Data/hora: 12/06/2024 06:51:09

Provedor de dados: | 190
País: | Brazil

Título:

Anthraquinone effect on kraft cooking curve for the wood  of Eucalyptus grandis x Eucalyptus urophylla hybrid

Efeito da antraquinona na curva de cozimento kraft para madeira do híbrido Eucalyptus grandis x Eucalyptus urophylla

Autores: | Vivian, Magnos Alan; da Silva Júnior, Francides Gomes.
Data: | 2017-12-29
Ano: | 2017
Palavras-chave: | Pulping; Cooking additive; Wood pulp Recursos Florestal; Celulose e Papel Fabricação de pasta celulósica; Aditivo de cozimento; Polpa de madeira.
Resumo: | This study aimed to evaluate the effects of anthraquinone addition in the cooking curve, with different loads of reagents, through the kraft pulping process, of Eucalyptus grandis x Eucalyptus urophylla wood, to infer about the process parameters. The wood was transformed into chips and classified to conduct the kraft cooking curves. The applied loads were from 10% to 24% of active alkali, with an anthraquinone charge of 0.05% (on dry wood). We evaluated raw and screened yield, reject content, kappa number (delignification level) and residual active alkali. We observed that the addition of anthraquinone did not affect the process raw yield, but increased the screened yield by reducing reject content, especially for low loads of active alkali (10% and 12%). Another effect observed was the reduction of the kappa number with the addition of anthraquinone, which indicates the increase of the wood delignification rate. This is reinforced by the lower residual active alkali, which implies greater use of reagents in the process.
Tipo: | Info:eu-repo/semantics/article
Idioma: | Português

Identificador:

http://pfb.cnpf.embrapa.br/pfb/index.php/pfb/article/view/1267

10.4336/2017.pfb.37.92.1267

Editor: | Embrapa Florestas

Relação:

http://pfb.cnpf.embrapa.br/pfb/index.php/pfb/article/view/1267/604

http://pfb.cnpf.embrapa.br/pfb/index.php/pfb/article/downloadSuppFile/1267/939

http://pfb.cnpf.embrapa.br/pfb/index.php/pfb/article/downloadSuppFile/1267/940

Formato: | application/pdf

Fonte:

Pesquisa Florestal Brasileira; v. 37, n. 92 (2017): out./dez.; 457-464

Brazilian Journal of Forestry Research; v. 37, n. 92 (2017): out./dez.; 457-464

1983-2605

1809-3647

Fonte: | http://creativecommons.org/licenses/by-nc-nd/4.0