Pulp production

Details Pulp production Pulp production

D - Textiles, Paper

21

C

D21C 1/04 (2006.01)

Patent

CA 2166618

A method of manufacturing chemical pulp out of comminuted cellulosic fibre material comprising digesting the fibre material with digestion liquid without preceding peroxide stage. According to the invention the comminuted fibre material is treated in at least one stage prior to said digestion, in the presence of a liquid containing at least one compound having the ability to form complexes with metals existing naturally in the fibre material.

Procédé de production de pâte chimique à partir de matériau fibreux cellulosique pulvérisé, qui consiste à mettre en digestion le matériaux fibreux à l'aide d'un liquide de digestion sans passer par la phase préalable du peroxyde. Selon la présente invention, le matériaux fibreux pulvérisé subit une phase de traitement au moins avant la digestion, en présence d'un liquide contenant au moins un composé qui a la capacité de former des complexes avec des métaux naturellement présents dans le matériau fibreux.

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