Open AccessSolvent Extraction of Phthalate Isomer Dianions by the Use of Dicationic Anion-Exchange Extractants
Author(s) -
Akira Ohki,
Masanobu Yamura,
Yuko Sumiyoshi,
Makoto Takagi,
Shigeru Miyagawa
Publication year - 1990
Publication title -
analytical sciences
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.392
H-Index - 73
eISSN - 1348-2246
pISSN - 0910-6340
DOI - 10.2116/analsci.6.291
Subject(s) - chemistry , phthalate , cationic polymerization , phosphonium , extraction (chemistry) , ion exchange , solvent , solvent extraction , ion , inorganic chemistry , polymer chemistry , chromatography , organic chemistry
The solvent extraction of p-nitrophenol from aqueous acid solutions into cyclohexane with trioctylphosphine (TOP), trioctylphosphine oxide (TOPO), triphenylphosphine (TPP), triphenylphosphine oxide (TPPO) and triphenylphosphine sulfide (TPPS) was examined. The results were compared with those with trioctylamine (TOA). The extracted p-nitrophenol was found to form a 1;1 hydrogen-bonded associate with bases in the organic phase. The associationconstant in the organic phase was greater in the order TOPO>TPPO>TOP>TOA>TPPS>TPP. The ability of an extractant for an acid is considered from its chemical properties as a base in the organic phase. It was concluded that it may be related to the association constant with the acid in the solvent