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Recovery and separation of rare-earth elements, barium, and strontium from bastnasite with sulfuric acid.
USBM 1974 Jan; :1-10
The Bureau of Mines conducted a bench-scale investigation of a concentrated H2SO4 reaction for recovering and separating rare-earth elements, barium, and strontium from a bastnasite ore and byproduct. Barium and strontium were dissolved in the concentrated acid and precipitated as a mixed product by water dilution. Separation of strontium from barium was effected by reaction with Na2CO3 solution, followed by a dilute acid leach of the SrCO3 formed. After removing the barium and strontium from bastnasite ore, the rare-earth elements were roasted to water-soluble sulfates. The rare-earth sulfate solution was subsequently processed by solvent extraction to produce rare-earth oxides low in lead and magnesium.
Chemical-extraction; Chemical-reactions; Chemical-synthesis; Mining-industry
IH; Report of Investigations
NTIS Accession No.
U.S. Bureau of Mines
Page last reviewed: March 11, 2019
Content source: National Institute for Occupational Safety and Health Education and Information Division