| Patents for C01G 9 - Compounds of zinc (4,420) |
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| 04/04/1989 | US4818503 Extraction process for removing and recovering metals from aqueous solutions |
| 04/04/1989 | CA1252097A1 Process for the extraction of metal values using hydrocyclic compounds containing two nitrogen hetero-atoms and metal extractants |
| 03/15/1989 | EP0306973A2 Manufacturing method for superconducting ceramics and products thereof |
| 02/28/1989 | US4808398 Narrow size distribution zinc oxide |
| 02/28/1989 | CA1250411A1 System for dissolution-purification of zn-containing materials |
| 02/21/1989 | CA1250210A1 Process for the treatment of iron- and zinc- containing hydrochloric acid pickles |
| 02/08/1989 | EP0302368A2 Process for the production of sinterable powders for binary and multinary ceramic oxidic materials |
| 02/01/1989 | EP0301783A2 Method for the recovery of metals from chloride solutions |
| 02/01/1989 | CN1030794A Zinc sulfate preparing method using high-silicon zinc oxide ore |
| 01/31/1989 | CA1249413A1 Process for purifying solutions of zinc sulphate |
| 01/24/1989 | US4800069 Haliding a metal ferrite |
| 12/28/1988 | CN88102610A Production technology of zink oxide from smithsonite |
| 12/21/1988 | EP0296148A1 Process for the preparation of a mixture of zinc sulfate hydrate containing hexahydrate and heptahydrate which can be conserved |
| 12/15/1988 | DE3819020A1 Method for adjusting the amount of zinc powder when removing impurities from zinc sulphate solutions |
| 12/14/1988 | EP0294387A1 Method and apparatus for biological processing of metal-containing ores. |
| 12/06/1988 | US4789529 Recovery of zinc from zinc bearing sulphidic ores and concentrates by controlled oxidation roasting |
| 11/29/1988 | CA1245461A1 Precipitation of iron from sulphate solutions |
| 11/09/1988 | EP0289953A2 Rust-proofing agent, rustproofing coating composition and coating method for preventing or inhibiting corrosion of metallic surface |
| 11/09/1988 | EP0289582A1 Method for preparing a metal oxide varistor precursor powder. |
| 11/08/1988 | CA1244246A1 Extraction process for removing and recovering metals from aqueous solutions |
| 11/02/1988 | EP0288819A1 Process for the preparation of dialkyldithiocarbamates of polyvalent metals |
| 11/01/1988 | USRE32777 Chlorination, bromination or iodination of metal, fluorination |
| 10/19/1988 | EP0287218A1 Method of making photoconductive particles |
| 09/21/1988 | EP0282619A1 Filiform corrosion-resistant primer coating composition and method for preventing filiform corrosion |
| 08/23/1988 | CA1240900A1 Inorganic oxide aerogels and their preparation |
| 08/03/1988 | CN86108798A Prepn. of znso4 and active zno from zinc ore by entire wet-process |
| 08/02/1988 | US4761188 Coating with hydrotalcite solid solutions |
| 07/12/1988 | CA1239019A1 Solvent extraction process for recovery of zinc |
| 06/29/1988 | EP0272964A1 Manufacturing process of zinc oxide-doped powders by coprecipitation |
| 06/28/1988 | US4753740 Adding ammonium chloride or bromide or borate anion producing compound |
| 05/31/1988 | US4747957 Brine treatment using ethylene carboxylic acid polymers |
| 05/31/1988 | US4747954 Ethylene-unsaturated acid copolymer |
| 05/05/1988 | WO1988002921A3 Metal oxide varistors, precursor powder compositions and methods for preparing same |
| 04/27/1988 | CN86107218A New technology in preparation of zinc oxide from the filter residue of sodium hydrosulphite |
| 04/21/1988 | WO1988002921A2 Metal oxide varistors, precursor powder compositions and methods for preparing same |
| 04/19/1988 | US4739054 For metals |
| 04/06/1988 | EP0262964A2 Recovery of nickel or cobalt from solvent extraction strip solutions |
| 03/31/1988 | DE3632660A1 Integrated process for preparing oxidants (oxidizing agents) containing manganese and/or zinc compounds |
| 03/15/1988 | US4731187 Removal of heavy metals from waste water |
| 03/01/1988 | US4728682 Silfiding homogeneous mixture of nitrates |
| 02/24/1988 | EP0256741A2 Sulphur recovery process using metal oxide absorbent with reducing gas purge |
| 02/24/1988 | CN87204984U Device for producing indirect process zinc oxide |
| 02/09/1988 | US4724132 Cross-pipe reactor to provide extreme mixing and agitation |
| 02/02/1988 | USH429 Low temperature synthesis of metal sulfides |
| 01/26/1988 | US4721605 Selective removal of metals from aqueous solutions with dithiophosphinic acids |
| 01/20/1988 | CN87102881A Method for removal of monovalent ions from znso4 electrolyte by electrodialysis |
| 01/19/1988 | US4720373 Solids refining apparatus |
| 01/19/1988 | CA1231536A1 Hydrometallurgical method for treating valuable metal raw materials containing chlorides and fluorides |
| 01/05/1988 | US4717708 Inorganic oxide aerogels and their preparation |
| 12/29/1987 | US4715939 Zinc sulfate, semipermeable ion exchange membranes |
| 12/17/1987 | DE3619620A1 Process for preparing ceramic zinc oxide varistor material and use of the material prepared according to this process |
| 12/02/1987 | EP0247713A1 Method for the purification of zinc sulphate electrolyte |
| 11/05/1987 | DE3615027A1 Process for destroying organic halogen compounds, in particular chlorinated biphenyls, polychlorinated dioxins and polychlorinated furans |
| 10/06/1987 | US4698139 Hydrometallurgical method for treating valuable metal raw materials containing chlorides and fluorides |
| 09/29/1987 | US4696801 Process for the extraction of metal values with bisimidazole metal extractants |
| 09/29/1987 | CA1227321A1 Recovery of anhydrous zinc chloride |
| 09/16/1987 | EP0237081A2 Process for the preparation of complex perovskite type compounds |
| 08/25/1987 | US4689146 Ion exchanging for separating heavy metal precipitation; ion separation |
| 08/25/1987 | CA1225817A1 Ammonium chloride-ammonium hydroxide strip for the recovery of anhydrous zinc chloride |
| 08/13/1987 | WO1987004694A1 Method and apparatus for biological processing of metal-containing ores |
| 07/21/1987 | US4681717 Process for the chemical preparation of high-field ZnO varistors |
| 07/08/1987 | EP0227893A2 Method of removing metal contaminants from solutions |
| 06/30/1987 | US4676969 Method of synthesis of inorganic chalcogenides |
| 06/30/1987 | US4676828 Process for the leaching of sulphides containing zinc and iron |
| 06/23/1987 | US4675172 Copper, cadmium, cobalt, zinc |
| 06/23/1987 | CA1223126A1 Process for recovering zinc from ferrites |
| 06/02/1987 | US4670230 Using alkyl phosphoric acid compound and petroleum hydrocarbon diluent |
| 04/28/1987 | US4661634 Filtration through porous polymer particles in fiber form |
| 03/24/1987 | US4652438 Chemical vapor purification of fluorides |
| 02/25/1987 | EP0211305A2 Metal scavenging process |
| 02/04/1987 | EP0210387A1 Selective removal of metals from aqueous solutions with dithiophosphinic acids |
| 01/20/1987 | US4637832 Process for purifying solutions of zinc sulphate |
| 01/06/1987 | US4634507 Process for the production of lead from sulphide ores |
| 12/23/1986 | US4631176 Zinc chloride ammine precipitate, decomposing and electrolysis to elemental zinc |
| 12/02/1986 | CA1214650A1 Process for the recovery of cadmium and other metals from solution |
| 11/25/1986 | US4624704 Selective recovery of zinc from metal containing brines |
| 11/12/1986 | CA1213735A1 Chlorination of copper, lead, zinc, iron, silver and gold |
| 10/28/1986 | US4619908 Hydrolyzing metal compound and extracting solvent |
| 10/21/1986 | US4618428 Membrane-based solvent extraction of aqueous solutions |
| 10/21/1986 | CA1212873A1 Organometallic chemical vapour deposition of films |
| 10/01/1986 | EP0196153A2 Process for the extraction of metal values and novel metal extractants |
| 10/01/1986 | EP0195911A2 Zinc oxide particles with narrow size distribution |
| 09/09/1986 | US4610722 Process for metal recovery from steel plant dust |
| 09/03/1986 | EP0193307A2 Process for the extraction of metal values and novel metal extractants |
| 09/02/1986 | CA1210564A1 Process for defluorinating an acid sulphate solution |
| 08/19/1986 | US4606765 Process for treating zinc-laden dust issuing from electric steel plant furnaces |
| 08/19/1986 | CA1209785A1 Compositions |
| 07/16/1986 | EP0187325A2 Cooling system for neck ring and parison mold |
| 07/09/1986 | EP0186882A1 Solvent extraction process for recovery of zinc |
| 07/08/1986 | CA1207151A1 Process for selectively stripping iron ions from an organic solvent |
| 07/02/1986 | EP0186213A2 Method for synthesizing compound semiconductor polycrystals and apparatus therefor |
| 07/02/1986 | EP0186149A2 Non-aged inorganic oxide-containing aerogels and their preparation |
| 06/24/1986 | US4596698 Extractor for removing hydrogen sulfide from steam |
| 05/27/1986 | US4591489 Process for the treatment of hydrochloric acid pickles containing iron and zinc |
| 05/14/1986 | EP0180900A2 Process for the adjustment of the structure and/or surface characteristics of oxidized materials |
| 04/22/1986 | US4584054 Solids refining process |
| 04/08/1986 | US4581220 Cured residue of zirconium solution |
| 03/18/1986 | US4576815 Process for the extraction of metal values and novel metal extractants |
| 03/18/1986 | US4576812 Chlorination of copper, lead, zinc, iron, silver and gold |
| 02/25/1986 | US4572822 Leaching with sulfuric acid in sulfur dioxide atmosphere |