Brightening color dyed wastepaper with a bleaching agent and a q

Paper making and fiber liberation – Processes of chemical liberation – recovery or purification... – Waste paper or textile waste


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162 7, 162 8, D21B 108




A method for brightening fiber from colored waste paper comprising bleaching pulp from colored waste paper with sodium hydrosulfite, formamidine sulfinic acid, or hydrogen peroxide in the presence of a selected quaternary compound.

patent: 1572478 (1926-02-01), Hammond
patent: 1923178 (1933-08-01), Ulrich et al.
patent: 2003928 (1935-06-01), Evans et al.
patent: 2019124 (1935-10-01), Evans et al.
patent: 2164930 (1939-07-01), Lubs
patent: 2218479 (1940-10-01), Peterson et al.
patent: 2248128 (1941-07-01), Seymour et al.
patent: 2525770 (1950-10-01), Cook et al.
patent: 2587597 (1952-03-01), Cook et al.
patent: 2860944 (1958-11-01), Young
patent: 2902453 (1959-09-01), Matlin
patent: 2985500 (1961-05-01), Janson et al.
patent: 2986488 (1961-05-01), Weisgerber et al.
patent: 3074774 (1963-01-01), Sapers et al.
patent: 3361794 (1968-01-01), Wakeman et al.
patent: 3554863 (1971-01-01), Hervey et al.
patent: 3591325 (1971-07-01), Sapers
patent: 3617439 (1971-11-01), Chapman
patent: 3666409 (1972-05-01), Yoshikawa et al.
patent: 3960649 (1976-06-01), Sullivan
patent: 4013505 (1977-03-01), Balcar et al.
patent: 4144122 (1979-03-01), Emanuelsson et al.
patent: 4264412 (1981-04-01), Hasler et al.
patent: 4441962 (1984-04-01), Osborn
patent: 4557801 (1985-12-01), Avis
patent: 4618400 (1986-10-01), Wood et al.
patent: 4632730 (1986-12-01), Ulubay et al.
patent: 4666558 (1987-05-01), Wood et al.
patent: 4710267 (1987-12-01), Elsby et al.
patent: 5013404 (1991-05-01), Christiansen et al.
patent: 5129987 (1992-07-01), Joachimides et al.
Berger et al. "Advanced Bleaching Technology for Secondary Fibers", Pacific Paper Expo, MB, Canada, Fall 1990.
Dyeing and Chemical Technology of Textile Fibers, by E. R. Troutman (fifth edition, Charles Griffin and Co. Ltd., Great Britain, 1975).
Organic Reactions, vol. 14 (John Wiley & Sons, Inc., New York, 1987) at pp. 388-393.
C. R. Noller, Textbook of Organic Chemistry (W. B. Saunders Co., Philadelphia, Pennsylvania, 1966) at p. 244.
Advanced Organic Chemistry, J. March (third edition, John Wiley & Sons, New York, 1985) at pp. 364-368, 845.
TAPPI, Standard Method T218 om-91, "Forming handsheets for reflectance testing of pulp (Buchner funnel procedure)" 1991.
TAPPI, Standard Method T494 om-88, "Tensile breaking properties of paper and paperboard (using constant rate of elongation apparatus)" 1988.
TAPPI, Standard Method T525 om-86, "Diffuse brightness of pulp (d/", 1986.
TAPPI, Standard Method T205 om-88, "Forming handsheets for physical tests of pulp", 1988.


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