dc.contributor.author |
Potůček, František
|
cze |
dc.contributor.author |
Říhová, Martina
|
cze |
dc.date.accessioned |
2019-05-22T08:08:00Z |
|
dc.date.available |
2019-05-22T08:08:00Z |
|
dc.date.issued |
2017 |
eng |
dc.identifier.issn |
0576-9787 |
eng |
dc.identifier.uri |
https://hdl.handle.net/10195/72531 |
|
dc.description.abstract |
Soda rapeseed pulps delignified to kappa numbers of 21.4 and 16.4 underwent elemental chlorine-free bleaching using chlorine dioxide, hydrogen peroxide, and peracetic acid as bleaching agents under laboratory conditions. Three four-stage bleaching sequences, DE(P)PPaa, D0EPD1P and D0EPD1D2, were applied to investigate the properties of bleached soda pulps, namely their brightness, zero-span breaking length and degree of polymerisation. For comparison, an oxygen-predelignified kraft softwood pulp with an initial kappa number of 10.5 was bleached under the same conditions. Soda pulps subjected to bleaching processes comprising two or three D stages were found to have a final brightness of 83.1 to 83.8% ISO, which was lower than that of 87.6 to 87.9% ISO obtained for kraft softwood pulp. The decrease in fibre strength was of only 7-9% for soda pulps, slightly greater than that of kraft softwood pulp. In contrast to fibre strength, the loss in the degree of polymerisation was considerable, roughly of 35% for soda pulps and 40 to 47% for kraft softwood pulp, depending on the bleaching sequence. |
eng |
dc.format |
p. 871-877 |
eng |
dc.language.iso |
eng |
eng |
dc.relation.ispartof |
Cellulose Chemistry and Technology, volume 51, issue: 9-10 |
eng |
dc.rights |
Práce není přístupná |
eng |
dc.subject |
soda rapeseed pulp |
eng |
dc.subject |
elemental chlorine-free bleaching |
eng |
dc.subject |
brightness |
eng |
dc.subject |
zero-span breaking length |
eng |
dc.subject |
degree of polymerisation |
eng |
dc.subject |
nátronová várka |
cze |
dc.subject |
řepka |
cze |
dc.subject |
ECF bělení |
cze |
dc.subject |
bělost |
cze |
dc.subject |
tržná délka s nulovým upnutím |
cze |
dc.subject |
stupeň polymerace |
cze |
dc.title |
Elemental Chlorine-Free Bleaching of Soda Rapeseed Pulp |
eng |
dc.title.alternative |
ECF bělení nátronové buničiny z řepky |
cze |
dc.type |
article |
eng |
dc.description.abstract-translated |
Nátronová buničina z řepné slámy delignifikovaná na kappa čísla 21.4 a 16.4 byla ECF bělena s použitím chlordioxidu, peroxidu vodíku a peroctové kyseliny jako bělících činidel za laboratorních podmínek. |
cze |
dc.peerreviewed |
yes |
eng |
dc.publicationstatus |
postprint |
eng |
dc.relation.publisherversion |
http://www.cellulosechemtechnol.ro/pdf/CCT9-10(2017)/p.871-877.pdf |
eng |
dc.identifier.wos |
000425762900009 |
|
dc.identifier.obd |
39880688 |
eng |
dc.note |
http://apps.webofknowledge.com/InboundService.do?customersID=Alerting&mode=FullRecord&IsProductCode=Yes&product=WOS&Init=Yes&Func=Frame&DestFail=http%3A%2F%2Fwww.webofknowledge.com&action=retrieve&SrcApp=Alerting&SrcAuth=Alerting&SID=D3NXttvkMvt1m59NFnL&UT=WOS%3A000425762900009 |
eng |