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Titolo:
ALKALINE EXTRACTION OF OZONE-BLEACHED PULP .4. COMPARISON OF E, (EB),(EO), (EP) AND (EOP) TREATMENT
Autore:
LINDHOLM CA;
Indirizzi:
HELSINKI UNIV TECHNOL,PULPING TECHNOL LAB SF-02150 ESPOO FINLAND
Titolo Testata:
Journal of pulp and paper science
fascicolo: 3, volume: 19, anno: 1993,
pagine: 108 - 113
SICI:
0826-6220(1993)19:3<108:AEOOP.>2.0.ZU;2-E
Fonte:
ISI
Lingua:
ENG
Keywords:
ALKALI EXTRACTION; BLEACHED PULPS; OZONATION; SODIUM BOROHYDRIDE; OXYGEN; HYDROGEN PEROXIDE; KAPPA-NUMBER; SEQUENCES; BRIGHTNESS; VISCOSITY; SELECTIVITY;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
12
Recensione:
Indirizzi per estratti:
Citazione:
C.A. Lindholm, "ALKALINE EXTRACTION OF OZONE-BLEACHED PULP .4. COMPARISON OF E, (EB),(EO), (EP) AND (EOP) TREATMENT", Journal of pulp and paper science, 19(3), 1993, pp. 108-113

Abstract

The effect of various additives in alkaline extraction of ozone-bleached kraft pulp was investigated. Sodium borohydride reduced the viscosity drop in extraction, but did not totally prevent it. (EB) extraction did not significantly change the kappa number reduction compared with normal E treatment. Oxygen and/or hydrogen peroxide clearly enhancedlignin removal in extraction compared with a normal E treatment. (EO)extraction increased the kappa number reduction by 30-55%, (EP) extraction by 40-70% and (EOP) extraction by 50-95%. (EP) and (EOP) extraction decreased the viscosity somewhat compared with normal E extraction. Conversely, (EO) extraction did not decrease viscosity more than normal E extraction and may even slightly improve the selectivity (viscosity vs. kappa number).

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 29/11/20 alle ore 18:36:45