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Optimization of galactoglucomannans and acidic arabinans recovery in softwood / Lyne Desharnais in Industrial & engineering chemistry research, Vol. 50 N° 24 (Décembre 2011) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 50 N° 24 (Décembre 2011) . - pp. 14217-14220 Titre : Optimization of galactoglucomannans and acidic arabinans recovery in softwood Type de document : texte imprimé Auteurs : Lyne Desharnais, Auteur ; Fang Du, Auteur ; Nicolas Brosse, Auteur Année de publication : 2012 Article en page(s) : pp. 14217-14220 Note générale : Chimie industrielle Langues : Anglais (eng) Mots-clés : Softwood  Optimization Résumé : Autohydrolysis of softwood chips, used as raw material in a paper mill, was studied to simulate one of the aspects of industrial hydrolytic steps of a thermomechanical pulping process. The compositions of the pulps and of the hydrolysates were determined as a function of the residence time and the severity of the treatment. It was found that acidic arabinogalactans were largely affected and depolymerized, even at low severity (log(R0) < 2). The percentage of residual arabinans in the pulp after hydrolysis seemed be a good indicator of the severity of the treatment and can provide an effective guide for an optimization of the industrial process. A hydrolytic step performed at a severity oflog(R0) = 1.8 resulted in the extraction of∼ 100% of the water-soluble acidic arabinogalactans, which constitutes the main part of the αanionic trash" released in mechanical pulping. DEWEY : 660 ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=25299893 [article] Optimization of galactoglucomannans and acidic arabinans recovery in softwood [texte imprimé] / Lyne Desharnais, Auteur ; Fang Du, Auteur ; Nicolas Brosse, Auteur . - 2012 . - pp. 14217-14220. Chimie industrielle Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 50 N° 24 (Décembre 2011) . - pp. 14217-14220 Mots-clés : Softwood  Optimization Résumé : Autohydrolysis of softwood chips, used as raw material in a paper mill, was studied to simulate one of the aspects of industrial hydrolytic steps of a thermomechanical pulping process. The compositions of the pulps and of the hydrolysates were determined as a function of the residence time and the severity of the treatment. It was found that acidic arabinogalactans were largely affected and depolymerized, even at low severity (log(R0) < 2). The percentage of residual arabinans in the pulp after hydrolysis seemed be a good indicator of the severity of the treatment and can provide an effective guide for an optimization of the industrial process. A hydrolytic step performed at a severity oflog(R0) = 1.8 resulted in the extraction of∼ 100% of the water-soluble acidic arabinogalactans, which constitutes the main part of the αanionic trash" released in mechanical pulping. DEWEY : 660 ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=25299893