Metals Technology Development Company LLC

David Michael Olkkonen

Massimo Giuseppe Maccagni

William Leonard Lane

Timothy Roy Hymer

Jonathan Hylkjier Nielsen

Jonathan Hylkjier Nielson

A process for recovering non-ferrous metals from a solid matrix may include: (a) leaching the solid matrix with an aqueous-based solution containing chloride ions, ammonium ions, and Cuions, having a pH of 6.5-8.5, in a presence of oxygen, at a temperature of 100&#xb0; C.-160&#xb0; C. and a pressure of 150 kPa-800 kPa, so as to obtain an extraction solution comprising leached metals and solid leaching residue; (b) separating the solid leaching residue from the extraction solution; and/or (c) subjecting the extraction solution to at least one cementation so as to recover the leached metals in elemental state. The pH may be greater than or equal to 6.5 and less than or equal to 8.5. Temperature may be greater than or equal to 100&#xb0; C. and less than or equal to 160&#xb0; C. Pressure may be greater than or equal to 150 kPa and less than or equal to 800 kPa.

Processes for recovering non-ferrous metals from solid matrices

A process for recovering non-ferrous metals from a solid matrix may include: leaching the solid matrix with an aqueous-based solution, in a presence of oxygen, to obtain an extraction solution including leached metals and solid leaching residue; separating the solid leaching residue from the extraction solution; and subjecting the extraction solution to at least one cementation to recover the leached metals in elemental state. The leaching solution may include chloride ions. The leaching solution may further include ammonium ions. A pH of the leaching solution may be greater than or equal to 6.5 and less than or equal to 8.5. A leaching temperature may be greater than or equal to 100&#xb0; C. and less than or equal to 160&#xb0; C. A leaching pressure may be greater than or equal to 150 kPa and less than or equal to 800 kPa.

A system for recovering lead from lead-bearing materials by circulating an aqueous solution of ferric fluoroborate in fluoroboric acid through a leaching vessel to leach lead from the lead-bearing material and an electrolytic cell for recovering the lead includes a cooler for cooling at least a portion of the circulating solution sufficiently to precipitate alkali salts and alkali-earth salts, and a filter for removing the precipitated salts from the solution. A process for recovering lead from lead-bearing materials by leaching the lead from the lead-bearing material with a solution of ferric fluoroborate in fluoroboric acid and recovering the lead from the solution includes cooling at least a portion of the circulating solution sufficiently to precipitate alkali salts and alkali-earth salts, and filtering the salts from the solution.

Growing community of inventors

Viburnum, MO, United States of America

David Michael Olkkonen