Elemental Chlorine-Free Bleaching of Soda Pulp Cooked from Rapeseed Straw

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 Pulp Cooked from Rapeseed Straw

Popis výsledku v původním jazyce

Soda pulp cooked from rapeseed straw 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 D0EPD1P. 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 for both pulps. The brightness attained for elemental chlorine-free bleaching of soda and kraft pulps was compared with that obtained for totally chlorine-free bleaching of kraft softwood pulp in our previous work.

Název v anglickém jazyce

Elemental Chlorine-Free Bleaching of Soda Pulp Cooked from Rapeseed Straw

Popis výsledku anglicky

Soda pulp cooked from rapeseed straw 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 D0EPD1P. 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 for both pulps. The brightness attained for elemental chlorine-free bleaching of soda and kraft pulps was compared with that obtained for totally chlorine-free bleaching of kraft softwood pulp in our previous work.

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

ŠVOČ 57 : 57th International Student's Scientific Conference

ISBN

978-80-228-2858-1

ISSN

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e-ISSN

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Počet stran výsledku

11

Strana od-do

26-36

Název nakladatele

Technická univerzita vo Zvolene

Místo vydání

Zvolen

Místo konání akce

Zvolen

Datum konání akce

3. 5. 2016

Typ akce podle státní příslušnosti

EUR - Evropská akce

Kód UT WoS článku

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