M. Wisniewski et al., INTERFACIAL PHENOMENA IN SOLVENT-EXTRACTION OF METALS - EXTRACTION OFPALLADIUM(II), Journal of radioanalytical and nuclear chemistry, 228(1-2), 1998, pp. 109-111
4-Octylphenylamine, decyl isonicotiniate, decyl nicotiniate, decyl 2-h
ydroxyethyl sulphide and its analog with partly fluorinated alkyl grou
p were used for palladium(II) extraction from 3M HCl. The adsorption o
f these compounds at toluene/HCl solution was also studied and interpr
eted. 4-Octylphenylamine adsorbs at the hydrocarbon/HCl solution at mu
ch lower concentration range than other extractants and can be used as
a phase transfer catalyst. The addition of 4-octylphenylamine increas
es the extraction rate with esters of pyridine carboxylic acids and de
creases the time needed to obtain the equilibrium of extraction.