| Patents for C22B 34 - Obtaining refractory metals (6,435) |
|---|
| 08/24/1976 | US3976571 Extraction |
| 08/24/1976 | US3976475 Or niobium from acid solutions thereofamine, extraction, hydrogen peroxide |
| 08/24/1976 | US3976472 Method and an electrically heated device for producing molten metal from powders or lumps of metal oxides |
| 08/17/1976 | US3975495 Metals recovery from hydrochloric acid solutions |
| 08/03/1976 | US3972710 Hydrofluoric acid, ketone extraction, silicofluoric acid |
| 07/13/1976 | US3969484 Process for recovering tungsten from alkaline leaching solution of tungsten ores |
| 07/13/1976 | US3969478 Process for separation of tungsten and molybdenum by extraction |
| 07/13/1976 | US3969246 From waste water |
| 07/06/1976 | US3967954 Pre-leaching or reduction treatment in the beneficiation of titaniferous iron ores |
| 06/29/1976 | US3966460 Reduction of metal halides |
| 06/29/1976 | US3966459 Process for thermal dissociation of molybdenum disulfide |
| 06/29/1976 | US3966458 Tetrachlorides by distillation of a eutectic mixture of sodium and potassium chlorides |
| 06/29/1976 | US3966455 Phosphoric acid, zinc oxide, sulfated surfactant, alkali or alkaline metal carbonate |
| 06/15/1976 | US3963824 Process for extracting chromium from chromium ores |
| 06/15/1976 | US3963823 Sulfuric-nitric acid, ammonium hydroxide |
| 06/08/1976 | US3961940 Artificial rutile, magnetic separation, flotation, xanthates, dithiophosphates |
| 06/01/1976 | US3960544 Process for the production of iron-containing titaniferous particles |
| 05/25/1976 | US3959465 Process for preparing concentrated titanium mineral |
| 05/25/1976 | US3958985 Inorganic acids, heat treatment |
| 05/18/1976 | US3957946 Molybdenum oxide purification process |
| 05/18/1976 | US3957485 Reduction smelting of manganese nodules with a liquid reductant |
| 04/13/1976 | US3950489 Chlorine treatment of titaniferous ores |
| 04/13/1976 | US3950488 Ion exchanging |
| 04/13/1976 | US3950487 Solvent-in-pulp extraction of copper and nickel from ammoniacal leach slurries |
| 04/06/1976 | US3948637 Process for class IV-B metals ore reduction |
| 03/30/1976 | US3947542 Extraction of niobium, rare earth elements and thorium |
| 03/16/1976 | US3944647 Recovering chlorine from the chlorination of titaniferous material |
| 03/02/1976 | US3941867 Production of molybdenum trioxide from molybdenite in a fluidized bed |
| 03/02/1976 | US3941668 Refractory ore beneficiation |
| 03/02/1976 | US3941583 Coke matrix skin |
| 02/17/1976 | US3939245 Sulfuric acid, hydrogen sulfide, recycle |
| 02/17/1976 | US3939244 Process for the purification of titanium tetrachloride |
| 01/20/1976 | US3933474 Leech alloying |
| 01/13/1976 | US3932580 H2so4, roasting, leaching, nh(3), crystallization of nh42moo4 |
| 01/06/1976 | US3931044 Method for recovering molybdenum catalyst values and use of said values in the recycling of said catalyst |