Chemistry: electrical and wave energy – Processes and products
Patent
1975-11-18
1976-10-19
Hart, Charles N.
Chemistry: electrical and wave energy
Processes and products
210 42R, 210 45, 210 22R, 162 29, 162DIG8, 204149, 204152, 423473, 423499, 423641, 204 98, 204128, D21C 1110, B01D 1302
Patent
active
039869512
ABSTRACT:
The method of treating a chlorine-based total bleachery effluent in which only a chlorine and sodium salts are used in the bleach sequence comprising the steps of adding aluminum ion to said effluent in an amount sufficient to precipitate substantially all of the organics and suspended solids therein, separating the solids from said effluent, electrodialyzing the treated effluent to provide two effluent streams, one containing 200 to 600 parts per million sodium chloride which can be returned to the bleachery, and a second concentrated stream containing 5 to 10% by weight sodium chloride, evaporating said concentrated stream to a concentration of about 25% sodium chloride by weight, and electrolyzing said concentrated sodium chloride solution to produce chlorine gas, sodium hydroxide, and sodium hypochlorite.
REFERENCES:
patent: 2201812 (1940-05-01), Daniel
patent: 2784158 (1957-03-01), Bodamer
patent: 3268441 (1966-08-01), Lindstrom
patent: 3442778 (1969-05-01), Westerlund
patent: 3485729 (1969-12-01), Hertz
patent: 3627479 (1971-12-01), Yee
patent: 3627679 (1971-12-01), Fuller
patent: 3691041 (1972-09-01), Stralser
patent: 3694307 (1972-09-01), Iwahashi
patent: 3793174 (1974-02-01), Ichiki
patent: 3935092 (1976-01-01), Bizot
"Electrolytic Coagulation of Ligrin from Kraft Mill Bleach Plant Wastewaters," Herer & Woodard & Tappi, vol. 59, No. 1, Jan. 1976, pp. 134-136.
"The World's First Closed-cycle Bleached Kraftmill is now Being Built," Tapp, vol. 59, No. 2, Feb. 1976, p. 26.
Champion International Corporation
Hart Charles N.
Sommer Evelyn M.
Therkorn Ernest G.
LandOfFree
Chlorine-based bleachery effluent treatment does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Chlorine-based bleachery effluent treatment, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Chlorine-based bleachery effluent treatment will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-100636