Method for separating the main components of lignocellulosic materials
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United States of America Patent
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Feb 17, 2015
Grant Date -
Mar 5, 2009
app pub date -
Apr 18, 2006
filing date -
Apr 18, 2005
priority date (Note) -
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Abstract
The objective of this invention is a method for separating cellulosic fibres, hemicellulose and lignin from parts of plants containing these, such as stems, leaves and seed coats or hulls of cereal, oilseed, fibre or grassy plants. After appropriate pre-treatments the material is heated in an alkaline solution at lower temperatures than used in the traditional cellulose manufacturing. After this heat treatment, the fibrous and other undissolved materials are separated from the solution and subsequently ground in wet condition, using preferably chafing treatments. For improving the separation, surface active substances can be included in the alkaline heat treatment solution.
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