|
S. N. Igumnov, A. V. Valkov
Separation of
rare earth elements in the system: tributyl phosphate – Ln(NO3)3
– Ca(NO3)2 in the counter current process
Abstract
The 40th step
extraction process of separation of REE according to
the line praseodymium-cerium with use of mixer – settler extractors in the
system of 100% TBP – Ln(NO3)3 – Ca(NO3)2
is realized. Lanthanum – cerium concentrate containing less than 0,03% of other
rare-earth elements is received. The process flow diagram of separation of the
rare-earth concentrate proceeded from phosphogypsum
is considered.
Key words: extraction, phosphogypsum, rare-earth
elements, tributyl phosphate, calcium nitrate, extraction cascade, separation
coefficient.
Copyright (C) Chemistry Dept., Moscow State University, 2002
|
|
