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The extraction of copper(II) ions with liquid anion exchangers using salicylate as complex-forming agent

✍ Scribed by E. Papp; J. Inczédy

Publisher
Elsevier Science
Year
1974
Tongue
English
Weight
546 KB
Volume
102
Category
Article
ISSN
1873-3778

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✦ Synopsis

The extraction of copper(I1) ions in the presence of salicylate ions, using a solution of the salicylate form of Aliquat 336 in chloroform, involves two simultaneous processes depending on the pH and on the salicylate concentration of the aqueous phase. The composition of the species formed in the chloroform phase can be described as follows: Cu(HL),R.,N and Cu(HL)LR4N, where HL is the monovalent salicylate anion. The corresponding extraction constants are: log Kf = 6.47 & 0.03; log Kg = 1.80 k 0.01. In solutions of pH > 9, if the chloride form of Aliquat 336 is used, a compound of composition CUL~(R,,N)~ is also formed; the extraction constant found for this species is log KS = 3.85 & 0.05.

📜 SIMILAR VOLUMES

Separation of optical isomers by ion-exc
Separation of optical isomers by ion-exchange chromatography using copper(II) ions as complex-forming agents
✍ J. Gaál; J. Inczédy 📂 Article 📅 1974 🏛 Elsevier Science 🌐 English ⚖ 364 KB

On the basis of the differences between the stability constants of complexes of D-and L-aminodiols with copper ions, an ion-exchange chromatographic method using copper(I1) ions as complex-forming agents was developed for the quantitative separation of pairs of optical isomers. The stability constan