Pulp treatment and process

D - Textiles – Paper – 21 – C

Patent

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Details

D21C 9/00 (2006.01)

Patent

CA 2441055

This invention provides a process for treating chemical woodpulp, or chemical cellulose including cotton linter, including the step of applying an electron processing technology (EPT) step to chemical woodpulp, or chemical cellulose, as the case may be, on an in-line basis to provide control of pulp viscosity or degree of polymerisation (DP). The invention also provides a method of process control in treating the aforementioned woodpulp or cellulose, including the step of using radiation dose-viscosity relationship curve for applying an EPT step on an in-line basis. The in-line EPT step may, in one form of the invention, replace and hence eliminate a chemical DP reduction step.

L'invention concerne un procédé pour traiter de la pâte de bois chimique ou de la cellulose chimique contenant de la fibre de coton. Ce procédé consiste à appliquer une technique de traitement électronique (EPT) à la pâte de bois chimique ou à la cellulose chimique, selon le cas, selon un mode en ligne, pour pouvoir contrôler la viscosité de la pâte ou son degré de polymérisation (DP). La présente invention porte également sur un procédé pour contrôler le traitement de la pâte de bois ou de la cellulose susmentionnées, selon lequel une courbe de rapport dose d'irradiation viscosité est utilisée pour appliquer l'EPT selon un mode en ligne. Dans un mode de réalisation, l'EPT en ligne peut remplacer ou supprimer une opération de réduction chimique du degré de polymérisation.

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