Delignification of lignocellulose-containing fiber

Details Delignification of lignocellulose-containing fiber Delignification of lignocellulose-containing fiber

D - Textiles, Paper

21

C

9/16.5

D21C 3/02 (2006.01) D21C 3/18 (2006.01) D21C 3/26 (2006.01) D21C 9/10 (2006.01) D21C 9/147 (2006.01) D21C 9/16 (2006.01)

Patent

CA 2023916

ABSTRACT Reduction in required amounts of chlorine and optionally chlorine dioxide in the chlorination stage (C or CD) of a multistage process for delignifi- cation and bleaching of lignocellulosic pulp is achieved by increasing the temperature and O2 normally employed in the oxygen alkali extraction stage (Eo) concurrently with the addition of hydrogen peroxide to the pulp just before or after introduction of the molecular oxygen used in the oxygen alkali extraction stage.

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