Selective separation of α- and β-cyclodextrins by complexation/ultrafiltration using supra molecular host-guest interaction
作者： Fatma Ellouze , Bastien Seantier , Nihel Ben Amar , André Deratani
DOI: 10.1016/J.SEPPUR.2018.04.017
关键词:
摘要: This work is aimed at developing a new process to separate alpha-cyclodextrin (CD) from binary alpha-CD/beta-CD mixtures. To achieve this objective, membrane was designed with water as solvent and using the selective accommodation of guest Igepal Co-890 (IG) within beta-CD cavity. In first part, host-guest inclusion study suggested formation IG(2)/beta-CD complex in presence IG excess. Moreover, increasing IG/CD molar ratio 1.5 leads complete complexation while alpha-CD remains free. The second part devoted separation alpha- UF membranes (GH GK GE-Osmonics). influence parameters including molecular weight cut-off (MWCO), transmembrane pressure (Delta P), IG/beta-CD ratios, investigated. MWCO, Delta P, ratios respectively 1000 Da, 2 bar, 11:89 are optimized values reach an factor high 38. experimental data fits very well predicted calculated found rejection single solutions indicating that selectivity predominantly originates steric exclusion species by GH.
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