Research Papers by H. Singh

Separation of high purity rare earth elements from their mixed oxides, obtained from monazite or xenotime, requires multiple stages of separation by circuits incorporating one or more solvents. The separation factors being small, a large number of counter-current stages become necessary. Process dev

A solvent extraction process for the production of nuclear grade Dy2O3 for its applications in advance heavy water reactor (AHWR) from a crude concentrate of rare earths containing Y2O3 ~ 67%, Dy2O3 ~ 22%, etc. has been developed and tested by bench-scale counter-current operations. The challenging

A solution containing oxalate complexes of rare earths, yttrium and iron (III) is obtained during the processing of wet process phosphoric acid for uranium recovery by solvent extraction. A process is described to recover oxalic acid from such a solution. The process is based on the conversion of ir