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  European Commission   > Research > Key Action 5
 
index by sub-area 5.3.2. Strategies for the sustainable and multipurpose utilisation of forest resources; the forestry-wood chain
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Towards efficient oxygen delignification

Contract nr: QLK5-CT-1999-01277
Project type: RS (Research and Technological Development Project)
Starting date: 21-01-2000
Duration: 36 months
Total cost: 2,280,700 EUR
EC Contribution: 1,625,966 EUR
Scientific Officer: Ignacio SEOANE
Research topic: 5.3.2. Strategies for the sustainable and multipurpose utilisation of forest resources; the forestry-wood chain

Abstract:
The overall aim of the project is to improve the oxygen delignification process for the manufacture of chemical pulps. The first specific goal is to find and test active chemical or biochemical agents to enhance the cleavage of the networking non-phenolic ether linkage in lignin. The second is to activate kraft pulps before oxygen delignification with these selected agents in order to improve the selectivity of the oxygen delignification process. An evaluation of the pulp properties will be made for this improved modified oxygen delign. process and estimations of the costs will be calculated.

Objectives:
Delignification with oxygen in alkaline solution is a very useful method for the removal of lignin from pulp, and accordingly most of the pulp and paper mills in Europe use oxygen delignification to produce pulps for bleaching. However, both the efficiency and selectivity of oxygen delignification need to be improved in order to make full use of its potential since only half of the lignin can be dissolved. This is mainly due to the fact that non-phenolic b-aryl ether structures, the network building structure in lignin, are virtually non-reactive under oxygen-alkali conditions. Thus, in order to reach a greater extent of lignin degradation it is important to find conditions under which degradation of all the different structural features in lignin can be achieved. Significant improvements might be reached by “advanced oxidation technologies” (AOT).


Coordinator
Sten LJUNGGREN
Stiftelsen STFI Skogsindustrins Tekniska Forskning
Stockholm
SWEDEN
Tel.: +46 8 6767125
Fax: +46 8 4115518
E-mail: sten.ljunggren@stfi.se


Partners
  Torbjorn REITBERGER
Kungliga Tekniska Högskolan
Stockholm
SWEDEN
Tel.: +46 87908097
Fax: +46 8790 8772
E-mail: torbreit@nuchem.kth.se
  Steen STEENKEN
Max-Planck-Institut für Strahlenchemie
Muelheim an der Ruhr
GERMANY
Tel.: +49 208 3063535
Fax: +49 208 3063952
E-mail: steenken@mpi-muelheim.mpg.de
  Enrico BACIOCCHI
Università degli Studi di Roma "La Sapienza"
Roma
ITALY
Tel.: +39 064957808
Fax: +39 06490421
E-mail: baciocchi@axcasp.caspur.it
  Arne NORDGREN
WIBAX AB
Pitea
SWEDEN
Tel.: +46 418 29939
Fax: +46 418 29939
E-mail: arne@bredband.net
  Krister SJOBLOM
AGA Aktiebolag
Lidingoe
SWEDEN
Tel.: +46 87311252
Fax: +46 87317885
E-mail: krister.sjoblom@aga.se
  Jan-Erik LEVLIN
Oy Keskuslaboratorio-Centrallaboratorium Ab
Espoo
FINLAND
Tel.: +358 943711
Fax: +358 9464305
E-mail: tarja.tamminen@kcl.fi
  Massimo BIETTI
Università degli Studi di Roma "Tor Vergata"
Roma
ITALY
Tel.: +39 0672594384/54
Fax: +39 0672594328
E-mail: bietti@uniroma2.it