Rare earths from phosphate rock.PDFJournal of Chinese Rare Earths Society (1986)
Phosphate rock contains up to 1% lanthanide (rare earths) oxides present in isomorphous substitution for Ca2+. Lanthanum, cerium and neodymium form about 80% of the total. When the rock is leached with H2SO4 the lanthanides are mostly (about 70%) lost in the gypsum residue. When the rock is leached with HNO3 or HCI, more than 80% can be recovered without interference with fertiliser production. At an annual production of 130 million tons, phosphate rock represents an important source of lanthanides. The different methods of recovery are reviewed.
This is a Chinese translation of the article entilled, " The Recovery of Lanthanides from Phosphate Rock" published in Journal of Chemical Technology & Biotechnology 35A(1), 5-14(1985). Condensed version in Journal of Chinese Rare Earths Society 4,72-76(1986). Original article contains 67 references.
- Nitric acid leaching,
- Hydrochloric acid leaching,
Citation InformationFathi Habashi. "Rare earths from phosphate rock.PDF" Journal of Chinese Rare Earths Society Vol. 4 (1986) p. 72 - 76
Available at: http://works.bepress.com/fathi_habashi/191/