| Patents for C22B 17 - Obtaining cadmium (340) |
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| 01/19/1988 | US4720373 Solids refining apparatus |
| 09/01/1987 | US4690725 Purification of Cd and Te by zone refining |
| 06/23/1987 | US4675048 Electrothermal process and plant for the separation and refining of metal from waste |
| 04/07/1987 | US4655928 Recycling |
| 02/04/1987 | EP0210387A1 Selective removal of metals from aqueous solutions with dithiophosphinic acids |
| 01/14/1987 | EP0208644A1 Electrothermal process for the separation and refining of metals starting from recuperation products |
| 11/06/1986 | EP0159349A4 Processes for treating waste streams. |
| 04/22/1986 | US4584054 Solids refining process |
| 02/04/1986 | CA1200106A1 Process for the recovery of metals from the scrap from nickel-cadmium accumulators |
| 01/14/1986 | US4564387 Wet zinc dust atomization and distribution |
| 10/30/1985 | EP0159349A1 Processes for treating waste streams |
| 08/27/1985 | CA1192362A1 Wet zinc dust atomization and distribution |
| 04/25/1985 | WO1985001670A1 Processes for treating waste streams |
| 02/19/1985 | US4500396 Copper recovery process |
| 10/09/1984 | US4475993 Extraction of trace metals from fly ash |
| 06/26/1984 | CA1169662A1 Method for recovering useful metals from dust discharged from metal refining metallurgical furnace |
| 08/30/1983 | US4401463 Process for the recovery of metals from the scrap from nickel-cadmium electric storage batteries |
| 08/02/1983 | US4396424 Utilizing heat obtained by reoxidizing the ferrous oxide |
| 08/02/1983 | CA1150953A1 Liquid-liquid extraction of metal values from aqueous solution |
| 04/06/1983 | EP0075978A2 Process for the recovery of metals from the scrap from nickel-cadmium electric storage batteries |
| 04/27/1982 | US4326884 Reducing using combustion gases |
| 04/06/1982 | US4323391 Process for recovering zinc |
| 11/24/1981 | CA1112880A1 Hydrometallurgical process for the treatment of oxides and ferrites which contain iron and other metals |
| 09/08/1981 | CA1108376A1 Method of removal of arsenic from a sulfuric acid solution |
| 07/21/1981 | CA1105266A1 Process and apparatus for recovering zinc |
| 04/08/1981 | EP0026560A1 Boiler for molten metals and a method of boiling and refining a molten metal |
| 02/04/1981 | EP0023428A1 Liquid-liquid process for extracting metals using organo-phosphorous compounds |
| 12/30/1980 | CA1092365A1 Refining of ferrous and base metal sulphide ores and concentrates |
| 12/23/1980 | US4241039 Oxidation, precipitation of ferric hydroxide |
| 08/26/1980 | US4219354 Hydrometallurgical process for the treatment of oxides and ferrites which contain iron and other metals |
| 10/30/1979 | US4172784 Process for the separation of cadmium (Cd++)-ions from sewage, waste water and aqueous solutions |
| 09/25/1979 | US4168970 Cementation with a zinc dust and an antimony and/or arsenic compound |
| 04/10/1979 | US4148698 Refining of ferrous and base metal sulphide ores and concentrates |
| 10/24/1978 | CA1040868A1 Process for recovery of valuable metals from solution using neutralization by lime or limestone |
| 03/07/1978 | US4077799 Method and apparatus of refining crude cadmium |
| 10/11/1977 | US4053553 Method for selective recovery of cadmium from cadmium-bearing waste |
| 03/08/1977 | US4010937 Method and apparatus of refining crude cadmium |
| 12/21/1976 | US3998627 Process for recovering metals from metal ammine bearing ammonium salt solutions using ion exchange resin |
| 05/25/1976 | US3959437 Hydrometallurgical process for the recovery of zinc, copper and cadmium from their ferrites |
| 05/04/1976 | US3954452 Polyacrylamide flocculant |