Process for deslignificau00c7u00e7o a pulp in an aqueous suspensu00e7o lignocelulu00e0sica

摘要

Process for deslignificau00c7u00e7o a pulp in an aqueous suspensu00e7o lignocelulu00e0sica. The final bleaching of lignocellulosic materials with chlorine dioxide is more effective at a pH close to neutral, but the industrial practice this typically shoots a final pH between 3.5 and 4.0 in decorru00e9ncia the difficulty of achieving and maintaining the pH close to neutral at low cost.The formation of bicarbonate in situ before the addition of chlorine dioxide provides a way to maintain the pH close to neutral required. The final bleaching with chlorine dioxide nearly neutral also produces a bleached pulp which is in a state that respond more effectively to the fluorescent whitening agents or optical polishing.