| Patents for C22B 47 - Obtaining manganese (857) |
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| 05/20/1999 | DE19852764A1 High purity manganese is produced by vacuum distilling molten crude manganese |
| 05/05/1999 | CN1215761A Method for recovery of Co-Mn metal from p-phthalic acid residual liquid |
| 04/21/1999 | CN1043013C Iron-exchange recovery method of cobalt and manganese ions in acetate solution |
| 03/25/1999 | WO1999014403A1 Process for making manganese |
| 02/25/1999 | WO1999009226A1 Chloride assisted hydrometallurgical extraction of nickel and cobalt from sulphide or laterite ores |
| 02/25/1999 | WO1999009225A1 Chloride assisted hydrometallurgical extraction of copper from sulphide ore materials |
| 02/11/1999 | WO1999006603A1 Selective precipitation of nickel and cobalt |
| 12/30/1998 | EP0792247A4 Metal and fluorine values recovery from mineral ore treatment |
| 12/23/1998 | CN1202528A Method and apparatus for sintering finely divided material |
| 10/29/1998 | DE19816410A1 Method and apparatus for the sintering of a finely divided material containing manganese compounds |
| 08/27/1998 | WO1998037022A1 Treatment of a solution containing iron salts |
| 06/02/1998 | US5759229 Method for recovering cobalt/manganese/bromine values from residue containing used catalyst |
| 09/03/1997 | EP0792247A1 Metal and fluorine values recovery from mineral ore treatment |
| 09/04/1996 | EP0729437A1 Metal and fluorine values recovery from mineral ore treatment |
| 08/28/1996 | CN1032657C Controlling pollution method for wet process of smelting Mn or Zn by increasing or decreasing pressure |
| 08/27/1996 | CA2078166C Process for the reduction roasting of manganese ores and a device therefor |
| 07/09/1996 | US5534234 Recovery of manganese from leach solutions |
| 07/02/1996 | US5531970 Calcium fluoride sediments, complexing, reacting with acid, separating primary values of ta and nb from secondary values of u or th, solubilizing |
| 05/30/1996 | WO1996015987A1 Metal and fluorine values recovery from mineral ore treatment |
| 05/30/1996 | CA2205482A1 Metal and fluorine values recovery from mineral ore treatment |
| 05/15/1996 | CA2162820A1 Recovery of manganese from leach solutions |
| 04/17/1996 | EP0613587B1 Method of processing used batteries |
| 04/17/1996 | CN1120692A Keys arrangement of Chinese character basic strokes input method |
| 03/05/1996 | US5496526 Crushing, heat treating, cooling, fine crushing and grinding ore, and magnetically separating artificial manganese-iron spinel from silicon and other oxides in ore |
| 10/31/1995 | CA1337456C Method of smelting metal oxide material |
| 10/26/1995 | WO1995028504A1 Method of extracting manganese from manganese-containing raw material |
| 10/17/1995 | US5458990 Method of processing used batteries |
| 08/15/1995 | US5441641 Process for removing manganese from solutions including aqueous industrial waste |
| 05/26/1995 | WO1995013985A1 Metal and fluorine values recovery from mineral ore treatment |
| 05/26/1995 | CA2175912A1 Metal and fluorine values recovery from mineral ore treatment |
| 02/28/1995 | US5393320 Leaching process for nickel cobalt and manganese ores |
| 01/31/1995 | US5385713 Contacting liquor with base to adjust pH, contacting at elevated temperature with aluminum hydroxide or aluminum sulfate |
| 01/24/1995 | US5384105 Radioactive, acid digestion |
| 10/25/1994 | US5358699 Isolation of gold, silver and/or platinum by oxidation using lignins or tannins containing ortho-quinones or catechol as oxidation promoters before treatment with other chemicals |
| 09/07/1994 | EP0613587A1 Method of processing used batteries. |
| 09/06/1994 | US5344625 Lignin or tannin derivatives |
| 07/06/1994 | CN1088991A Process for control of Mn and Zn contamination from hydrometallurgy of Mn and Zn by pressurization or depressurization |
| 06/22/1994 | CN1088132A Ion-exchange recovery method of cobalt and manganese ions in acetate solution |
| 04/07/1994 | DE4301042C1 Treatment the sludge obtained from zinc leachant - to recover zinc, iron and manganese |
| 03/23/1994 | EP0587947A1 A process for the reduction roasting of manganese ores and a device therefor |
| 01/18/1994 | US5279803 Precious metal recovery process from carbonaceous ores |
| 01/18/1994 | US5279802 Oxidation of metal sulfide at alkaline pH; complexing |
| 12/28/1993 | US5273725 Concentrating radionuclide products by digesting with an aqueous solution of boric acid and a mineral acid; using a cation reactant to precipitate fluoride compounds |
| 12/14/1993 | US5270022 Process for the reduction roasting of manganese ores and a device therefor |
| 09/07/1993 | CA1322034C Bidirectional control signalling bus interface apparatus for transmitting signals between two bus systems |
| 06/23/1993 | EP0547744A1 Process for recovering metal from oxide ores |
| 06/10/1993 | WO1993011573A1 Method of processing used batteries |
| 06/02/1993 | CN1021038C Method for producing soluble silicate from bio-silicon dioxide |
| 04/06/1993 | US5200159 Purified solution containing iron and manganese, and method producing thereof |
| 07/01/1992 | CN1017286B Bidifectional control signalling bus interface apparatus for transmitting signals between two bus system |
| 03/12/1992 | DE4028267A1 Ferromanganese prodn. from manganese ore concentrates - by pre-reducing in fluidised bed melting device followed by final reducing in electro-furnace |
| 08/21/1991 | CN1013588B Process for utilizing rich iron but poor manganese ore |
| 07/16/1991 | US5032367 Method for producing powdered iron oxide |
| 05/15/1991 | EP0427710A1 Smelting reduction |
| 01/29/1991 | US4988487 Demetallization, reduction, leaching, digestion, precipitation, oxidation |
| 07/24/1990 | US4943418 Method of preparing high-purity manganese compounds |
| 06/05/1990 | US4932040 Bidirectional control signalling bus interface apparatus for transmitting signals between two bus systems |
| 05/09/1990 | EP0366834A2 Method for producing powdered iron oxide |
| 04/25/1990 | EP0364904A2 Purified solution containing iron and manganese, and method producing thereof |
| 03/06/1990 | US4906293 Hydrometallurgical process for extracting metals from ocean-mined ferromanganese nodules |
| 03/06/1990 | CA1266368A1 Process of reducing higher metal oxides to lower metal oxides |
| 02/28/1990 | CN1040058A Process for utlizing rich iron but poor manganese ore |
| 10/18/1989 | CN1036466A Bidifectional control signalling bus interface apparatus for transmitting signals between two bus system |
| 10/10/1989 | US4872909 Solubilizing and recovery of manganese, cobalt, nickel from marine nodules and crusts |
| 06/14/1989 | EP0319663A2 Bidirectional control signalling bus interface apparatus for transmitting signals between two bus system |
| 04/19/1989 | CN1032429A Production of soluble sillicates from biogenetic silics |
| 02/28/1989 | US4808384 Acid digestion, reduction, separation, extraction, stripping; precipitating impurities |
| 02/01/1989 | EP0301857A2 Production of soluble silicates from biogenetic silica |
| 12/06/1988 | US4789580 Process of reducing higher metal oxides to lower metal oxides |
| 11/29/1988 | CA1245458A1 Process for the treatment of complex manganese ores, such as marine nodules |
| 08/23/1988 | US4765827 Metal value recovery |
| 08/09/1988 | US4762694 Molten salt extraction process for the recovery of valued transition metals from land-based and deep-sea minerals |
| 05/11/1988 | EP0266975A1 Smelting reduction |
| 04/26/1988 | US4740239 Controlled reduction in rotary kiln |
| 03/31/1988 | DE3632660A1 Integrated process for preparing oxidants (oxidizing agents) containing manganese and/or zinc compounds |
| 01/12/1988 | US4718996 Recovery of tungsten, scandium, iron, and manganese values from tungsten bearing material |
| 01/12/1988 | US4718995 Recovery of tungsten, scandium, iron, and manganese from tungsten bearing material |
| 10/20/1987 | US4701217 Smelting reduction |
| 08/04/1987 | US4684403 Dephosphorization process for manganese-containing alloys |
| 07/14/1987 | US4680098 Electrodialysis |
| 05/20/1987 | EP0222452A1 Process for reducing the oxidation level of metallic oxides |
| 01/14/1987 | EP0040243B1 Process and apparatus for producing metals at porous hydrophobic catalytic barriers |
| 12/04/1986 | WO1986007097A1 Metal halide reduction with molten sodium/potassium alloy |
| 12/02/1986 | US4626280 Recovery of tungsten, scandium, iron, and manganese from tungsten bearing material |
| 11/25/1986 | US4624703 Recovery of tungsten, scandium, iron, and manganese values from tungsten bearing material |
| 11/04/1986 | US4620964 Process for the treatment of complex manganese ores, such as marine nodules |
| 07/15/1986 | US4600565 Leaching o-es, ammonium sulfate, ammonium nitrate |
| 03/18/1986 | US4576638 Imanganese ore, coal, slag-formers, rotarty kiln, carbon monoxide |
| 03/10/1986 | CN85103874A Method of catalytic leaching manganese oxide ore |
| 12/18/1985 | EP0165166A1 Process for treating complex manganese ores such as marine nodules |
| 11/06/1985 | EP0160171A2 Process for the preparation of ammonium salt containing manganese (II) salt solutions |
| 10/22/1985 | US4548684 Treatment of manganese nodules |
| 10/08/1985 | US4545816 Processes relating to the extraction of metals from laterites and ocean manganese nodules |
| 09/17/1985 | CA1193448A1 Hydrometallurgical process for the recovery of valuable metals from sulfidic, silicate-containing raw materials |
| 07/09/1985 | US4528167 Selective solvent extraction using organophosphorus and carboxylic acids and a non-chelating aldehyde oxime |
| 07/09/1985 | CA1190048A1 Selective solvent extraction using organophosphorus and carboxylic acids |
| 04/16/1985 | US4511540 Exploitation of copper, nickel and cobalt by treating manganiferous matrix oxidized ores |
| 03/12/1985 | US4504310 Process for the production of high purity metals or alloys |
| 01/15/1985 | CA1180904A1 Process for the exploitation of low-grade oxidic and iron-bearing complex ores or concentrates |
| 12/25/1984 | US4490297 Solubilizing salt by joint action of hydrogen bromide, acetic anhydride and acetyl bromide |