Process for delignifying lignocellulosic pulp by means of...

Details Process for delignifying lignocellulosic pulp by means of... Process for delignifying lignocellulosic pulp by means of...

D - Textiles, Paper

21

C

D21C 3/02 (2006.01)

Patent

CA 2071185

- 22 - IMPROVEMENT IN A PROCESS FOR DELIGNIFYING LIGNOCELLULOSIC PULP BY MEANS OF OXYGEN ABSTRACT The present invention refers to an improvement for delignifying a lignocellulosic pulp by means of oxygen wherein ethanol is used as an additive and the process is carried out at high temperature thereby obtaining a higher reduction of ligin content of the lignocellulosic pulp, that is, a higher reduction of the Kappa Number in comparison with conventional processes without, however, prejudicing the pulp quality. The use of the present invention provides a pulp which, when subjected to subsequent bleaching sequences, will require a lower amount of chloro compounds in order to achieve the desired whiteness and will also exhibit a high viscosity thus rendering a product with good resistance properties. D-16935

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