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Titolo:
Sulfuric acid bleaching of kraft pulp III: reactivity of kraft pulping-resistant structures under acidic conditions
Autore:
Ikeda, T; Tomimura, Y; Magara, K; Ishihara, M; Hosoya, S;
Indirizzi:
Forestry & Forest Prod Res Inst, Wood Chem Div, Tsukuba Norin Kenkyu Dan, Ibaraki 3058687, Japan Forestry & Forest Prod Res Inst Tsukuba Norin Kenkyu Dan Ibaraki Japan 3058687 Univ Tsukuba, Inst Agr & Forest Engn, Tsukuba, Ibaraki 305, Japan Univ Tsukuba Tsukuba Ibaraki Japan 305 Engn, Tsukuba, Ibaraki 305, Japan
Titolo Testata:
JOURNAL OF WOOD SCIENCE
fascicolo: 5, volume: 45, anno: 1999,
pagine: 417 - 424
SICI:
1435-0211(1999)45:5<417:SABOKP>2.0.ZU;2-P
Fonte:
ISI
Lingua:
ENG
Soggetto:
MODEL COMPOUNDS; XYLOOLIGOSACCHARIDES;
Keywords:
kraft pulp; sulfuric acid; lignin-carbohydrate complex; vinyl ether; hexeneuronic acid;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Engineering, Computing & Technology
Citazioni:
12
Recensione:
Indirizzi per estratti:
Indirizzo: Hosoya, S Forestry & Forest Prod Res Inst, Wood Chem Div, POB 16, Tsukuba Norin Kenkyu Dan, Ibaraki 3058687, Japan Forestry & Forest Prod Res Inst POB 16 Tsukuba Norin Kenkyu Dan Ibaraki Japan 3058687
Citazione:
T. Ikeda et al., "Sulfuric acid bleaching of kraft pulp III: reactivity of kraft pulping-resistant structures under acidic conditions", J WOOD SCI, 45(5), 1999, pp. 417-424

Abstract

To investigate the bleaching mechanism, a lignin-carbohydrate complex (LCC) model compound, a vinyl ether-type lignin model dimer, and a hexeneuronicacid model compound were treated with dilute sulfuric acid of different pHs. Beech kraft pulp and red pine kraft pulp were also treated with dilute sulfuric acid and then extracted with aqueous alkali. The amount of hexeneuronic acid degradation products in acid effluents and lignin dissolved in alkali effluents were determined. It was found that the benzyl ether-type LCCbond and the vinyl ether bond in lignin were effectively cleaved under thepH where sulfuric acid bleaching of kraft pulp was effective. Hexeneuronicacid group was also effectively degraded during sulfuric acid bleaching. In beech kraft pulp bleaching, both lignin removal and hexeneuronic acid removal contributed to the kappa number reduction. In red pine bleaching, the contribution of hexeneuronic acid removal was negligible, and most of the kappa number reduction was achieved by the lignin removal.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 29/11/20 alle ore 06:44:52