Elemental Chlorine-Free Bleaching of Soda Rapeseed Pulp

Kód výsledku v IS VaVaI

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Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Elemental Chlorine-Free Bleaching of Soda Rapeseed Pulp

Popis výsledku v původním jazyce

Soda pulp cooked from rapeseed straw (Brassica napus L. convar. napus, in our case winter line genotype Labrador) was subjected to a four-stage elemental chlorine-free bleaching under laboratory conditions. Chlorine dioxide and hydrogen peroxide were used as bleaching chemicals. For comparison, kraft pulp cooked from a blend of spruce and pine was subjected to the same bleaching sequence D0 EP D1 P. The initial kappa number of both pulps was 18.8. After each bleaching step, the optical and strength properties were measured. The preliminary results showed that bleachability of soda rapeseed pulp was lower in comparison with kraft softwood pulp for D0EPD1P bleaching sequence. The brightness increment of 43.2 % ISO and 48.5 % ISO was achieved for soda and kraft pulps, respectively. However, the bleaching had a negative impact on the zero-span breaking length which decreased from 3.9 km for unbleached soda pulp to 3.6 km for bleached soda pulp.

Název v anglickém jazyce

Elemental Chlorine-Free Bleaching of Soda Rapeseed Pulp

Popis výsledku anglicky

Soda pulp cooked from rapeseed straw (Brassica napus L. convar. napus, in our case winter line genotype Labrador) was subjected to a four-stage elemental chlorine-free bleaching under laboratory conditions. Chlorine dioxide and hydrogen peroxide were used as bleaching chemicals. For comparison, kraft pulp cooked from a blend of spruce and pine was subjected to the same bleaching sequence D0 EP D1 P. The initial kappa number of both pulps was 18.8. After each bleaching step, the optical and strength properties were measured. The preliminary results showed that bleachability of soda rapeseed pulp was lower in comparison with kraft softwood pulp for D0EPD1P bleaching sequence. The brightness increment of 43.2 % ISO and 48.5 % ISO was achieved for soda and kraft pulps, respectively. However, the bleaching had a negative impact on the zero-span breaking length which decreased from 3.9 km for unbleached soda pulp to 3.6 km for bleached soda pulp.

Druh

D - Stať ve sborníku

CEP obor

JJ - Ostatní materiály

OECD FORD obor

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Projekt

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Návaznosti

S - Specificky vyzkum na vysokych skolach

Rok uplatnění

2016

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název statě ve sborníku

Proceedings of the 4th International Conference on Chemical Technology

ISBN

978-80-86238-94-4

ISSN

2336-811X

e-ISSN

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Počet stran výsledku

6

Strana od-do

354-359

Název nakladatele

Česká společnost průmyslové chemie

Místo vydání

Praha

Místo konání akce

Mikulov

Datum konání akce

25. 4. 2016

Typ akce podle státní příslušnosti

EUR - Evropská akce

Kód UT WoS článku

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