Process for producing bleached pulp

Details Process for producing bleached pulp Process for producing bleached pulp

D - Textiles, Paper

21

C

D21C 9/10 (2006.01) D21C 3/04 (2006.01)

Patent

CA 2230961

A bleached pulp is produced by a process in which an unbleached pulp prepared from a wood material is treated in an aqueous acid solution under a pressure generated by an oxygen and/or nitrogen containing gas, and the acid-treated pulp is subjected to a single or multi-stage bleaching procedure.

Une pâte blanchie est obtenue grâce à un procédé selon lequel une pâte écrue, préparée à partir de bois, est traitée dans une solution acide aqueuse sous une pression produite par un gaz contenant de l'oxygène ou de l'azote. La pâte traitée à l'acide est soumise à un processus de blanchiment en un seul stade ou à plusieurs stades.

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