SYNERGISTIC EXTRACTION OP CADMIUM AND ZINC FROM NITRATE MEDIUM WITH 3-PHENYL-4-BENZOYLISOXAZOL-5-ONE IN THE PRESENCE OF METHYL-TRI-n-OCTYLAMMONIUM NITRATE IN CHLOROFORM AND TOLUENE
The synergistic extraction of cadmium and zinc, from 1M NaN03 aqueous solutions, with the acidic chelating extractant 3-phenyl-4-benzoylisoxazol-5-one (HPBI), in the presence of the nitrate salt of aliquat 336 (methyl-tri-n-octylammonium nitrate named TOMA.NO 3 ), has been studied in chloroform and...
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| Published in: | Solvent extraction and ion exchange 1997-08, Vol.15 (5), p.819-835 |
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| Main Authors: | , , |
| Format: | Article |
| Language: | eng |
| Online Access: | Get full text |
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| Summary: | The synergistic extraction of cadmium and zinc, from 1M NaN03 aqueous solutions, with the acidic chelating extractant 3-phenyl-4-benzoylisoxazol-5-one (HPBI), in the presence of the nitrate salt of aliquat 336 (methyl-tri-n-octylammonium nitrate named TOMA.NO
3
), has been studied in chloroform and toluene. The extracted species are TOMA.M(PBI)3 with M = Cd, zn. The synergistic extraction is described by the following equilibria:
The difference observed between toluene and chloroform is mainly due to the higher distribution constant of HPBI in chloroform (logK
d
= 3.0) than in toluene (logK
d
= 2.3). The Zn extraction is more enhanced by TOMA.NO
3
than the Cd one, contrary to what is observed in the synergistic extraction using 1-phehyl-3-methyl-4-benzoylpyrazol-5-one (HPMBP). |
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| ISSN: | 0736-6299 1532-2262 |