiently removing electroplatable metal ions from an electrolyte, the system utilizing a cell having an axially disposed anode surrounded by a cathode, the anode being partitioned from the cathode by a porous diaphragm. The porous diaphragm defines an anode chamber surrounded by an annular cathode chamber, the annular cathode chamber being adapted to support a fluidizable cathode bed of electrically conductive particulate material, the system having electrolyte circulating means for recirculating electrolyte through said cell and for maintaining said electrically conductive particulate material in an electrochemically active fluidized state, including means for disengaging gas bubbles from said circulated solution formed during electrolysis.

Abstract: A fluid bed electrolysis cell and system are provided for efficiently extracting electroplatable metal ions from an electrolyte, the cell employed having preferably a plurality of anodes and cathodes concentrically disposed relative to each other, each of the anodes being partitioned from each of the cathodes by a porous diaphragm such as to define a plurality of anode chambers and cathode chambers. Each of the cathode chambers are adapted to support a fluidizable cathode bed of electrically conductive particulate material, e.g., powdered nickel, copper, and the like.