Matches 201 - 250 out of 285 < 1 2 3 4 5 6 >
Match Document Document Title
3515509 PROCESS FOR EXTRACTING AND CONCENTRATING EUROPIUM  
3506585 METHOD FOR RECLAIMING RARE EARTH FLUORESCENT SUBSTANCES  
3492084 PROCESS FOR SEPARATING RARE EARTHS  
3486843 PROCESS FOR SEPARATING EUROPIUM FROM OTHER RARE EARTHS  
3482932 PROCESS FOR SEPARATING YTTRIUM FROM THE LANTHANIDE ELEMENTS  
3474040 PHOSPHOR RECLAMATION  
3473897 METHOD FOR SEPARATING URANIUM AND PROTACTINIUM FROM SPENT MOLTEN FLUORIDE SALT MIXTURES CONTAINING RARE EARTH FISSION PRODUCTS  
3468622 PROCESS FOR RECOVERING RARE EARTH METAL VALUES  
3463619 SOLVENT EXTRACTION PROCESS FOR PURIFYING AMERICIUM AND CURIUM  
3458277 PROCESS FOR THE RECOVERY OF MOLYBDENUM VALUES AS HIGH PURITY AMMONIUM PARAMOLYBDATE FROM IMPURE MOLYBDENUM-BEARING SOLUTION,WITH OPTIONAL RECOVERY OF RHENIUM VALUES IF PRESENT  
3453069 SEPARATION OF RARE EARTH ELEMENTS  
3446576 PROCESS FOR PURIFICATION OF YTTERBIUM  
3429904 SEPARATION OF CHELATES OF RARE EARTH COMPOUNDS AND PROMETHIUM BY FRACTIONAL SUBLIMATION  
3425793 PROCESS FOR FRACTIONATING LANTHANIDE MIXTURES CONTAINING CERIUM  
3420860 METHOD OF RARE-EARTH METAL RECOVERY FROM ORTHOVANADATE COMPOUND  
3413082 Process for recovering zr-values from ores  
3387944 Batch separation of components of a mixture by total solute reflux  
3383182 Separation process of thorium from rare earth metals  
3382048 Method of pretreating metallic hydrides  
3375061 Pyrohydrolytic attack of rare earth fluocarbonate ores  
3369875 Process for treating phosphate ores to obtain metal sulfides and phosphorus sulfides  
3353928 Process for treating rare earth-fluorine materials  
3351424 Separation of cerium from other rare earths  
3341437 Method of producing rare earth oxyfluoride  
3337306 Extraction of fused salts of europium and neodymium using a molten borate ion-exchanger  
3302993 Process of recovering strontium, cesium, cerium and rare earth values from radioactive solutions  
3294494 Method for removing lanthanides and trivalent actinides from aqueous nitrate solutions  
3293004 Process for solvent extraction stripping  
3292062 Method for preparing stabilized barium titanate, and capacitor  
3282641 Scavenger and process for purification of metal fluorides  
3276849 Method for separating members of actinide and lanthanide groups  
3275404 Process for separating rare earth metal values  
3252754 Process for extraction of thoria and ceria from rare earth ores  
3243254 Method for extracting lanthanides and actinides  
3234494 Ferromagnetic compound and devices including elements thereof  
3230036 Method for separating americium and curium from the lanthanide rare earths and yttrium  
3228750 Process for separating rare-earth elements by ion exchange  
3199947 Method of purifying refractory sulfides  
3179492 Purification of certain refractory oxides  
3159452 Process for recovering thorium and rare earth values  
3153571 Purification of europium  
3128247 Ion exchange  
3112990 Process for separating cerium from trivalent rare earths  
3111375 Process for the separation of thorium, cerium and rare earths starting from their oxides or hydroxides  
3102783 Process for separating samarium, europium and ytterbium from other rare earths  
3092449 Process for the recovery of europium from low grade europium mixtures with other rare earths  
3078142 Process for separating yttrium and rare earths  
3049403 Process for precipitating readily filterable rare earth hydroxides  
3025131 Process for the removal of carbonates from carbonate-containing ores  
3009774 Process of making sodium-rare earth fluorides  
Matches 201 - 250 out of 285 < 1 2 3 4 5 6 >