Paper making and fiber liberation – Processes of chemical liberation – recovery or purification... – With washing
Patent
1987-11-04
1989-03-07
Chin, Peter
Paper making and fiber liberation
Processes of chemical liberation, recovery or purification...
With washing
162 72, 162 76, 162 77, D21C 902
Patent
active
048103284
ABSTRACT:
An improved method of brown stock washing is disclosed. A nonionic surfactant in combination with a polyelectrolyte dispersant, and preferably a solvent, are utilized in the washing step in the pulping of virgin cellulosic fiber. The methods of the invention provide for the enhanced removal and recovery of cooking chemicals and organics from the pulp.
REFERENCES:
patent: 2144756 (1939-01-01), Fritz
patent: 3021372 (1962-02-01), Dupre et al.
patent: 3444242 (1969-05-01), Rue et al.
patent: 3625909 (1971-12-01), Berg et al.
patent: 3822178 (1974-07-01), von Koeppen et al.
patent: 4162186 (1979-07-01), Wood et al.
patent: 4184912 (1980-01-01), Payton
patent: 4297164 (1981-10-01), Lee
patent: 4347099 (1982-08-01), De Ceuster
patent: 4445971 (1984-05-01), Lappi et al.
patent: 4517098 (1985-05-01), Hann et al.
G. G. Hawley, "The Condensed Chemical Dictionary", Van Nostrand Reinhold Company, New York (1974) at p. 858.
Freis Richard E.
Maloney James E.
Oakes Thomas R.
Chin Peter
Diamond Shamrock Chemicals Company
Jaeschke Wayne C.
Levin Neal T.
Szoke Ernest G.
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