D - Textiles – Paper – 21 – C
Patent
D - Textiles, Paper
21
C
9/17, 9/36.3
D21C 11/00 (2006.01) D21C 11/04 (2006.01)
Patent
CA 1076306
ABSTRACT OF THE DISCLOSURE A process is provided for reducing the requirement of fresh chemicals without increasing emissions in the pulping of cellulosic material with alkaline sodium and sulfur-containing-sulfate pulping liquor, which comprises evaporating and burning spent sulfate pulping liquor; dissolving the resulting smelt in water to form a sodium- sulfide-sodium carbonate-containing solution (green liquor); regenera- ting pulping liquor (white liquor) containing sodium sulfide and sodium hydroxide from said solution; and recirculating said regenerated liquor to the pulping stage; oxidizing at least one of the resulting green and white liquors to form sodium thiosulfate therein; reacting the residual acid liquor from the manufacture of chlorine dioxide by reduction of an alkali metal with oxidized white and/or green liquor to form sulfur dioxide and sulfur; removing and recovering sulfur dioxide; and returning the residual liquor freed from sulfur dioxide to the pulping.
255107
Noreus Sture E. O.
Uhlin Lars T.
LandOfFree
Process for reducing the requirement of fresh chemicals... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Process for reducing the requirement of fresh chemicals..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Process for reducing the requirement of fresh chemicals... will most certainly appreciate the feedback.
Profile ID: LFCA-PAI-O-1033592