Studies on kinetics and reuse of spent liquor in the TEMPO-mediated selective oxidation of mechanical pulp / Lianshan Mao in Industrial & engineering chemistry research, Vol. 49 N° 1 (Janvier 2010)  

Public ISBD [article]  inIndustrial & engineering chemistry research > Vol. 49 N° 1 (Janvier 2010) . - pp. 113–116 Titre : Studies on kinetics and reuse of spent liquor in the TEMPO-mediated selective oxidation of mechanical pulp Type de document : texte imprimé Auteurs : Lianshan Mao, Auteur ; Pu Ma, Auteur ; Kweinam Law, Auteur Année de publication : 2010 Article en page(s) : pp. 113–116 Note générale : Industrail chemistry Langues : Anglais (eng) Mots-clés : Studies--kinetics--reuse--spent--liquor--TEMPO-mediated selective--oxidation--mechanical pulp Résumé : The kinetics and reuse of spent liquor in the TEMPO-mediated oxidation of mechanical pulp have been studied. It was found that the oxidation reaction of the mechanical pulp by the 2,2,6,6-tetramethyl piperidine-1-oxyl radical (TEMPO)−NaBr−NaOCl system can be approximately described by first-order kinetics with respect to TEMPO and NaBr. In the concentration range used, the rate constant k is directly proportional to the concentration of TEMPO and NaBr, whereas the concentration of NaOCl determines the end of conversion of the primary alcohol groups on the mechanical pulp into carboxylic acid groups. It was also found that the spent reaction liquor can be recycled and reused with reinforced addition of NaOCl without additional TEMPO and NaBr and remains effective in generating carboxylic acid groups on mechanical pulp. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie901039r [article] Studies on kinetics and reuse of spent liquor in the TEMPO-mediated selective oxidation of mechanical pulp [texte imprimé] / Lianshan Mao, Auteur ; Pu Ma, Auteur ; Kweinam Law, Auteur . - 2010 . - pp. 113–116. Industrail chemistry Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 49 N° 1 (Janvier 2010) . - pp. 113–116 Mots-clés : Studies--kinetics--reuse--spent--liquor--TEMPO-mediated selective--oxidation--mechanical pulp Résumé : The kinetics and reuse of spent liquor in the TEMPO-mediated oxidation of mechanical pulp have been studied. It was found that the oxidation reaction of the mechanical pulp by the 2,2,6,6-tetramethyl piperidine-1-oxyl radical (TEMPO)−NaBr−NaOCl system can be approximately described by first-order kinetics with respect to TEMPO and NaBr. In the concentration range used, the rate constant k is directly proportional to the concentration of TEMPO and NaBr, whereas the concentration of NaOCl determines the end of conversion of the primary alcohol groups on the mechanical pulp into carboxylic acid groups. It was also found that the spent reaction liquor can be recycled and reused with reinforced addition of NaOCl without additional TEMPO and NaBr and remains effective in generating carboxylic acid groups on mechanical pulp. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie901039r

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