## Abstract On a établi les conditions dans lesquelles se produit, à l'anode, un dépôt pelliculaire — formé par un mélange de sulfate et de peroxyde de platine — dans l'électrolyse de l'acide sulfurique au moyen d'un courant ondulé.
Extraction des complexes des lanthanidestrivalents avec différents acides aminopolyacétiques sur écchangeur d'ions préconditionné
✍ Scribed by F. Schoebrechts; E. Merciny; G. Duyckaerts
- Publisher
- Elsevier Science
- Year
- 1973
- Tongue
- English
- Weight
- 964 KB
- Volume
- 79
- Category
- Article
- ISSN
- 1873-3778
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✦ Synopsis
The anion-exchange resin Dowex I X4 (100-200 mesh, Cl-form) was converted into the HEDTA or NTA form and the fixation of different protonated forms was studied over a wide pH range.
The distribution of trivalent lanthanides between these resins and a solution of HEDTA or EDTA was then investigated, The experimental results indicate that the extraction mechanism is a chelating reaction between HEDTA or NTA sorbed on the resin and the I : I complex Me(HEDTA) or Me(EDTA) in solution. The kinetics of extraction and the values of HETP obtained are in good agreement with a chelating reaction.
📜 SIMILAR VOLUMES
0‐, __m__‐ and __p__‐sulfophenylphosphoric acids have been prepared from PC1~5~ and the corresponding phenolsulfonic acids. The rates of hydrolysis of these phosphoric esters at pH 0 (HCl 1N), 4,5 and 14 (NaOH 1N) and at 100° have been established.