Abstract:
LIQUOR CONTAINING ELECTROCOATING PAINT OR DISPERSED BINDER THEREFOR CAN BE PROCESSED FOR SEPARATION OF COMPONENTS IN A CELL BY THE IMPROVEMENT WHICH COMPRISES MAINTAINING OPPOSED ELECTRODES THEREIN SUPPLIED WITH D.C. CURRENT FLOW AT A CURRENT DESITY IN EXCESS OF THAT WHICH WILL INITIATE ELECTRODEPOSITION ON ONE OF THE ELECTRODES UNDER SUBSTANTIALLY QUIESCENT CELL CONDITIONS; THESE ELECTRODES ARE GROSSLY POROUS, E.G., PADS OF METAL TURNINGS, AND INTERPOSED BETWEEN THEM IS AN ELECTRICALLY NONCONDUCTIVE TURBULENCE ARRESTER, ALSO GROSSLY PERMEABLE TO SAID LIQUOR; THE ELECTRODE WHICH IS SUBJECT TO ELECTRODEPOSITION IS SUPPLIED WITH A RECIRCULATING FLOW OF LIQUOR THROUGH IT SUFFICIENTLY HIGH TO MAINTAIN SUBSTANTIALLY UNATTENUATED ELECTRIC CURRENT FLOW BETWEEN THE ELECTRODES; THE CELL PREFERABLY IS FED BETWEEN THE TURBULENCE ARRESTER AND THE DEPOSITION ELECTRODE; LIQUOR ENRICHED AS TO BINDER IS WITHDRAWN FROM A COLLECTION CHAMBER COMMUNICATING WITH THE DEPOSITION ELECTRODE; LIQUOR DEPLETED IN SUCH BINDER IS WITHDRAWN FROM A CHAMBER COMMUNICATING WITH THE OPPOSITE ELECTRODE. APPARATUS FOR SUCH PROCESS IS SHOWN.
Abstract:
An improvement is shown in cell process and apparatus for the electrolytic separation of components from electricallyconductive liquor containing dispersed ionizable material electrodepositable on a deposition electrode to build substantial electrical resistance thereon and dissolved ionizing agent therefor, e.g., an aqueous dispersion of electrocoating paint. A primary electrode, charged from an external source, is maintained at each electrical extremity of a body of the liquor, and at least one secondary electrode pervious to ions of the liquor is interposed between the primary electrodes. The secondary electrodes compartment the body into a plurality of zones communicating with each other through such secondary electrodes. Electrical potential between the primary electrodes is applied with the potential between adjacent electrode pairs insufficient for causing electrodeposition on any of the secondary electrodes. An anolyte-enriched liquid and a catholyte-enriched liquid concentrate at the extreme compartments. If desired, the primary electrode opposite the deposition electrode also can be made porous for percolation of electrolyte solution through such primary electrode. Additionally, the deposition electrode can be made porous, and operated for electrodeposition of said ionizable material with the passage of same through such deposition electrode.
Abstract:
The conformation of the apparatus is broadly that of a shell-and-tube heat exchanger that can be of the single pass or multipass variety, and it can have substantially straight or bent tubes, including tubes with return bends. However, in this apparatus tubes are electrodes, and they are microporous. Electrode means of polarity opposite the tubes are provided; e.g., in the form of one or more charged heads or elements between such head or heads and the tube ends proximate thereto. Preferably the counter electrodes actually extend into the tubes. Appropriate fluid inlets and outlets and electrical terminals are provided.