Lewatit® TP 272 is a crosslinked polystyrene based macroporous solvent impregnated resin (SIR) which contains bis-(2,4,4-trimethylpentyl-) phosphinic acid.
This liquid extractant is directly incorporated during the formation of the copolymer.
It was preliminary developed for nickel electrolyte purification (cobalt extraction from nickel solution). Generally it can be assumed that ions which can be removed with bis-(2,4,4-trimethylpentyl-) phosphinic acid will also be adsorbed by Lewatit® TP 272.
The selectivity order for the extraction of cations from sulfate containing solutions can be assumed as follows:
Fe3+ > V4+ > Zn2+ > Al3+ > Cu2+ > Mn2+ > Co2+ > Mg2+ > Ca2+ > Ni2+
Advantages of this product compared to conventional solvent extraction are:
Important advice: