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Dreisinger
David Dreisinger, Delta, BC CA
| Patent application number | Description | Published |
|---|---|---|
| 20100206135 | RECYCLING OF SOLIDS IN OXIDATIVE PRESSURE LEACHING OF METALS USING HALIDE IONS - The invention provides a recycling step in an oxidative pressure leaching process for recovery of metals using halide ions, in which a portion of the leached solids are recycled back to the feed to the autoclave, to allow two or more passes through the high temperature leaching step. | 08-19-2010 |
David B. Dreisinger, Delta CA
| Patent application number | Description | Published |
|---|---|---|
| 20100018351 | RECYCLING OF SOLIDS IN OXIDATIVE PRESSURE LEACHING OF METALS USING HALIDE IONS - The invention provides a recycling step in an oxidative pressure leaching process for recovery of metals using halide ions, in which a portion of the leached solids are recycled back to the feed to the autoclave, to allow two or more passes through the high temperature leaching step. | 01-28-2010 |
David Bruce Dreisinger, Ladner CA
| Patent application number | Description | Published |
|---|---|---|
| 20110030508 | Process for Metal Seperation Using Resin-in-Pulp or Resin-in-Solution Processes - A process for the treatment of solutions or slurries containing dissolved metals comprises the steps of (a) contacting the solution or slurry with an ion exchange resin that selectively removes one or more dissolved metals from the solution or slurry wherein the solution or slurry and the resin are introduced into a vessel or column via sub-surface means, (b) separating loaded resin from the solution or slurry, (c) eluting the one or more metals from the loaded resin with an eluting agent, (d) separating the eluting solution containing eluted metal ions from the resin; and (e) transferring regenerated resin from step (d) back to step (a). | 02-10-2011 |
David Bruce Dreisinger, Delta CA
| Patent application number | Description | Published |
|---|---|---|
| 20080206127 | Iron Oxide Precipitaion from Acidic Iron Salt Solutions - Improved methods for treating metallurgical compositions involve reacting a metallurgical composition with an aqueous nitric acid solution. The reaction is performed at a pressure or at least about 220 psig and at a temperature of at least 100° C. The metallurgical composition comprises iron and one or more non-ferrous metals. The reaction dissolves at least a portion of the non-ferrous metal compositions into the solution which is in contact with solid ferric oxide. The reaction can be repeated on the isolated solids to increase the purity of ferric oxide in the solids. Zinc can be removed from mixed metal solutions obtained from furnace dust by adding base to precipitate zinc hydroxide. | 08-28-2008 |