Japan International Research Center for Agricultural Sciences | JIRCAS

Chlorine-Free Bleaching of Kraft Pulp from Oil Palm Empty Fruit Bunches

Japan Agricultural Research Quarterly
ISSN
00213551
NII recode ID (NCID)
AA0068709X
Full text

Chlorine-free bleaching was carried out on kraft pulp from oil palm empty fruit bunches (EFB) with an oxygen (O2) - acid (H2SO4) - ozone (O3) - hydrogen peroxide (H2O2) bleaching sequence. The κ-number (= an indicator of lignin content) of the pulp was reduced considerably after these processes indicating that most of the lignin present in the pulp can be removed using this chlorine-free sequence. Handsheets of both bleached and unbleached EFB pulp were prepared and their paper properties were determined. Brightness, a measure of the whiteness of paper, was achieved to ca. 75% for the bleached EFB pulp, showing a possibility of achieving 80% of brightness by chlorine-free bleaching. Paper strengths as indicated by tensile, tear and burst indices as well as stretch did not show significant differences between before and after bleaching. It is notable that these results were obtained despite a large decrease in viscosity by the bleaching process. Moreover, the EFB bleached pulp showed comparable strengths to hardwood pulps, indicating that EFB has the potential as a raw material for chemical pulp production using chlorine-free bleaching sequences.

Date of issued2004-10-01
CreatorTANAKA RyoheiWAN ROSLI W. D.MAGARA KengoIKEDA TsutomuHOSOYA Shuji
Subject

EFB

oxygen

ozone

brightness

paper strengths

PublisherJapan International Research Center for Agricultural Sciences
Dates2004-10-01
NII resource type vocabularyJournal Article
Volume38
Issue4
spage275
epage279
DOI10.6090/jarq.38.275
RightsJapan International Research Center for Agricultural Sciences
Languageeng