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Selective separation of wood components based on hansen’s theory of solubility / Huaming Yu in Industrial & engineering chemistry research, Vol. 50 N° 12 (Juin 2011) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 50 N° 12 (Juin 2011) . - pp. 7513-7519 Titre : Selective separation of wood components based on hansen’s theory of solubility Type de document : texte imprimé Auteurs : Huaming Yu, Auteur ; Jia Hu, Auteur ; Jie Chang, Auteur Année de publication : 2011 Article en page(s) : pp. 7513-7519 Note générale : Chimie industrielle Langues : Anglais (eng) Mots-clés : Solubility  Wood Résumé : A new method for selective separation of wood components is presented. Based on Hansen's theory of solubility, ionic liquid (IL) 1-butyl-3-methylimidazolium bromine ([Bmin]Br) was mixed with aqueous ethanol HBr the acid catalyst in the degradation of wood components, was found to form in situ by ion exchange between IL and organic acid. The hydrogen bonding capacity of the mixture was enhanced as the presence of IL, which led to the promotion of the solubilization of lignin and other products from carbohydrates hydrolysis. The data showed that, variations of the IL concentration caused cellulose to be separated from pine wood with a purity of more than 94%, or to be hydrolyzed and converted into saccharides together with hemicellulose. Because of the complete hydrolysis of hemicellulose, the cross-linked matrix oflignin and hemicellulose was destroyed, which led to the isolation of lignin with a high purity of about 93%. DEWEY : 660 ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=24239067 [article] Selective separation of wood components based on hansen’s theory of solubility [texte imprimé] / Huaming Yu, Auteur ; Jia Hu, Auteur ; Jie Chang, Auteur . - 2011 . - pp. 7513-7519. Chimie industrielle Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 50 N° 12 (Juin 2011) . - pp. 7513-7519 Mots-clés : Solubility  Wood Résumé : A new method for selective separation of wood components is presented. Based on Hansen's theory of solubility, ionic liquid (IL) 1-butyl-3-methylimidazolium bromine ([Bmin]Br) was mixed with aqueous ethanol HBr the acid catalyst in the degradation of wood components, was found to form in situ by ion exchange between IL and organic acid. The hydrogen bonding capacity of the mixture was enhanced as the presence of IL, which led to the promotion of the solubilization of lignin and other products from carbohydrates hydrolysis. The data showed that, variations of the IL concentration caused cellulose to be separated from pine wood with a purity of more than 94%, or to be hydrolyzed and converted into saccharides together with hemicellulose. Because of the complete hydrolysis of hemicellulose, the cross-linked matrix oflignin and hemicellulose was destroyed, which led to the isolation of lignin with a high purity of about 93%. DEWEY : 660 ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=24239067