Patent ID: 7732503

Claim:
A process for recycling a molded coil of a molded transformer for receiving and distributing high-voltage power, comprising the steps of: using the molded coil of the molded transformer, which contains a hardened epoxy resin and an electroconductive material, as an object to be treated; treating the molded coil of the molded transformer with a treating solution containing a solvent and at least one species of a metallic salt as the catalyst, to dissolve the hardened epoxy resin; and recovering a filler contained in the epoxy resin and the electroconductive material, wherein treating the molded coil comprises: dismantling the molded transformer to obtain a core, a clasp, a primary terminal, a secondary terminal, and the molded coil, wherein the molded coil is selectively recovered; subjecting the molded coil, the catalyst, and the solvent to a drying/dehydrating treatment including drying the molded coil in a furnace at a temperature of 105° C. for one hour to attain a water content of 0.5% or less; putting the molded coil, the solvent, the catalyst, and a desiccating agent into a dissolution processing tank for a dissolution treatment; heating the dissolution processing tank to heat and stabilize the solvent at a treatment temperature while injecting nitrogen gas at a rate of 0.2L per minute to dissolve the epoxy resin of the molded coil; and upon completion of the dissolution treatment and after the treating solution is cooled to a temperature of ≦50° C.: transferring the treating solution to a management tank and then to a receiver container, the treating solution including the filler dissolved within; withdrawing from the dissolution processing tank components which remain undissolved; and washing the undissolved components to recover glass fibers and a coil of the electroconductive material.