Soda Pulp Cooked From Rapeseed Straw

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216275%3A25310%2F16%3A39901675" target="_blank" >RIV/00216275:25310/16:39901675 - isvavai.cz</a>

Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Soda Pulp Cooked From Rapeseed Straw

Popis výsledku v původním jazyce

The paper deals with batch soda cooking of pulp from rapeseed straw. The preliminary runs were focused on determination of active alkali charge and liquor-to-straw ratio upon the delignification degree of pulp. For suitable cooking parameters, viz. active alkali charge of 19 %, liquor-to-straw ratio of 5:1, and anthraquinone charge of 0.1 %, the effect of the delignification degree directly proportional to the H-factor upon the total yield, kappa number, and amount of rejects was investigated in the H-factor interval from 800 to 2,800 h. For soda-AQ cooks of straw, stalks, and silique valves, the total pulp yield, kappa number, as well as amount of rejects decreased with increasing H-factor. The greatest total yield and degree of delignification were found for soda-AQ pulp cooked from stalks only. On the contrary, the silique valves gave the lowest total yield. The degree of polymerisation of pulp cooked from straw, stalks, and silique valves increased with increasing H-factor, the greatest values were measured for pulp from stalks. The colour properties of pulp from straw and stalks including brightness found in the interval of 30 to 34 did not differ significantly each other. However, the tensile strength of handsheets made of pulp once dried and repulped was found to be markedly lower in comparison with never dried pulp.

Název v anglickém jazyce

Soda Pulp Cooked From Rapeseed Straw

Popis výsledku anglicky

The paper deals with batch soda cooking of pulp from rapeseed straw. The preliminary runs were focused on determination of active alkali charge and liquor-to-straw ratio upon the delignification degree of pulp. For suitable cooking parameters, viz. active alkali charge of 19 %, liquor-to-straw ratio of 5:1, and anthraquinone charge of 0.1 %, the effect of the delignification degree directly proportional to the H-factor upon the total yield, kappa number, and amount of rejects was investigated in the H-factor interval from 800 to 2,800 h. For soda-AQ cooks of straw, stalks, and silique valves, the total pulp yield, kappa number, as well as amount of rejects decreased with increasing H-factor. The greatest total yield and degree of delignification were found for soda-AQ pulp cooked from stalks only. On the contrary, the silique valves gave the lowest total yield. The degree of polymerisation of pulp cooked from straw, stalks, and silique valves increased with increasing H-factor, the greatest values were measured for pulp from stalks. The colour properties of pulp from straw and stalks including brightness found in the interval of 30 to 34 did not differ significantly each other. However, the tensile strength of handsheets made of pulp once dried and repulped was found to be markedly lower in comparison with never dried pulp.

Druh

J_x - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)

CEP obor

JJ - Ostatní materiály

OECD FORD obor

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Projekt

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Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2016

Kód důvěrnosti údajů

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

Název periodika

Cellulose Chemistry and Technology

ISSN

0576-9787

e-ISSN

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Svazek periodika

50

Číslo periodika v rámci svazku

5-6

Stát vydavatele periodika

RO - Rumunsko

Počet stran výsledku

8

Strana od-do

681-688

Kód UT WoS článku

000386993700021

EID výsledku v databázi Scopus

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