C - Chemistry – Metallurgy – 22 – B
Patent
C - Chemistry, Metallurgy
22
B
C22B 59/00 (2006.01) C22B 3/38 (2006.01) C22B 3/44 (2006.01)
Patent
CA 2277417
Using an organophosphonic/organothiophosphonic acid, and optionally, an organophosphinic/organothiophosphinic acid as extractant, efficiency of stripping of lanthanide is improved by varying the concentration of phosphine oxides or esters of phosphorus in the extraction solution. Namely, the stripping efficiency of hydrochloric acid is increased by adding or increasing the concentration of phosphine oxide or ester of phosphorus in the extractant solution; and the stripping efficiency of nitric acid is increased by removing or decreasing the concentration of phosphine oxide or ester of phosphorus in the extractant solution.
Jakovljevic Boban
Nucciarone Donato
Pagnucco Christina
Rickelton William
Cytec Canada Inc.
Cytec Technology Corp.
Smart & Biggar
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