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Titolo:
The effect of polysulphide pre-treatment and cooking parameters on the chemical properties and TCF bleachability of alkaline pulps
Autore:
Al-Dajani, WW; Gellerstedt, G;
Indirizzi:
Royal Inst Technol, Dept Pulp & Paper Chem & Technol, Stockholm, Sweden Royal Inst Technol Stockholm Sweden r Chem & Technol, Stockholm, Sweden
Titolo Testata:
PULP & PAPER-CANADA
fascicolo: 8, volume: 102, anno: 2001,
pagine: 44 - 48
SICI:
0316-4004(200108)102:8<44:TEOPPA>2.0.ZU;2-A
Fonte:
ISI
Lingua:
ENG
Soggetto:
HEXENEURONIC ACID GROUPS; HEXENURONIC ACID; XYLAN; DEGRADATION; SOFTWOOD;
Keywords:
softwoods; chips; pretreatment; alkaline pulps; pulp properties; chemical properties; polysulphides; kraft pulps; yield; viscosity; brightness; bleachability; bleached pulps; chlorine-free bleaching;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Engineering, Computing & Technology
Citazioni:
19
Recensione:
Indirizzi per estratti:
Indirizzo: Al-Dajani, WW Royal Inst Technol, Dept Pulp & Paper Chem & Technol, Stockholm, Sweden Royal Inst Technol Stockholm Sweden ol, Stockholm, Sweden
Citazione:
W.W. Al-Dajani e G. Gellerstedt, "The effect of polysulphide pre-treatment and cooking parameters on the chemical properties and TCF bleachability of alkaline pulps", PULP PAPER, 102(8), 2001, pp. 44-48

Abstract

The effect of pre-treating softwood chips with polysulphide on the chemical properties of the resulting pulp has been investigated. During subsequentpulping after such pre-treatment, high alkali content is maintained in thecooking liquor and, consequently, an unbleached pulp with a decreased amount of hexenuronic acid is obtained. As compared to other kraft pulps in this study, a polysulphide pre-treatment gives high cooking field, a high viscosity and brightness for the unbleached pulp and a pulp of good bleachability.

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Documento generato il 29/11/20 alle ore 17:16:49