Documents disponibles écrits par cet auteur

Synergistic extraction of glycolic acid from glycolonitrile hydrolysate / Shi Yunhai in Industrial & engineering chemistry research, Vol. 50 N° 13 (Juillet 2011) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 50 N° 13 (Juillet 2011) . - pp. 8216-8224 Titre : Synergistic extraction of glycolic acid from glycolonitrile hydrolysate Type de document : texte imprimé Auteurs : Shi Yunhai, Auteur ; Sun Houyong, Auteur ; Cao Haiyong, Auteur Année de publication : 2011 Article en page(s) : pp. 8216-8224 Note générale : Chimie industrielle Langues : Anglais (eng) Mots-clés : Synergism Résumé : In this work, glycolic acid was separated from glycolonitrile hydrolysate by an extractant consisting of tri-n-octylamnie, tri-n-butyl phosphate, n-octanol, and sulfonated kerosene. In a single equilibrated apparatus, the synergistic effect of the extractant, the influence of diluents composition, the temperature, and the concentration of ammonium sulfate in the hydrolysate on the distribution coefficient of glycolic acid were studied. The extractant loading of glycolic acid was back-extracted by pure water at high temperature. The results show that synergistic effects appear below 1.56 mol·L-1 of glycolic acid. When the concentration of glycolic acid is higher than 3.42 mol·L-1 there is either little or no synergism effect. The quantity of ammonium sulfate in the hydrolysate has little effect on the extraction efficiency. Based on material balance, a mathematical model for the synergistic extraction was established. In a Φ50 mm Kühni extraction column, glycolic acid was separated continuously from the hydrolysate. DEWEY : 660 ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=24332146 [article] Synergistic extraction of glycolic acid from glycolonitrile hydrolysate [texte imprimé] / Shi Yunhai, Auteur ; Sun Houyong, Auteur ; Cao Haiyong, Auteur . - 2011 . - pp. 8216-8224. Chimie industrielle Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 50 N° 13 (Juillet 2011) . - pp. 8216-8224 Mots-clés : Synergism Résumé : In this work, glycolic acid was separated from glycolonitrile hydrolysate by an extractant consisting of tri-n-octylamnie, tri-n-butyl phosphate, n-octanol, and sulfonated kerosene. In a single equilibrated apparatus, the synergistic effect of the extractant, the influence of diluents composition, the temperature, and the concentration of ammonium sulfate in the hydrolysate on the distribution coefficient of glycolic acid were studied. The extractant loading of glycolic acid was back-extracted by pure water at high temperature. The results show that synergistic effects appear below 1.56 mol·L-1 of glycolic acid. When the concentration of glycolic acid is higher than 3.42 mol·L-1 there is either little or no synergism effect. The quantity of ammonium sulfate in the hydrolysate has little effect on the extraction efficiency. Based on material balance, a mathematical model for the synergistic extraction was established. In a Φ50 mm Kühni extraction column, glycolic acid was separated continuously from the hydrolysate. DEWEY : 660 ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=24332146