A method for manufacturing mechanical pulp

Details A method for manufacturing mechanical pulp A method for manufacturing mechanical pulp

D - Textiles, Paper

21

C

D21C 9/153 (2006.01) D21B 1/12 (2006.01) D21D 1/00 (2006.01)

Patent

CA 2633800

The present invention relates to a method for manufacturing mechanical pulp, the method comprising - introducing raw material of the mechanical pulp, - refining the raw material in a first refining stage in order to form the mechanical pulp, - adjusting the pH of the mechanical pulp between 9 and 11 in a process step in which a first process delay is arranged, the first process delay being at least 0.5 hours, - sorting the mechanical pulp into a first accepted stock (A1) and a first rejected stock (R1), - ozonizing the first rejected stock (R1) whose pH at the start of the ozonation process is between 9 and 11, - refining the ozonated first rejected stock (R1) in a second refining stage so that at least a part of it will belong to a second accepted stock, and - combining the accepted stocks. The present invention also relates to the use of the mechanical pulp.

La présente invention porte sur un procédé de fabrication d'une pulpe mécanique, le procédé comprenant les opérations consistant à -introduire une matière première de la pulpe mécanique, - affiner la matière première dans une première étape d'affinage afin de former la pulpe mécanique, - ajuster le pH de la pulpe mécanique entre 9 et 11 dans une étape de traitement dans laquelle un premier retard de traitement est agencé, le premier retard de traitement étant au moins de 0,5 heure, - trier la pulpe mécanique en un premier stock accepté (A1) et un premier stockage rejeté (R1), - traiter à l'ozone le premier stock rejeté (R1) dont le pH au début du traitement d'ozonisation est entre 9 et 11, - affiner le premier stock rejeté traité à l'ozone (R1) dans une seconde étape d'affinage, de telle sorte qu'au moins une partie de celui-ci appartiendra à un second stock accepté, et - combiner les stocks acceptés. La présente invention porte également sur l'utilisation de la pulpe mécanique.

Affiliated with

Also associated with

Rating

A method for manufacturing mechanical pulp does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with A method for manufacturing mechanical pulp, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and A method for manufacturing mechanical pulp will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFCA-PAI-O-1428226