Selective extraction of copper, mercury, silver, and palladium ions from water using hydrophobic ionic liquids / Nicolas Papaiconomou in Industrial & engineering chemistry research, Vol. 47 n°15 (Août 2008)  

Public ISBD [article]  inIndustrial & engineering chemistry research > Vol. 47 n°15 (Août 2008) . - p. 5080–5086 Titre : Selective extraction of copper, mercury, silver, and palladium ions from water using hydrophobic ionic liquids Type de document : texte imprimé Auteurs : Nicolas Papaiconomou, Auteur ; Jong-Min Lee, Auteur ; Justin Salminen, Auteur Année de publication : 2008 Article en page(s) : p. 5080–5086 Note générale : Bibliogr. p. 5085-5086 Langues : Anglais (eng) Mots-clés : Dilute metal ions Ionic liquids Résumé : Extraction of dilute metal ions from water was performed near room temperature with a variety of ionic liquids. Distribution coefficients are reported for fourteen metal ions extracted with ionic liquids containing cations 1-octyl-4-methylpyridinium[4MOPYR]+, 1-methyl-1-octylpyrrolidinium[MOPYRRO]+, or 1-methyl-1-octylpiperidinium[MOPIP]+ and anions tetrafluoroborate[BF4]+, trifluoromethyl sulfonate[TfO]+, or nonafluorobutyl sulfonate[NfO]+. Ionic liquids containing octylpyridinium cations are good for extracting mercury ions. However, other metal ions were not significantly extracted by any of these ionic liquids. Extractions were also performed with four new task-specific ionic liquids. When these liquids contain a disulfide functional group, they are efficient and selective for mercury and copper, whereas those containing a nitrile functional group are efficient and selective for silver and palladium. En ligne : http://pubs.acs.org/doi/abs/10.1021/ie0706562 [article] Selective extraction of copper, mercury, silver, and palladium ions from water using hydrophobic ionic liquids [texte imprimé] / Nicolas Papaiconomou, Auteur ; Jong-Min Lee, Auteur ; Justin Salminen, Auteur . - 2008 . - p. 5080–5086. Bibliogr. p. 5085-5086 Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 47 n°15 (Août 2008) . - p. 5080–5086 Mots-clés : Dilute metal ions Ionic liquids Résumé : Extraction of dilute metal ions from water was performed near room temperature with a variety of ionic liquids. Distribution coefficients are reported for fourteen metal ions extracted with ionic liquids containing cations 1-octyl-4-methylpyridinium[4MOPYR]+, 1-methyl-1-octylpyrrolidinium[MOPYRRO]+, or 1-methyl-1-octylpiperidinium[MOPIP]+ and anions tetrafluoroborate[BF4]+, trifluoromethyl sulfonate[TfO]+, or nonafluorobutyl sulfonate[NfO]+. Ionic liquids containing octylpyridinium cations are good for extracting mercury ions. However, other metal ions were not significantly extracted by any of these ionic liquids. Extractions were also performed with four new task-specific ionic liquids. When these liquids contain a disulfide functional group, they are efficient and selective for mercury and copper, whereas those containing a nitrile functional group are efficient and selective for silver and palladium. En ligne : http://pubs.acs.org/doi/abs/10.1021/ie0706562

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Steel converter slag as a raw material for precipitation of pure calcium carbonate / Sanni Eloneva in Industrial & engineering chemistry research, Vol. 47 N°18 (Septembre 2008)  

Public ISBD [article]  inIndustrial & engineering chemistry research > Vol. 47 N°18 (Septembre 2008) . - p. 7104–7111 Titre : Steel converter slag as a raw material for precipitation of pure calcium carbonate Type de document : texte imprimé Auteurs : Sanni Eloneva, Auteur ; Sebastian Teir, Auteur ; Justin Salminen, Auteur Année de publication : 2008 Article en page(s) : p. 7104–7111 Note générale : Chemical engineering Langues : Anglais (eng) Mots-clés : Steel converter slag Calcium carbonate Acetic acid Résumé : In this work we study the possibility of utilizing steel converter slag, a byproduct of steel manufacturing, for production of pure calcium carbonate. The dissolution of calcium from steel converter slag by using acetic acid as a solvent and the precipitation of pure calcium carbonate from the resulting solution were experimentally investigated. It was found that, while strong solutions of acetic acid dissolve most of the calcium from the slag, weak acetic acid solutions dissolve calcium selectively. Precipitation of any substantial amount of calcium carbonate was found to require the addition of sodium hydroxide. Calcium conversion from the solution into the precipitate was as high as 86%, and the purity of the precipitate was over 99%. The calcium carbonate particles produced at low temperatures were found to have rhombohedral particle shapes, a very high brightness (98.7%), and a small particle size (mean value of 0.6 μm). En ligne : http://pubs.acs.org/doi/abs/10.1021/ie8004034 [article] Steel converter slag as a raw material for precipitation of pure calcium carbonate [texte imprimé] / Sanni Eloneva, Auteur ; Sebastian Teir, Auteur ; Justin Salminen, Auteur . - 2008 . - p. 7104–7111. Chemical engineering Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 47 N°18 (Septembre 2008) . - p. 7104–7111 Mots-clés : Steel converter slag Calcium carbonate Acetic acid Résumé : In this work we study the possibility of utilizing steel converter slag, a byproduct of steel manufacturing, for production of pure calcium carbonate. The dissolution of calcium from steel converter slag by using acetic acid as a solvent and the precipitation of pure calcium carbonate from the resulting solution were experimentally investigated. It was found that, while strong solutions of acetic acid dissolve most of the calcium from the slag, weak acetic acid solutions dissolve calcium selectively. Precipitation of any substantial amount of calcium carbonate was found to require the addition of sodium hydroxide. Calcium conversion from the solution into the precipitate was as high as 86%, and the purity of the precipitate was over 99%. The calcium carbonate particles produced at low temperatures were found to have rhombohedral particle shapes, a very high brightness (98.7%), and a small particle size (mean value of 0.6 μm). En ligne : http://pubs.acs.org/doi/abs/10.1021/ie8004034

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