Method for controlling oxygen delignification of pulp

D - Textiles – Paper – 21 – C

Patent

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

D21C 9/147 (2006.01) D21C 9/10 (2006.01)

Patent

CA 2270598

A method of controlling oxygen delignification of pulp, i.e. reduction of the kappa number of the pulp, where the delignification is carried out in two stages, and the main portion of the chemicals required for the delignification is added to the first stage. The ingoing kappa number of the pulp prior to the delignification and the reduction of the kappa number of the pulp during the total delignification in the two stages are used for adjusting the chemical addition to the first stage. The control is carried out so that higher ingoing kappa number yields lower charge and higher kappa number reduction yields higher charge, calculated per reduced kappa number unit. Said chemical addition to the first stage in its tum is used for control the temperature in the second stage.

L'invention concerne un procédé de gestion de la délignification à l'oxygène de pâte, c'est-à-dire la réduction de l'indice kappa de la pâte, dans lequel on procède à la délignification en deux phases, la partie principale des agents chimiques nécessaires de la délignification étant ajoutée pendant la première phase. L'indice kappa d'entrée de la pâte avant la délignification et la réduction de l'indice kappa de la pâte pendant la délignification totale dans les deux phases sont utilisés pour ajuster l'addition d'agent chimique dans la première phase. La gestion s'effectue de manière qu'un indice kappa d'entrée élevé produit une faible charge et une plus grande réduction de l'indice kappa produit une plus grande charge, calculée par unité d'indice kappa réduit. Ladite addition d'agent chimique dans la première phase est à son tour utilisée pour gérer la température dans la seconde phase.

LandOfFree

Say what you really think

Search LandOfFree.com for Canadian inventors and patents. Rate them and share your experience with other people.

Rating

Method for controlling oxygen delignification of 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 Method for controlling oxygen delignification of pulp, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method for controlling oxygen delignification of pulp will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFCA-PAI-O-1356769

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.