Abstract
Brightness stability of both mechanical and chemical pulps is
considered, and possible means to control discoloration reactions are
addressed. As a new approach to retard the yellowing tendency of mechanical
pulps, an enzymatically assisted bonding of inert compounds to the reactive
sites of mechanical pulp is introduced. Promising results have been obtained
by treatment of bleached mechanical pulps with laccase and linoleic acid. The
brightness stability of chemical pulp, on the other hand, is largely
determined during pulp processing, and especially bleaching. The efficient
removal of hexenuronic acids (HexA) and residual lignin, as well as the role
of final bleaching stage in ECF sequence in respect of pulp carbonyl groups
are very important.
Original language | English |
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Title of host publication | PulPaper 2007 Conference |
Subtitle of host publication | Innovative and Sustainable Use of Forest Resources |
Number of pages | 8 |
Publication status | Published - 2007 |
MoE publication type | B3 Non-refereed article in conference proceedings |
Event | PulPaper 2007 Conference Innovative and Sustainable Use of Forest Resources - Helsinki, Finland Duration: 5 Jun 2007 → 7 Jun 2007 |
Conference
Conference | PulPaper 2007 Conference Innovative and Sustainable Use of Forest Resources |
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Country/Territory | Finland |
City | Helsinki |
Period | 5/06/07 → 7/06/07 |