Search: onr:"swepub:oai:DiVA.org:kth-80520" >
Bleaching of softwo...
Bleaching of softwood kraft pulps with H2O2, O3, and ClO2
- Article/chapterEnglish1996
Publisher, publication year, extent ...
Numbers
-
LIBRIS-ID:oai:DiVA.org:kth-80520
-
https://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-80520URI
Supplementary language notes
-
Language:English
-
Summary in:English
Part of subdatabase
Classification
-
Subject category:ref swepub-contenttype
-
Subject category:art swepub-publicationtype
Notes
-
NR 20140805
-
Ozone or chlorine dioxide bleaching prior to hydrogen peroxide bleaching greatly improves the performance of the hydrogen peroxide stage. The efficiency is further improved by a chelating treatment immediately after the ozone or chlorine dioxide stage. With an optimal metal ion profile, laboratory bleached (OAZQP) softwood kraft pulps can reach brightness levels above 90% ISO, with 5-10% lower pulp strength properties and bleaching costs comparable to ECF bleaching. It also is possible to obtain full brightness with only hydrogen peroxide provided the metal ion profile is optimal, e.g., by using multiple QP treatments. The chemical consumptions, expressed as oxidation equivalents per decreased kappa number are the same as for sequences including ozone or chlorine dioxide. Ozone and chlorine dioxide are comparable as far as delignification and brightness efficiency go.
Subject headings and genre
Added entries (persons, corporate bodies, meetings, titles ...)
-
Bergnor, Elisabeth
(author)
-
Ek, MonicaKTH,Träkemi och massateknologi
(author)
-
Ekholm, Ulrika
(author)
-
KTHTräkemi och massateknologi
(creator_code:org_t)
Related titles
-
In:TAPPI Journal79:1, s. 113-1190734-1415
Internet link
Find in a library
To the university's database