Extraction and Recovery of Cerium from Rare Earth Ore by Solvent Extraction

Abstract

Rare earth elements are widely found in many minerals, some of which, such as bastnaesite, monazite, and xenotime, are of great commercial value. Cerium (Ce) is the rare earth element with the highest content in light rare earth ore. Solvent extraction is the most effective and efficient method to recover and separate Ce from other light rare earth elements. After acid leaching of rare earth minerals, leaching solution was obtained, and cerium oxide of products of high purity was obtained by extraction and stripping. It is well known that Ce(IV) can be easily separated from the other RE(III) by adopting the traditional solvent extraction. Based on this principle, the clean process of oxidation roasting and Ce(IV) separation for Sichuan bastnaesite was developed. And then, a preliminary flow sheet of two-step oxidation and extraction of Ce(IV) for Bayan Obo mixed rare earth ores was further proposed.

The Behaviour of Rare Earth Elements from South African Coal Fly Ash during Enrichment Processes: Wet, Magnetic Separation and Zeolitisation

“…The most abundant REE in the earth's upper crust is Ce (63 ppm), typically mined from naturally occurring mineral ore resources such as monazite and bastnäsite. Comparatively, CFA is almost 3 times more abundant in Ce (174 ppm) than natural resources in the earth's crust [4,53,54]. The total REE abundance in CFA was 490.5 ppm, i.e., more than twice the abundance of REEs in the earth's upper crust (183.1 ppm) [1,4,5].…”

Synthesize of Poly (acrylamide-co-itaconic/TiO2) Nanocomposite for Ce(III) Sorption from Monazite Leachate

“…The concentration of REEs solutions is determined by Inductive Coupled Plasma Optical Emission Spectrometer type (Prodig Axial high dispersion ICP-OES model, USA and the [5] concentration of Ce(III) is measured by an atomic absorption spectrophotometer (Buck Scientific, VGP 210).…”

Synthesize of Poly (Acrylamide-Co-Itaconic/TiO2) Nanocomposite for Ce(III) Sorption from Monazite Leachate

“…Emission Spectrometer type (Prodig Axial high dispersion ICP-OES model, USA and the [5] concentration of Ce(III) is measured by an atomic absorption spectrophotometer (Buck Scientific, VGP 210).…”

“…Monazite, lanthanide, xenotime, bastnaesite, allanite, loparite and phosphate rocks are all rich in REEs [4]. Cerium (Ce) is the RE element with the highest concentration [2] in light RE ores, CeO 2 /∑REO in bastnaesite (REFCO 3 ) reaches 50 percent, while CeO 2 / ∑REO in monazite (REPO 4 ) reaches 45-50% [5].…”