Bleaching of Soda Rapeseed Pulp with Chelation and Acid Stages

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

Bleaching of Soda Rapeseed Pulp with Chelation and Acid Stages

Popis výsledku v původním jazyce

Soda pulp cooked from rapeseed straw was subjected to the totally chlorine-free bleaching using hydrogen peroxide and peractic acid as bleaching agents. The five-stage bleaching sequence, Q1Q2EpPaaP, containing two chelation stages, as well as four-stage sequence, AEpPaaP, with an acidic stage were applied to investigate the properties of bleached soda pulp, namely its brightness and tensile strength. For comparison, once-dried kraft softwood pulp, as well as never-dried oxygen-predelignified kraft softwood pulp and sulphite spruce pulp were bleached under the same process conditions. The results obtained showed that totally chlorine-free bleaching did not bring the sufficient bleaching effect for soda rapeseed pulp. The brightness of 54 % ISO achieved for the AEpPaaP bleaching sequence was lower comparing to that for kraft and sulphite pulps.

Název v anglickém jazyce

Bleaching of Soda Rapeseed Pulp with Chelation and Acid Stages

Popis výsledku anglicky

Soda pulp cooked from rapeseed straw was subjected to the totally chlorine-free bleaching using hydrogen peroxide and peractic acid as bleaching agents. The five-stage bleaching sequence, Q1Q2EpPaaP, containing two chelation stages, as well as four-stage sequence, AEpPaaP, with an acidic stage were applied to investigate the properties of bleached soda pulp, namely its brightness and tensile strength. For comparison, once-dried kraft softwood pulp, as well as never-dried oxygen-predelignified kraft softwood pulp and sulphite spruce pulp were bleached under the same process conditions. The results obtained showed that totally chlorine-free bleaching did not bring the sufficient bleaching effect for soda rapeseed pulp. The brightness of 54 % ISO achieved for the AEpPaaP bleaching sequence was lower comparing to that for kraft and sulphite pulps.

Druh

D - Stať ve sborníku

CEP obor

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OECD FORD obor

20502 - Paper and wood

Projekt

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Návaznosti

S - Specificky vyzkum na vysokych skolach

Rok uplatnění

2018

Kód důvěrnosti údajů

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

Název statě ve sborníku

ŠVOČ 59 : 59th International Student´s Scientific Conference

ISBN

978-80-228-3058-4

ISSN

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e-ISSN

neuvedeno

Počet stran výsledku

12

Strana od-do

84-95

Název nakladatele

Technická univerzita vo Zvolene

Místo vydání

Zvolen

Místo konání akce

Zvolen

Datum konání akce

10. 5. 2018

Typ akce podle státní příslušnosti

EUR - Evropská akce

Kód UT WoS článku

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