LIGNINAVLAEGSNING UR LIGNOCELLULOSA INNEHAOLLANDE FIBER.

摘要

Reduction in required amounts of chlorine and optionally chlorine dioxide in the chlorination stage (C or CD) of a multi stage process for delignification 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.