Method for the production of cellulose by the batch cooking...

Details Method for the production of cellulose by the batch cooking... Method for the production of cellulose by the batch cooking...

D - Textiles, Paper

21

C

9/2

D21C 3/26 (2006.01) D21C 1/00 (2006.01)

Patent

CA 1230207

Abstract The invention relates to a method for the production of cellulose by the batch cooking process, wherein the digester is filled with chips and cooking liquor, and the batch is cooked at elevated temperature and pressure in order to obtain a delignified cellulose pulp in the digester. For the impregnation stage a cooking liquor is used which contains a substantially higher amount of active chemicals than is required for the cooking of the batch, and before the actual delignification stage the active-chemical batch for the cooking is adjusted and the excess amount of active chemicals is removed by replacing it by part of the hot spent cooking liquor recovered from a previous cooking.

468919

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