SYSTEM AND PROCESS FOR SELECTIVE RARE EARTH EXTRACTION WITH SULFUR RECOVERY

文件类型：PDF文档
文件大小：1066K
The application relates to a process for rare earth extraction and thorium removal from monazite or bastnasite bearing ores or ore beneficiation and industrial waste containing a variable amount of rare earth elements as oxides, phosphates, carbonates or sulfates, comprising (i) controlled mixture between sulfuric acid and the material containing rare earth and (ii) water leaching under controlled conditions.