| Patents for C22B 3 - Extraction of metal compounds from ores or concentrates by wet processes (16,429) |
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| 11/30/1994 | CN1095766A Method for prepn. of ZnO and Mn carbonate by extraction of Zn sulfide ore and pyrolusite in one trough |
| 11/29/1994 | US5368632 Redox polymer films for metal recovery applications |
| 11/24/1994 | WO1994026943A1 Process for removing, separating, and concentrating metals |
| 11/23/1994 | CN1095422A Gold-silver wet seperation technology with gold |
| 11/22/1994 | US5366998 Composition for removing adhesives from polymeric film and process for using same |
| 11/22/1994 | US5366715 Method for selectively removing antimony and bismuth from sulphuric acid solutions |
| 11/22/1994 | US5366612 Process for making copper foil |
| 11/22/1994 | US5366599 Recovering copper, leaching with copper/II/ amine complex, electrowinning |
| 11/16/1994 | CN1095111A Rare earth electrolytic extracting process |
| 11/16/1994 | CN1095110A Method for directly producing cupric sulfate by cupric oxide ore |
| 11/15/1994 | US5364786 Pure culture of Agrobacterium sp. which degrades ferric chelates |
| 11/15/1994 | US5364453 Method for recovering gold and other precious metals from carbonaceous ores |
| 11/15/1994 | US5364452 Chemical process for the recovery of metal from an organic complex |
| 11/15/1994 | US5364445 Recovery method of rhodium |
| 11/15/1994 | US5364444 Metal leaching and recovery process |
| 11/15/1994 | CA1333107C Process for the detoxification of effluents from ore processing operations with hydrogen peroxide, using a magnetic pre-separation stage |
| 11/10/1994 | WO1994025633A1 Method of dissolving and recovering metal |
| 11/10/1994 | WO1994025632A1 Recovery of metals from sulphidic material |
| 11/02/1994 | EP0658215A4 Extraction or recovery of metal values. |
| 10/27/1994 | WO1994024338A1 Process for making copper foil |
| 10/27/1994 | WO1994024334A1 Process for making copper metal powder, copper oxides and copper foil |
| 10/26/1994 | EP0601027A4 Titanium extraction. |
| 10/26/1994 | CN1094014A Process for producing copper sulfate from copper pyrite directly |
| 10/26/1994 | CN1026335C Wet process for recovering copper from copper ores |
| 10/25/1994 | US5358700 Method of extracting zinc from brines |
| 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 |
| 10/20/1994 | DE4312906A1 Process for dissolving metals out of solids |
| 10/19/1994 | EP0619764A1 Process for removing heavy metals from soils. |
| 10/19/1994 | CN1093755A Safety dearsenicating technology for high-arsenic material |
| 10/19/1994 | CN1026215C Technology for preparation of magnetic active carbon |
| 10/18/1994 | US5356538 Supercritical fluid extraction |
| 10/13/1994 | WO1994023075A1 Recovery of cerium from fluoride-containing ores |
| 10/12/1994 | CN1093418A Prodn. of zinc by complex compound electrolysis |
| 10/12/1994 | CN1093414A Dissolving extraction method for concentrated phase of wet processing metallurgic material |
| 10/11/1994 | US5354688 Anaerobic microbial remobilization of coprecipitated metals |
| 10/11/1994 | US5354359 Hydrometallurgical process for the recovery of precious metal values from precious metal ores with thiosulfate lixiviant |
| 10/11/1994 | US5354357 Removal of mercury from process streams |
| 10/05/1994 | CN1093115A Recovery of cerium from fluoride-containing ores |
| 10/05/1994 | CN1093114A Ionic speed-controlling shower soaking technology for rare-earth mineral and its equipment |
| 09/29/1994 | WO1994021830A1 Recovery of zinc, iron, lead and silver values from zinc sulphide concentrate by a multi-stage pressure oxidation process |
| 09/29/1994 | WO1994021345A1 Removing toxic metals from solutions |
| 09/29/1994 | CA2157923A1 Process for the removal of toxic cyanide and heavy metal species from alkaline solutions |
| 09/28/1994 | EP0617135A1 The production of cadmium |
| 09/28/1994 | CN1026016C Process for extracting scandium from ore |
| 09/27/1994 | US5350517 Method of recycling phosphating sludges |
| 09/27/1994 | CA2120038A1 Production of cadmium |
| 09/27/1994 | CA1332109C Extraction of gallium from bayer liquor with a soaked adsorbing resin |
| 09/21/1994 | CN1092383A Tech. for preparing lead salt from galena |
| 09/20/1994 | US5348712 Use of carbonates in metal ion extraction |
| 09/14/1994 | EP0557274B1 Recovery of palladium |
| 09/14/1994 | CN1092111A New process for extracting copper from underground water of copper mine |
| 09/14/1994 | CN1025922C Method for separation of gold and silver |
| 09/14/1994 | CN1025921C Method for producing silver nitrate and reclaiming copper lead and antimony from lead anode mud |
| 09/07/1994 | EP0476078B1 Extraction and recovery of gold |
| 09/06/1994 | US5344625 Lignin or tannin derivatives |
| 09/06/1994 | US5344567 Recovery of indium by solvent extraction using trialkylphosphine oxides |
| 09/06/1994 | US5344479 Leaching with sulfuric acid, oxidation |
| 09/06/1994 | CA2001173C Relating to the recovery of silver |
| 09/05/1994 | EP0662158A4 Zirconium extraction. |
| 09/01/1994 | WO1994019501A1 Process for the treatment of electric arc furnace dust |
| 09/01/1994 | WO1994019500A1 Recovery of zinc values from a solution containing hydrocyanic acid |
| 08/30/1994 | US5342937 Heterocyclic thione |
| 08/30/1994 | US5342526 Solvent extraction using dialkylthietane |
| 08/30/1994 | US5342449 Classifying soil aggregate, dissolving metals in aqueous solution of organic acid |
| 08/26/1994 | CA2090348A1 Recovery of zinc values from a solution containing hydrocyanic acid |
| 08/24/1994 | CN1091157A Production of metal from minerals |
| 08/23/1994 | US5340380 Using ion exchange resin with guanidine funcionality, eluting with caustic containing acid salt modifiers; gold and silver |
| 08/23/1994 | CA1331515C Recovery of silver from photo sensitive materials |
| 08/16/1994 | US5338520 Recovery of neodymium/didymium values from bastnaesite ores |
| 08/16/1994 | US5338338 Improved leaching, pre-robbingly concentrating gold complex on ore, flotation, separation |
| 08/16/1994 | CA1331492C Common separation of contaminating elements from electrolyte solutions of valuable metals |
| 08/10/1994 | CN1090604A Method for extracting noble metal and value able metal from tin anode mud |
| 08/10/1994 | CN1090553A Method for enriching titanium dioxide by using titanium ore as raw material |
| 08/09/1994 | US5336297 Process for the treatment of electric arc furnace dust |
| 08/04/1994 | WO1994017530A1 Selective separation of caesium using crown ethers |
| 08/04/1994 | WO1994017216A1 Hydrometallurgical recovery of metals from complex ores |
| 08/03/1994 | CN1025570C Process for extracting high purity Eu by reduction-extraction |
| 08/03/1994 | CN1025556C Solvent extraction process |
| 07/27/1994 | CN1089919A Iron-removing method used in course of aluminum sulfate production |
| 07/26/1994 | US5332559 Hydrometallurgy |
| 07/26/1994 | US5332531 Complexing |
| 07/26/1994 | US5332420 Chemical process of separating metals from an organic complex |
| 07/20/1994 | CN1089661A Description of related art |
| 07/19/1994 | US5330731 Process for separation of zirconium-88, rubidium-83 and yttrium-88 |
| 07/12/1994 | US5328669 Extraction of precious metals from ores and other precious metal containing materials using halogen salts |
| 07/12/1994 | US5328626 Extraction of metals from aqueous solutions |
| 07/12/1994 | CA1330627C Process for the extraction of valuable metals |
| 07/06/1994 | CN2170800Y 离心反应器 Centrifugal reactor |
| 07/06/1994 | CN1088992A A method for recovering gold and other precious metals from carbonaceous ores |
| 07/06/1994 | CN1088991A Process for control of Mn and Zn contamination from hydrometallurgy of Mn and Zn by pressurization or depressurization |
| 06/29/1994 | CN1088544A Regeneration of hydrochloric acid |
| 06/29/1994 | CN1088485A Aminolkylphosphonic acid containing ligands attached to solid supports for removal of metalions. |
| 06/29/1994 | CN1025222C Method for prepn. of fluorescence grade europium sesquioxide |
| 06/28/1994 | US5324851 Recovery of palladium catalyst |
| 06/28/1994 | US5324496 Recovering abrasive grit by dissolving metal in nitric acid medium in closed container with oxidizing atmosphere |
| 06/23/1994 | WO1994013845A1 Process for extracting rare-earth elements from phosphate ore |
| 06/22/1994 | CN1088269A Recovery method of rhodium |
| 06/22/1994 | CN1088267A Method for producing cupric sulfate from lowgrade oxide copper ore |
| 06/22/1994 | CN1088266A Method and apparatus for leaching and recoverying copper, silver, gold, lead, iron and sulphur from sulphuretted copper ore |
| 06/22/1994 | CN1088132A Ion-exchange recovery method of cobalt and manganese ions in acetate solution |