Method of pulping

Details Method of pulping Method of pulping

D - Textiles, Paper

21

C

D21C 9/16 (2006.01) D21C 9/14 (2006.01)

Patent

CA 2189724

A method for the bleaching of pulp. The pulp is first bleached with chlorine dioxide. Further bleaching is then carried out at alkaline pH with hydrogen peroxide in the presence of a chelating agent. The resulting pulp has low organic halogen, enhanced brightness and good strength.

Méthode de blanchiment de la cellulose. La pâte est d'abord blanchie au dioxyde de chlore. On poursuit ensuite l'opération avec un peroxyde d'hydrogène au pH alcalin en présence d'un agent chélateur. La pâte résultante est faible en organochlorés; sa blancheur est supérieure et sa résistance est bonne.

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