Produção Nacional
Revisado por pares
Study of the bleachability of eucaliptus kraft pulp
2015; UNIVERSIDADE FEDERAL DE SANTA MARIA; Volume: 25; Issue: 1 Linguagem: Inglês
10.1590/1980-509820152505185
ISSN1980-5098
AutoresDanila Morais de Carvalho, Marcelo Rodrigues da Silva, Jorge Luiz Colodette,
Tópico(s)Plant Surface Properties and Treatments
ResumoThe aim of this study was to evaluate how the pulp bleachability ability is correlated with the wood chemical characteristics, the cooking conditions, the kappa number of the brown pulp and the bleaching sequences, based on the pulp bleached brightness, viscosity, bleaching chemical consumption and bleachability. The eucalyptus wood (A, B, and C), appropriately characterized as the chemical constituents (holocellulose content, insoluble and soluble lignin content, total extractive content, ash and insoluble ash in hydrochloric acid) were used for pulp production by modified kraft cooking, using two different pulping conditions: Condition I (PI) 16.5% effective alkali, 30% sulfide, and 155oC cooking temperature; and Condition 1 Engenheira Florestal, Mestre em Ciencia Florestal, doutoranda em Ciencia Florestal, Departamento de Engenharia Florestal, Universidade Federal de Vicosa, CEP 36570-900, Vicosa (MG), Brasil. carvalho.danila@gmail.com 2 Engenheiro Quimico, Dr., Especialista de Processo da Empresa Fibria Unidade Jacarei/ Rod. Gal Euryale Jesus Zerbini, Km 84, SP 66, Sao Silvestre, CEP 12340-010, Jacarei (SP), Brasil. marcelo.silva@fibria.com.br 3 Engenheiro Florestal, PhD., Professor Titular do Departamento de Engenharia Florestal, Universidade Federal de Vicosa, CEP 36570-900, Vicosa (MG), Brasil. colodett@ufv.br Recebido para publicacao em 30/04/2011 e aceito em 3/06/2013
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