The separation of the rare earths neodymium and praseodymium by precipitation as chloride
Institution: | Missouri University of Science and Technology |
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Department: | |
Year: | 1947 |
Record ID: | 1550494 |
Full text PDF: | http://hdl.handle.net/10355/18057 |
"The purpose of this thesis is to provide a means of preparing highly purified samples of neodymium and praseodymium compounds when the material to be refined already exists in a state of approximate purity. The method described cannot be profitably used to purify the individual rare earths without first concentrating them. The process is not intended to be quantitative, for it is a fractional crystallization technique using a concentrated hydrochloric acid medium" – Introduction, p. 1.