Patents
Sitemap › C01 - Inorganic chemistry › C01F - Compounds of the metals beryllium, magnesium, aluminium, calcium, strontium, barium, radium, thorium, or of the rare-earth metals › C01F 17 - Compounds of the rare-earth metals, i.e. scandium, yttrium, lanthanum, or the group of the lanthanides
Patents for C01F 17 - Compounds of the rare-earth metals, i.e. scandium, yttrium, lanthanum, or the group of the lanthanides (4,902)
12/1992
12/09/1992EP0341274B1 Process for the preparation of metal oxide powders
12/08/1992US5169610 Heat treatment in oxygen, then an inert gas
12/03/1992DE4117207A1 Rare earth metal nitrate prodn. esp. cerium nitrate from chloride soln. - by nitric acid stripping from loaded phosphate ester extractant
12/01/1992US5167938 Process for strontium-82 separation
11/1992
11/18/1992CN1019097B Crystal powder of hexagonal bipyramid scandium oxide and prepn. method thereof
11/03/1992CA1309596C Rare earths liquid-liquid extraction separation process
11/03/1992CA1309595C Rare earths liquid-liquid extraction separation process
10/1992
10/28/1992CN1018819B Prodn. of rare-earth oxide and products therefrom
10/28/1992CN1018818B Precipitation of rare-earth with a mixed precipitant
10/20/1992US5157547 Transparent coating having a medium refractivity
10/13/1992US5155085 Heat resistant transition alumina and process for producing the same
10/08/1992DE4110835A1 Verfahren zur herstellung hydrophobierter doppelschichthydroxid-verbindungen A process for preparing hydrophobicized double layer hydroxide compounds
10/06/1992US5152936 Voidless, increased density
10/05/1992WO1992017405A1 Process for producing hydrophobised double-layer hydroxide compounds
10/05/1992CA2107685A1 Process for producing hydrophobicized double-layer hydroxide compounds
10/01/1992DE4210153A1 Stable cerium di:oxide solns. - contain phosphoric acid and/or phosphate, and pref. also quat. ammonium salt as cationic surfactant
09/1992
09/23/1992EP0505277A1 Method for separating iron and/or zirconium from actinides and/or lanthanides present in an aqueous acid solution using a propane diamide
09/23/1992EP0505190A1 Method of forming rare earth oxide ceramic scintillator with ammonium dispersion of oxalate precipitates
09/16/1992CN1064472A Method of forming yttria-gadolinia ceramic scintillator using hydroxide coprecipitation step
09/08/1992US5145605 Nonsettling, storage stability
09/02/1992EP0501664A1 Method of forming yttria-gadolinia ceramic scintillator using hydroxide coprecipitation step
09/02/1992EP0501335A1 A method of recovery of basic reactants for ZBLAN glass synthesis from purified solutions
09/02/1992CN1064110A Process for treatment of ores containing rare earths
09/02/1992CN1064109A Process for treatment of ores containing rare earths
08/1992
08/26/1992WO1992014546A1 Synthetic spinels and processes for making them
08/26/1992EP0500255A1 Method of forming yttria gadolinia ceramic scintillator from ammonium dispersed oxalate precipitates
08/26/1992CN1017985B Rare earth fluoride preparing method
08/26/1992CN1017984B Process for preparing pure cerous hydroxide
08/26/1992CN1017983B Clustering method for fractional distillation extraction of gadolinium, terbium, dysprosium and yttrium
08/19/1992CN1063718A High-purity rare-earth preparing method by separating beavy metal impurity
08/19/1992CN1017887B Obtaining lanthanides by extraction and separation of solvent
08/12/1992CN1063509A Technological process of reductive extraction for high purity europium
07/1992
07/21/1992US5132048 Weakly acidic colloidal dispersions of cerium (iv) compounds
07/15/1992CN1062748A Red phosphor and method of manufacture thereof
07/15/1992CN1017419B Process for preparing europium sulfate
07/15/1992CN1017418B Separation of heavy metals from rare earth solution
07/14/1992US5129945 Scrap treatment method for rare earth transition metal alloys
07/09/1992WO1992011223A1 Isosynthesis method in the presence of a catalyst based on an oxide of at least two different metals
07/01/1992CN1017261B Stocking impregnation technology for ion-adsorption type of rare-earth minerals
06/1992
06/25/1992DE4142389A1 Red yttrium oxysulphide phosphor activated with europium - and co-activated with terbium and samarium to increase brightness, used in colour picture tube
06/24/1992EP0491459A2 Pollucite powders with low thermal expansion coefficients and methods for their preparation
06/23/1992CA1303941C Colloidal dispersion of a cerium iv compound in aqueous media and its preparation process
06/23/1992CA1303940C Process for obtaining colloidal dispersion of rare earth compound in a aqueous environment and product obtained with such process
06/10/1992EP0449942A4 Phosphonic acids and their uses in separation
05/1992
05/27/1992CN1061403A Process for preparing rare earth ammonium double oxalate and use in preparing rare earth oxidate and obtained rare earth oxidate
05/27/1992CN1061402A Process for preparing rare earth ammonium double oxalate and use for preparing rare earth oxidate
05/26/1992US5116560 Method of forming rare earth oxide ceramic scintillator with ammonium dispersion of oxalate precipitates
05/26/1992US5116559 Method of forming yttria-gadolinia ceramic scintillator using hydroxide coprecipitation step
05/20/1992EP0486351A1 Method for the production of mixed ammonium-rare earth oxalates and their application to the production of rare earth oxides
05/20/1992EP0486350A1 Method for the production of mixed ammonium-rare earth oxalates and their application to the production of rare earth oxides and rare earth oxides so produced
05/20/1992CN1016709B Process for treatment of rare earth metals ores
05/20/1992CN1016679B Extraction of rare-earth elements by circulating oxalic acid
05/19/1992CA1300896C Metallothermic reduction of rare earth chlorides
05/14/1992CA2055294A1 Process for the preparation of rare-earth and ammonium twin oxalates, and their use in preparing rare-earth oxides
05/13/1992EP0485256A1 Process for the separation of the rare earths
05/12/1992US5112676 Gelation, polymerization, heat treatment of metallic alkoxide emulsions
05/12/1992US5112524 Unactivated yttrium tantalate phosphor
05/06/1992CN1060876A Preparation method of samarium oxide
05/06/1992CN1060828A Preparation of cerium oxide
04/1992
04/28/1992US5108979 Synthetic spinels and processes for making them
04/21/1992CA1298955C Continuous process for production of fine particulate ceramics
04/14/1992US5104544 Refining of a rare earth including a process for separation by a reverse osmosis membrane
03/1992
03/31/1992US5100598 Method of forming yttria-gadolinia ceramic scintillator from ammonium dispersed oxalate precipitates
03/24/1992US5099006 Alkoxy-type derivative compounds and process for preparing alkoxy-type derivatives of trivalent group 3b metals
03/18/1992CN1015911B Recovering gold and silver from difficultly processing gold ore
03/11/1992CN1015801B Preparation method of high purity yttrium oxide and lanthanum oxide
02/1992
02/26/1992CN1058994A One-step extracting and seperating pure yttrium, crude erbium and heavy rare-earth
02/19/1992EP0471091A1 Process for producing rare earth oxysulfide phosphor
02/12/1992EP0470376A1 Rare earth/iron fluoride and methods for making and using same
02/12/1992CN1015436B Method for separating si, ca, la from yb by extraction
01/1992
01/18/1992CA2045974A1 Rare earth/iron fluoride and methods for making and using same
01/14/1992US5080877 Novel cerium oxide particulates
01/08/1992EP0464965A2 Synthesis of superconductors from xenotyme
01/08/1992EP0464627A1 Heat resistant transition alumina and process for producing the same
12/1991
12/30/1991CA2046007A1 Heat resistant transition alumina and process for producing the same
12/27/1991EP0462388A2 Coated particles, hollow particles, and process for manufacturing the same
12/18/1991EP0461949A1 Composition containing alumina doped with rare earths and/or alkaline earths and process for its preparation
12/17/1991US5073337 Rare earth/iron fluoride and methods for making and using same
12/11/1991CN1056906A Manufacturing two-valence europium by electrolysis reduction
12/04/1991CN1015039B Mixed lanthanum-magnesium aluminates, their production process and lasers using these aluminates
12/04/1991CN1014976B High-purity terbium oxide preparation by use of fractional extraction method
11/1991
11/13/1991CN1056098A Process for preparing double oxalate of rare earth ammonium and use in preparation of rare earth oxide, obtaining double oxalate and oxide
11/12/1991US5064628 Novel ceric oxides and preparation thereof
11/06/1991EP0455529A1 Process for preparing dioxalates of rare earths and ammonium and their use for the preparation of rare earth oxides, dioxalates and the obtained oxides
10/1991
10/30/1991CN1055767A Preparation of fluorescence grade eu2o3 by reduction--chro-matographic extraction method
10/30/1991CN1014510B Separation of rare-earth element dysprosium by liquid-liquid extraction separation
10/29/1991US5061560 Voidless powder containing an organic binder; green strength; moldings
10/29/1991CA1291316C Recovery of cesium chloride from contaminated solutions
10/22/1991US5059575 Ceramic of a heat-resistant oxide, cerium/iv/ oxide and an alkali metal oxide; diesel engine exhaust systems
10/16/1991CN1055395A Precipitation of rare earth by replacing oxalic acid with carbonic acid
10/16/1991CN1055394A Preparation of high-purity cerium compound by use of solvent extraction method
10/16/1991CN1055393A Process for separation of yttrum
10/09/1991EP0451003A1 Process for the separation of yttrium
10/09/1991EP0449942A1 Phosphonic acids and their uses in separation.
09/1991
09/25/1991CN1014028B New extracting device of solvent with compact structure
09/17/1991US5049363 Recovery of scandium, yttrium and lanthanides from titanium ore
09/10/1991CA1288599C Process for the stripping of cesium ions from aqueous solutions
09/05/1991WO1991013124A1 Process for producing rare earth oxysulfide phosphor
09/04/1991EP0444470A1 High surface area ceria
09/04/1991CN1054269A Chromium-carbonate process for separation of mixed rare-earth in groups
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