Process for controlling the supply of delignifying and/or...

Details Process for controlling the supply of delignifying and/or... Process for controlling the supply of delignifying and/or...

C - Chemistry, Metallurgy

21

C

9/2

C21C 3/00 (2006.01) D21C 9/10 (2006.01)

Patent

CA 1099058

ABSTRACT OF THE DISCLOSURE A method is provided for controlling the supply of delignifying and/or bleaching chemicals in the continuous delignification and/or bleaching of lignocellulosic material such as wood and pulp in a through flow delignification and/or bleaching stage which comprises admixing the lignocellulosic material with delignifying and/or bleaching chemicals and flowing the lignocellulosic material under delignifying and/or bleaching conditions through the stage while controlling the addition of the delignify- ing and/or bleaching chemicals according to the ratio of the quantity of delignifying and/or bleaching chemicals consumed to the quantity of delignifying and/or bleaching chemicals originally charged referred to hereinafter as relative consumption the time and the temperature in a manner to maintain substantially constant the relative consumption of delignifying and/or bleaching chemicals at a predetermined time by the lignocellulosic material during flow through the stage.

303102

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