Paper making and fiber liberation – Processes of chemical liberation – recovery or purification... – Continuous chemical treatment or continuous charging or...
Patent
1976-03-09
1977-08-02
Bashore, S. Leon
Paper making and fiber liberation
Processes of chemical liberation, recovery or purification...
Continuous chemical treatment or continuous charging or...
162 30R, 162 60, 162 89, 162 DIG.8, D21C 326, D21C 1104
Patent
active
040393720
ABSTRACT:
Acid and alkaline filtrates are separated from the bleach plant of a bleached pulp mill for use in washing unbleached pulp free from entrained pulping liquor. Acid effluent is neutralized with sodium hydroxide solution prior to use in the washing as the last washing step while alkaline filtrate is used in the remainder of the washing. Part of both the acid and alkaline filtrates are not used in the washing to allow bleed of calcium value and caustic extraction stage solids which otherwise would build up on the washed pulp mat passing to the bleach plant.
REFERENCES:
patent: 3183145 (1965-05-01), Collins
patent: 3269941 (1966-08-01), Compte et al.
patent: 3453174 (1969-07-01), Rapson
patent: 3698995 (1972-10-01), Rapson
patent: 3746612 (1973-07-01), Rapson et al.
patent: 3909344 (1975-09-01), Lukes
patent: 3945880 (1976-03-01), Lukes et al.
patent: 3950217 (1976-04-01), Reeve
Rapson W. Howard
Reeve Douglas W.
Rowlandson Gordon
Bashore S. Leon
Erco Envirotech Ltd.
Kratz Peter F.
LandOfFree
Bleach plant filtrate recovery does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Bleach plant filtrate recovery, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Bleach plant filtrate recovery will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2296938