D - Textiles – Paper – 21 – C
Patent
D - Textiles, Paper
21
C
8/78.1, 9/16.5
D21C 3/00 (2006.01) D21C 3/22 (2006.01)
Patent
CA 1043515
ABSTRACT OF THE DISCLOSURE A method for batch pulp digestion with hydroxide-bearing cooking liquors in combination with continuous alkaline oxygen delignification is described. The brown stock washing plant and the connected oxygen stage are disengaged from oxygen- consuming substance by removing black liquor from a pre-cook with a surplus of hydroxide-consuming chips; besides black liquor in the brown stock washing plant is displaced with oxy spent liquor (bleaching spent liquor from the oxygen deligni- fication stage) and/or alkalization spent liquor (bleaching spent liquor worth recovering because of its sodium content) and a mixture if said liquors is used for charging liquor to digesters or to the digestion plant liquor system. The circulating cooking liquor content of hydroxide for lignin release is continuously regulated by means of white liquor dosage which is controlled according to the dilution which is caused by the supply of bleaching spent liquors whose hydroxide content reflects variations in digesting conditions and thereby caused Kappa number fluctuations.
214108
LandOfFree
Method for controlling batch alkaline pulp digestion in... 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 batch alkaline pulp digestion in..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method for controlling batch alkaline pulp digestion in... will most certainly appreciate the feedback.
Profile ID: LFCA-PAI-O-1138148