Lignofibre (LGF) organosolv process for producing dissolving pulps

Heli Kangas, Kristiina Poppius-Levlin, Tarja Tamminen, Tiina Liitiä

Research output: Contribution to conferenceConference articleScientificpeer-review

Abstract

The potential of different organosolv processes, based on the utilization of acetic acid as the cooking solvent, to produce high-quality pulps meeting the requirements for dissolving pulps was evaluated. The Lignofibre (LGF) and Formacell processes produced pulps with acceptable delignification degree at short cooking times. Both of these pulps were readily bleachable to high brightness with short ECF and TCF bleaching sequences. The pulps met most of the general requirements for dissolving pulps, i.e. high cellulose and low lignin, hemicellulose, ash and metal contents as well as adequate viscosity and R18. The reactivity of cellulose, as determined by the Fock method, was very high. The LGF pulp was shown to be a potential raw material for regenerated cellulose applications, where high viscosities together with high reactivity of cellulose are required, and where the hemicellulose content is not critical, such as the cellulose ether grades.
Original languageEnglish
Publication statusPublished - 2013
Event17th International Symposium on Wood, Fibre and Pulping Chemistry, ISWEFPC 2013, 12 - 14 June 2013, Vancouver, Canada -
Duration: 1 Jan 2013 → …

Conference

Conference17th International Symposium on Wood, Fibre and Pulping Chemistry, ISWEFPC 2013, 12 - 14 June 2013, Vancouver, Canada
Period1/01/13 → …

Keywords

  • organosolv
  • dissolving pulp
  • acetic acid

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