Modification of phenolic resins containing crown ether units
| Autor: | H Zunza, J. Bartulin, M. Parra, A. Ramírez |
|---|---|
| Rok vydání: | 1991 |
| Předmět: |
chemistry.chemical_classification
Aqueous solution Polymers and Plastics Sodium Chemical modification chemistry.chemical_element General Chemistry Azo coupling Condensed Matter Physics chemistry.chemical_compound stomatognathic system chemistry Nitration Materials Chemistry Organic chemistry Lithium Methanol Crown ether |
| Zdroj: | Polymer Bulletin. 27:251-256 |
| ISSN: | 1436-2449 0170-0839 |
| DOI: | 10.1007/bf00294528 |
| Popis: | Phenolic resins containing 13-crown-4 and 9-crown-3 units (1) were modified by coupling and nitration in heterogeneous phase. The chromogenic resins extract Li+ selectively and efficiently, and no extractions of Na+ were found. The extractions were carried out with aqueous solutions of lithium and aqueous solutions of sodium chloride at pH=7 and 11. Finally, re-extraction analysis of lithium in methanol and water were made. Resins release partially the cation. Major re-extraction was obtained with methanol. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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