Process for separation of the rare earths by solvent extraction

Patent · 04 April 1977

OSTI ID:862790

Mason, George W ^[1]; Lewey, Sonia ^[2]

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1. Clarendon Hills, IL
2. Joliet, IL

Production rates for solvent extraction separation of the rare earths and yttrium from each other can be improved by the substitution of di(2-ethylhexyl) mono-thiophosphoric acid for di(2-ethylhexyl) phosphoric acid. The di(2-ethylhexyl) mono-thiophosphoric acid does not form an insoluble polymer at approximately 50% saturation as does the former extractant, permitting higher feed solution concentration and thus greater throughput.

• Research Organization: Argonne National Laboratory (ANL), Argonne, IL
• Assignee: United States of America as represented by United States Energy (Washington, DC)
• Patent Number(s): US 4016237
• OSTI ID: 862790
• Country of Publication: United States
• Language: English

Related Subjects

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2-ethylhexyl
50
acid
approximately
concentration
earths
extractant
extraction
feed
feed solution
form
former
improved
insoluble
insoluble polymer
mono-thiophosphoric
permitting
phosphoric
phosphoric acid
polymer
process
production
production rate
production rates
rare
rare earth
rare earths
rates
saturation
separation
soluble poly
soluble polymer
solution
solution concentration
solvent
solvent extract
solvent extraction
substitution
throughput
yttrium