| Patents for C22B 34 - Obtaining refractory metals (6,435) |
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| 04/22/1980 | US4199551 Recovery of molybdenum and uranium from activated charcoal containing molybdenum and residual uranium |
| 04/08/1980 | US4197276 Recovery of titanium metal values |
| 03/11/1980 | US4192674 Method of obtaining tantalum-niobium from ores having a high titanium content |
| 03/11/1980 | CA1073566A1 Process for treating an acid waste liquid |
| 02/19/1980 | CA1071843A1 Process for recovering titanium values from slag containing such values |
| 02/12/1980 | CA1071413A1 Process for recovering vanadium from deactivated catalysts |
| 02/05/1980 | US4187117 Coked grains, binders |
| 01/29/1980 | CA1070503A1 Chromite recovery from chromite-bearing ore |
| 01/22/1980 | US4185078 Molybdenum, quaternary ammonium compound, highly aromatic solvent |
| 01/15/1980 | US4183899 Chlorination of ilmenite and the like |
| 01/15/1980 | CA1069691A1 Vacuum revolving cylindrical furnace |
| 01/09/1980 | EP0006101A1 Process for chrome recovery from industrial waste and the like |
| 12/18/1979 | US4179489 Chlorination of iron-containing materials |
| 12/18/1979 | US4179370 Flocculating agent comprising water-in-oil emulsion of stabilizer plus NH-active polymer carrying formaldehyde and amine radicals |
| 12/11/1979 | US4178308 Process for the preparation of 1-amino-8-naphthol-3,6-disulphonic acid (H-acid) |
| 12/11/1979 | US4178176 From ilmenite by reductive roasting, leaching and oxidation |
| 11/27/1979 | US4176159 Process for concentration of titanium containing anatase ore |
| 11/27/1979 | US4175952 Recovery of iron and titanium metal values |
| 11/20/1979 | US4175110 Recovery of titanium metal values |
| 11/20/1979 | US4175109 Process for extracting tungsten from alkali metal tungstate solutions |
| 11/20/1979 | US4174963 Recovery of titanium metal values |
| 11/15/1979 | WO1979000906A1 Recovery of elemental sulfur and metal values from tailings from copper recovery processes |
| 11/14/1979 | EP0005323A1 Processing of metal chlorides |
| 11/13/1979 | CA1066023A1 Process for production of titanium tetrachloride |
| 11/06/1979 | US4173467 Process for recovering valuable metals from superalloy scrap |
| 10/31/1979 | EP0005018A1 Production of titanium chlorides |
| 10/30/1979 | US4172878 Recovery of titanium metal values |
| 10/30/1979 | CA1065415A1 Titanium and zirconium production by arc heater |
| 10/23/1979 | CA1064711A1 Extraction method for non-ferrous metals |
| 10/23/1979 | CA1064678A1 Process for purifying technical grade molybdenum oxide |
| 10/16/1979 | US4171281 Coke and sawdust |
| 10/16/1979 | US4171248 Chromite; oxidation of trivalent chromium to hexavalent alkali chromate with alkali metal hypochlorite bleach |
| 10/09/1979 | CA1063776A1 Method for working-up shale |
| 09/18/1979 | US4168297 Recovery of TiO2 from ilmenite-type ore using an organophosphoric acid extractant for impurity iron removal |
| 09/18/1979 | US4168296 Extracting tungsten from ores and concentrates |
| 09/18/1979 | CA1062514A1 Reduction smelting of manganese nodules with a liquid reductant |
| 09/11/1979 | US4167555 Extraction of tungsten from ores |
| 09/04/1979 | CA1061568A1 Process for extracting metal values from manganiferous ocean floor nodule ore |
| 08/28/1979 | US4166098 Solvent extraction |
| 08/22/1979 | EP0003709A1 Hot leaching of ores with a liquid mainly containing a soluble bicarbonate |
| 08/14/1979 | US4164417 Aluminothermic reduction, alloying |
| 08/14/1979 | CA1060283A1 Method of making an ordered alloy |
| 08/07/1979 | CA1059770A1 Hydrometallurgical treatment process for extracting constituent metal values from ferro-nickel |
| 08/07/1979 | CA1059769A1 Extraction of metal values from leached slurries |
| 07/03/1979 | CA1057509A1 Metal powder production by direct reduction in an arc heater |
| 07/03/1979 | CA1057508A1 Metal powder production by direct reduction in an arc heater |
| 06/26/1979 | CA1057063A1 Recovery of base metals from manganese-containing ores |
| 06/19/1979 | CA1056855A1 5-heptyl-2-hydroxy benzaldoximes |
| 06/12/1979 | US4158041 Separation of ilmenite and rutile |
| 06/12/1979 | US4157942 Method for recovery of metals from metal plating baths and neutralizing toxic effluents therefrom |
| 05/15/1979 | CA1054377A1 Process for the treatment of calcium tungstate |
| 05/15/1979 | CA1054338A1 Production of metal carbides and metals |
| 05/08/1979 | CA1053911A1 Molybdenum oxide purification process |
| 05/08/1979 | CA1053910A2 Productions of metals |
| 05/01/1979 | US4152252 Purification of rutile |
| 04/24/1979 | US4150975 Process for producing metallic chromium |
| 04/18/1979 | EP0001537A1 Process for the treatment of solutions containing carbonate, sulfate, possibly hydroxide of sodium or potassium and at least one of the metals vanadium, uranium, molybdenum |
| 04/17/1979 | US4150093 Method for concentrating heavy minerals in the solids tailings from hot water extraction of tar sands |
| 04/17/1979 | US4150092 Process for recovering vanadium values from acidic chloride solutions |
| 04/17/1979 | US4149880 Smelter flue dusts and refinery wastes; leaching with sulfuric acid, solubilizing, precipitating toxins, cementation on iron |
| 04/17/1979 | US4149876 Process for producing tantalum and columbium powder |
| 04/17/1979 | CA1052581A1 Process for the treatment of calcium titanate |
| 04/17/1979 | CA1052580A1 Process for the treatment of iron and manganese tungstates |
| 04/10/1979 | US4148628 Carbon reduction of chromium oxide |
| 03/20/1979 | US4145397 Process for recovering molybdenum, vanadium, cobalt and nickel from roasted products of used catalysts from hydrotreatment desulfurization of petroleum |
| 03/20/1979 | CA1050731A1 Hydrometallurgical production of technical grade molybdic oxide from molybdenite concentrates |
| 02/27/1979 | CA1049268A1 Leech alloying |
| 02/20/1979 | US4140746 Recovery of chlorine values from iron chloride by-produced in chlorination of ilmenite and the like |
| 02/13/1979 | US4139460 Reduction with metal sulfide |
| 02/13/1979 | CA1048278A1 Metal carbonate recycle to reduction circuit in the cuprion process |
| 02/07/1979 | EP0000498A1 A flow process for chlorinating ferruginous titaniferous material |
| 02/07/1979 | EP0000493A1 Process for the preparation of 1-amino-8-hydroxy-naphthalene-3,6-disulphonic acid (H acid). |
| 02/06/1979 | US4138467 Burning off bitumen and coke from particles and recovery thereof |
| 02/06/1979 | US4138466 Reacting titanium oxide with the calcium |
| 02/06/1979 | US4138248 Recovery of elemental sulfur and metal values from tailings from copper recovery processes |
| 01/30/1979 | CA1047258A1 Process for recovering copper from basic salt mixtures |
| 12/26/1978 | US4131539 Titanium dioxide |
| 12/26/1978 | CA1044899A1 Process for producing metallic zirconium |
| 12/19/1978 | CA1044486A1 Molybdenum and ferromolybdenum production |
| 12/19/1978 | CA1044468A1 Extracting of iron ore and chromium from nickel lateritic ores |
| 12/12/1978 | US4129438 Method of adding trace elements to base metals |
| 12/05/1978 | CA1043573A1 Method for reducing metal chloride |
| 12/05/1978 | CA1043572A1 Process for separation of tungsten and molybdenum by extraction |
| 12/05/1978 | CA1043538A1 Process for producing titanium tetrachloride |
| 11/28/1978 | US4127409 Method of reducing zirconium |
| 11/21/1978 | US4126493 Process for deoxidation of refractory metals |
| 11/07/1978 | US4124682 Method of producing high purity aluminum chloride |
| 10/31/1978 | CA1041304A1 Process for recovering valuable metals from sulfate solutions |
| 10/24/1978 | CA1040868A1 Process for recovery of valuable metals from solution using neutralization by lime or limestone |
| 10/17/1978 | US4120934 Crushing, leaching, roasting |
| 10/17/1978 | US4120694 Process for purifying a titanium-bearing material and upgrading ilmenite to synthetic rutile with sulfur trioxide |
| 10/17/1978 | CA1040434A1 Post-treatment of ilmenite ore subjected to selective chlorination treatment |
| 10/10/1978 | US4119698 Digestion with sulfuric acid or sulfur trioxide, bayer process |
| 10/10/1978 | US4119697 Titanium dioxide, reductive roasting, leaching, metal oxides |
| 10/10/1978 | US4119696 Production of titanium metal values |
| 10/03/1978 | CA1039511A1 Process for thermal dissociation of molybdenum disulfide |
| 09/26/1978 | US4116783 Method for recovering variable-valency elements and purifying sewage waters |
| 09/19/1978 | US4115526 Process for the preparation of reactive tungsten and derivatives thereof |
| 09/19/1978 | US4115110 Vanadium recovery process |
| 09/19/1978 | CA1038937A1 Plasma heat treatment of particulate material |