| abstract |
The present invention relates to use of an amino-containing neutral phosphine extractant of Formula I in extraction and separation of thorium, and a process of extracting and separating thorium using the amino-containing neutral phosphine extractant of Formula I, n n n n n n n n n n wherein, R 1 and R 2 are each independently selected from the group consisting of C 1 -C 12 alkyl, R 3 and R 4 are each independently selected from the group consisting of C 1-16 alkyl and hydrogen, and n is an integer of 1 to 8. |