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| 5234669 | Recovery of non-ferrous metals from smelter flue dusts and sludge... |
| 5230744 | Method for cleaning bag machinery |
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| 5225000 | Method for cleaning closed spaces with ultraviolet rays |
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| 5221525 | Solvent extraction of gallium from acidic solutions containing ph... |
| 5221528 | Process for the preparation of sodium chloride |
| 5219541 | Sodium hydroxide production with a calcium carbonate seed crystal |
| 5211933 | Method for preparation of LiCoO2 intercalation compoun... |
| 5209910 | Process for the recovery and separation of tantalum and niobium |
| 5209911 | Method of making metal stannates |
| 5209785 | Non-chlorinated solvent dewax process |
| 5207995 | Recovery of cerium from fluoride-containing ores |
| 5207996 | Acid leaching of copper ore heap with fluoroaliphatic surfactant |
| 5207997 | Process for producing an inorganic barium-containing solids compo... |
| 5204074 | Recovery of gallium values from basic aqueous solutions thereof |
| 5196178 | Method of producing dustfree silver nitrate |
| 5194232 | Process for the preparation of tantalum/niobium hydroxides and ox... |
| 5188736 | Process for the separation and recovery of extractant from spent ... |
| 5186920 | Recovering TiO2 concentrates from TiO2 -con... |
| 5178848 | Lithium metatungstate |
| 5174971 | Continuous anion exchange chromatography for the separation of zi... |
| 5174812 | Separation and recovery of nickel and cobalt in ammoniacal system... |
| 5173277 | Methods for processing battery waste and other lead-contaminated ... |
| 5171549 | Process for decreasing the level of impurities in zirconium chlor... |
| 5171547 | Recovery of chromium in high purity state from waste materials of... |
| 5169619 | Method of producing titanium oxides |
| 5169610 | Method for the purification of rare earth oxysulfide |
| 5167939 | Process for removing calcium and magnesium ions from an aqueous a... |
| 5165901 | Platinum group metal recovery with a polyamine |
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