Recovery of nickel from sulphate media by batch pertraction in a rotating film contactor using Cyanex 302 as a carrier

Bases and Basic Materials in Industrial and Environmental Chemistry: A Review of Commercial Processes

“…The active components of Cyanex 301 and Cyanex 302 are bis(2,4,4-trimethylpentyl) dithiophosphinic acid) and bis(2,4,4-rimethylpentyl)monothiophosphinic acids, respectively. Dibutyldithiophosphoric acid, diisodecylphosphoric acid (DIDPA), 2-ethylhexyl hydrogen 2-ethylhexyl phosphonate, and 2-ethylhexyl phosphonic acid mono-2-ethylhexyl ester (developed by the Daihachi Chemical Industry as the commercial product PC 88A), as well as some sodium salts of organophosphorus compounds are used, for example, for nickel recovery and nickel/cobalt separation . Also, the superbasic P4 compound, a polyphosphazene, is commercialized.…”

Highly efficient and selective transport of Hg2+ ions through a bulk liquid membrane containing Cyanex 301 as carrier

“…These reagents substituted sulfur for oxygen in organophophorus acids (PS) and provide various properties to metal extraction, as predicted by the Hard–Soft Acid–Base (HSAB) principle23, 24 In the last two decades, some alkylphosphines of the Cyanex series have gained prominence as metal ion extractants due to their low aqueous solubility and resistance to hydrolysis. Concerning the two recently commercialized extractants Cyanex 301 [whose active component is the bis(2,4, 4‐trimethylpentyl)dithiophosphinic acid] and Cyanex 302 [with bis(2,4,4‐trimethylpentyl)monothiophos phinic acid as an active component] no comprehensive information is available 25. The presence of soft donor atoms in ligands results in a considerable increase in stability of their complexes with soft cations such as mercury and silver ions while diminishing the stability of their alkali, alkaline earth metal ions and hard transition metal ion complexes 26, 27.…”