A method of preparing bleached pulp with high yield by free...

Details A method of preparing bleached pulp with high yield by free... A method of preparing bleached pulp with high yield by free...

D - Textiles, Paper

21

C

D21C 9/10 (2006.01)

Patent

CA 2654698

A method of preparing bleached pulp with high yield by free radical cleanness kraft process, which includes providing electrons to the reactive medium in the electrochemical vessel by electrodes as the pH is subacidity. And put oxygen and/or nitrogen into the reactive vessel, and at the same time add chelating agent, cellulose protectant and free radical stabilizer to the reactive vessel. So as to field a great variety of free radical and to separate the lignin from it, thus bleached pulp is obtained.

La présente invention concerne un procédé de préparation de pâte blanchie avec un rendement élevé par un procédé kraft de nettoyage sans radicaux libres, qui comprend l'introduction d'électrons dans le milieu réactionnel dans le récipient électrochimique par l'intermédiaire d'électrodes lorsque le pH est d'une valeur acide et l'introduction d'oxygène et/ou d'azote dans le récipient des réactifs et l'addition conjointe d'un agent de chélation, d'un protecteur de cellulose et d'un stabilisateur de radicaux libres dans le récipient des réactifs. Après avoir touché une grande variété de radicaux libres et séparer la lignine, on a ainsi obtenu une pâte blanchie.

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