| Patents for C01F 17 - Compounds of the rare-earth metals, i.e. scandium, yttrium, lanthanum, or the group of the lanthanides (4,902) |
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| 06/23/1990 | CA2006562A1 Process for preparing a ceric oxide with a large specific surface |
| 06/16/1990 | CA2005627A1 Rare-earth oxide with new morphologic characteristics and process for preparing the same |
| 06/06/1990 | EP0371629A1 Optical fibre manufacture |
| 06/05/1990 | US4931172 Fluoride ion-selective electrodes based upon superionic conducting ternary compounds and methods of making |
| 05/30/1990 | EP0370824A1 Method of producing optically transparent yttrium oxide |
| 05/30/1990 | CN1042570A High-purity terbium oxide preparation by use of fractional extraction method |
| 05/30/1990 | CN1042526A Prepn. of high purity yttrium oxide and lanthanum oxide |
| 05/30/1990 | CN1042525A Process for extracting mixed rare-earth oxide |
| 05/23/1990 | CN1008083B Rare-earth separating method with multiple outlets by one step extraction |
| 05/23/1990 | CN1008082B Precipitating rare-earth by using ammonium bicarbonate |
| 05/22/1990 | US4927609 Recovery of gallium/rare earth values from oxide mixtures thereof |
| 05/22/1990 | US4927560 Gelation, drying |
| 05/17/1990 | WO1990005115A1 Phosphonic acids and their uses in separation |
| 05/16/1990 | CN1007965B Composite porous matercal, process for production and separation of metallic |
| 05/08/1990 | US4923630 Extractant composition |
| 04/25/1990 | EP0365413A1 Rare earth halide dispersions in oil |
| 04/25/1990 | EP0364494A1 Improved process for making 90 k superconductors |
| 04/18/1990 | EP0364328A2 Rare-earth halide dispersions in an aqueous environment |
| 04/10/1990 | US4915869 Mixed lanthanum-magnesium aluminates |
| 03/21/1990 | CN1040572A Manufacturing method for ceramics and products thereof |
| 03/21/1990 | CN1040564A Method for separation of heavy metals from europium-containing solution |
| 03/13/1990 | US4908108 Electrolytic oxidation of cerium 3+ values to cerium 4+ values |
| 02/20/1990 | US4902655 Fluidized bed chlorination of rare earth ore, separation of yttrium chloride as by-product |
| 02/20/1990 | US4902426 Chromatographic separation of rare earth ions or actinide ions |
| 02/13/1990 | US4900536 Preparation of precursors for yttrium-containing ceramic superconductors |
| 02/07/1990 | EP0353926A2 Methods of producing yttrium-aluminium-garnet fine particles and yttrium-aluminium-garnet based phosphor fine particles |
| 02/06/1990 | US4898719 Liquid extraction procedure for the recovery of scandium |
| 01/17/1990 | EP0351334A1 Process for manufacturing nuclear fuel pellets comprising the production and the use of flowable and frittable powders directly obtained by precipitating peroxides |
| 01/03/1990 | EP0349401A1 Rare-earth trifluoride with new morphological characteristics, and its preparation process |
| 01/02/1990 | US4891163 Method of processing nuclear fuel scraps |
| 12/20/1989 | CN1038072A Crystal powder of hexagonal bipyramid scandium oxide and preparation method thereof |
| 12/13/1989 | EP0345905A2 Photostimulable phosphor and use in radiography |
| 12/13/1989 | EP0345904A2 Photostimulable phosphor and radiographic application |
| 12/13/1989 | EP0345903A2 Photostimulable phosphor |
| 12/13/1989 | CN1037999A Mixed lanthanum-magnesium aluminates, their production process and lasers using these aluminates |
| 12/13/1989 | CN1037875A Stocking impregnation technology for ion-adsorption type of rare-earth minerals |
| 12/12/1989 | US4886624 Colloidal alcohol-dispersible association complexes of ceric dioxide and a hydroxyphenyl carboxylic acid |
| 12/06/1989 | EP0345052A2 Fluoride ion-selective electrodes based upon superionic conducting ternary compounds and methods of making |
| 12/05/1989 | US4885247 Recovery and purification of lactate salts from whole fermentation broth by electrodialysis |
| 11/15/1989 | EP0341274A1 Process for the preparation of metal oxide powders. |
| 11/15/1989 | CN1037127A Extraction technical scheme for rock rot earth absorbent type rare and scattered valuable metals |
| 11/08/1989 | EP0341119A1 Process for treating scrap containing rare earths and cobalt |
| 11/08/1989 | CN1036937A Process for fractionating mixture of rare earth metals by ion exchange |
| 10/25/1989 | EP0338162A1 Recovery and purification of lactate salts from whole fermentation broth by electrodialysis |
| 10/04/1989 | EP0335538A2 Process for fractionating a mixture of rare earth metals by ion exchange |
| 10/04/1989 | CN1035996A Fractional extraction of rare-earth elements |
| 10/03/1989 | US4871464 Using acidic phosphoric acid ester |
| 09/27/1989 | EP0334077A1 Method for recovering refractory compositions from investment casting shell molds |
| 09/27/1989 | EP0333757A1 Process for the chromatographic separation of metal ions. |
| 09/26/1989 | CA1261589A1 Predetermined and enhanced densification in sintered metal oxides |
| 09/20/1989 | EP0332686A1 Process for preparing metallic oxides |
| 09/20/1989 | CN2044512U Large-sized horizontal case-type extractor with mixing and clearing functions |
| 09/20/1989 | CN1035622A New extracting device of solvent with compact structure |
| 09/19/1989 | US4867951 Separation of actinides from lanthanides |
| 09/13/1989 | EP0332512A1 Process for electrochemically oxidising cerium 3+ to cerium 4+, in an emulsion |
| 09/06/1989 | CN1035322A Method for preparing metallic yttrium |
| 08/29/1989 | US4861753 Process for making superconductors using barium nitrate |
| 08/23/1989 | CN1034964A Rare-earth hexaboronide synthesized by melted salt electrolysis technique |
| 08/22/1989 | US4859432 Novel ceric oxide particulates and process of making |
| 08/16/1989 | EP0327851A2 Method for recovering casting refractory compositions from investment casting slurries and from cores |
| 08/09/1989 | EP0205454B1 Process for the preparation of ultrapure active metal fluorides |
| 08/09/1989 | CN1034524A Extraction method of scandium oxide from artificial rutile |
| 07/25/1989 | CA1257766A1 Process for producing fluorides of metals |
| 07/19/1989 | EP0324671A2 Alkoxy-type derivatives of trivalent metals of group 3b, and their preparation |
| 07/19/1989 | EP0324665A1 Anhydrous cerous nitrate-ammonium nitrate complex and process for its production from ceric ammonium nitrate |
| 07/19/1989 | EP0324276A2 Synthesis of superconductors from xenotyme |
| 07/19/1989 | CN1033976A Precipitation of rare earths with a mixed precipitant |
| 07/13/1989 | WO1989006219A1 Yttrium-barium-cobalt oxide conductive compositions |
| 07/12/1989 | CN1033783A Photoreduction method of separating and extracting fluorescence-level europium sesquioxide from beneficiated rare-earth |
| 07/11/1989 | CA1257071A1 Process for preparing ceric oxide; ceric oxide possessing morphologic characteristics |
| 07/11/1989 | CA1257070A1 Process for preparing ceric oxide; ceric oxide possessing morphologic characteristics |
| 07/04/1989 | US4845056 Continuous process for production of fine particulate ceramics |
| 06/28/1989 | CN1004640B Preparation of mgo.lao.al2o3.ndo single crystal |
| 06/14/1989 | EP0320161A1 Preparation of a metal bromide or oxide bromide |
| 06/14/1989 | EP0319770A1 Process for recovering samarium and europium from the depleted bath mixture in the molten-salt-electrolysis preparation of mischmetal |
| 06/07/1989 | EP0319365A1 Process for the preparation of titanium oxide, zirconium oxide or cerium oxide, and products therefrom |
| 06/07/1989 | CN1004427B Metallothermic reduction of rare earth oxides |
| 05/31/1989 | EP0318362A1 Process for the preparation of rare earth borides |
| 05/17/1989 | EP0316205A1 Colloidal dispersion of a cerium IV compound in an aqueous medium, and process for its preparation |
| 05/03/1989 | EP0313647A1 Ion exchange method for separation of scandium and thorium |
| 04/20/1989 | WO1989003365A1 Continuous process for production of fine particulate ceramics |
| 04/18/1989 | CA1252751A1 Process for the separation of cerium and rare earths |
| 04/12/1989 | CN1032327A Fractional-distillation extraction of yttrium oxide |
| 04/06/1989 | WO1989002871A1 Process for the preparation of metal oxide powders |
| 04/06/1989 | WO1989002869A1 Process for preparing metallic oxides |
| 03/28/1989 | US4816233 Ion exchange method for the recovery of scandium |
| 03/28/1989 | US4815516 Method for recovering casting refractory compositions from investment casting shell molds |
| 03/22/1989 | EP0308311A1 Process for the preparation of a colloidal dispersion of a rare earth compound in an aqueous medium, and product obtained |
| 03/15/1989 | EP0306980A1 An ion exchange method for the recovery of scandium |
| 03/14/1989 | CA1251192A1 Method for the preparation of an amorphous metal oxide composite |
| 03/08/1989 | CN1031620A New superconductive compound of potassium-nickel fluoride type structure with high transforming and its preparation |
| 03/07/1989 | CA1250742A1 Material of oxygen ion conductor |
| 02/28/1989 | US4808384 Acid digestion, reduction, separation, extraction, stripping; precipitating impurities |
| 02/22/1989 | EP0304369A2 Process for the preparation of colloidal dispersions of ceric dioxide in an alcoholic medium |
| 02/22/1989 | CN1031213A Prodn. of rave-earth oxide and products therefrom |
| 02/14/1989 | CA1249924A1 Air electrode material for high temperature electrochemical cells |
| 01/25/1989 | EP0300853A1 Process for obtaining a cerium oxide |
| 01/25/1989 | EP0300852A1 Cerium oxide with morphological characteristics and process for its preparation |
| 01/25/1989 | EP0300851A1 Process for obtaining a cerium oxide |
| 01/24/1989 | US4800072 Alkoxides of cerium |