Displacement washing of pulp with urea solutions

Potůček, F. and Pulcer, M. Displacement washing of pulp with urea solutions Chemical Papers, Vol.60, No. 5, 2006, 365-370

Document type: Článok z časopisu / Journal Article
Collection: Chemical papers  

Author(s) Potůček, F.
Pulcer, M.
Title Displacement washing of pulp with urea solutions
Journal name Chemical Papers
Publication date 2006
Year available 2006
Volume number 60
Issue number 5
ISSN 0366-6352
Start page 365
End page 370
Place of publication Poland
Publisher Versita
Collection year 2006
Language english
Subject 250000 Chemical Sciences
250500 Macromolecular Chemistry
Abstract/Summary Two basic mechanisms of displacement washing of pulp fibres were investigated. Experiments were carried out in a laboratory washing cell that simulated a single stage of displacement washing. The step-change method has been employed in investigation of alkali lignin profile in outlet stream of washing effluents. The addition of urea to wash water resulted in a decrease of the liquid layer immobilized on the fibre surface. It had a positive effect on the washing efficiency expressed in terms of the void local efficiency.
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