EVALUATION OF EUCALYPTUS KRAFT PULP LIGNIN THROUGH THE NITROBENZENE OXIDATION, COPPER OXIDE REDUCTION AND ACIDOLYSIS TECHNIQUES

Autor: Ventorim, Gustavo, Coelho, Alexandre, Jorge Luiz Colodette, Alves, Ericka Figueiredo, Comelato, Jaqueline Silveira
Přispěvatelé: Universidade Estadual Paulista (Unesp), Universidade Federal de Viçosa (UFV), Empresa Klabin SA
Jazyk: portugalština
Rok vydání: 2014
Předmět:
Zdroj: Web of Science
Repositório Institucional da UNESP
Universidade Estadual Paulista (UNESP)
instacron:UNESP
Ciência Florestal, Vol 24, Iss 1, Pp 205-210 (2014)
Publons
Popis: Made available in DSpace on 2015-03-18T15:56:35Z (GMT). No. of bitstreams: 0 Previous issue date: 2014-01-01Bitstream added on 2015-03-18T16:28:11Z : No. of bitstreams: 1 WOS000339685900020.pdf: 330043 bytes, checksum: a367e9551d10608c033995475262a74b (MD5) This study aimed to evaluate the sensitiveness of the information obtained for the residual lignin from Eucalyptus grandis kraft pulps analyzed through the nitrobenzene oxidation, copper oxide (CuO) reduction and acidolysis techniques. The chips were cooked, resulting pulps of kappa number 14,5 and 16,9, respectively. Both lignins' pulps were evaluated through three methods (nitrobenzene oxidation, copper oxide oxidation and acidolysis). Then, they were subjected to an oxygen delignification stage. The 16,9 kappa number pulp resulted in higher levels of non-condensed lignin structures by the acidolysis method, higher syringyl/vanillin ratios (S/V) by the nitrobenzene and copper oxide methods and better performance in the oxygen delignification stage. The different methods allowed to differ the residual lignin pulps with kappa number 14,5 and 16,9, and the nitrobenzene oxidation method showed the highest sensitiveness in this study results. Univ Estadual Paulista, BR-18409010 Itapeva, SP, Brazil Univ Fed Vicosa, Dept Engn Florestal, BR-3657000 Vicosa, MG, Brazil Empresa Klabin SA, BR-84269090 Telemaco Borba, PR, Brazil Univ Estadual Paulista, Fac Engn Guaratingueta, BR-12516410 Guaratingueta, SP, Brazil Univ Estadual Paulista, BR-18409010 Itapeva, SP, Brazil Univ Estadual Paulista, Fac Engn Guaratingueta, BR-12516410 Guaratingueta, SP, Brazil
Databáze: OpenAIRE
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