Paper making and fiber liberation – Processes of chemical liberation – recovery or purification... – Waste paper or textile waste
Patent
1996-12-03
1998-01-13
Lithgow, Thomas M.
Paper making and fiber liberation
Processes of chemical liberation, recovery or purification...
Waste paper or textile waste
162 55, 210703, 2102212, 210295, 210415, 209 17, 209169, 209170, 209273, 209306, B03D 124, B03D 116, B01D 3600
Patent
active
057074887
ABSTRACT:
A process for cleaning recycled pulp includes an upright cylindrical vessel having an upright cylindrical screen member open at its top and bottom ends and having a perforated screen wall which is centered on a vertical axis in the vessel. A plurality of upright, elongated blades are mounted for rotation on the vertical axis in close proximity to the screen wall. A pulp slurry entrained with pressurized air is introduced under pressure into an inlet in the bottom of the vessel. The rotating blades clear the screen wall while creating a rising vortex of air bubbles produced by the pressurized air for carrying ink and/or contaminant particles upwardly through the inner volume of the screen member. An "accepts" outlet at the center of the vessel draws off pulp in suspension that has been passed through the screen wall. A "rejects" outlet at the top of the vessel draws off ink and contaminant particles carried by the air bubbles in the upwardly-moving vortex. In related processes, the pulp slurry is processed in successive screen stages to refine the rejects stream to a high concentration while passing an accepts stream of high brightness and cleanliness.
REFERENCES:
patent: 1833804 (1931-11-01), Watanabe
patent: 1833805 (1931-11-01), Watanabe
patent: 3221886 (1965-12-01), Lamort
patent: 3256995 (1966-06-01), Schmid
patent: 3557956 (1971-01-01), Braun
patent: 3561603 (1971-02-01), Salomon
patent: 3635788 (1972-01-01), Braun
patent: 3677402 (1972-07-01), Holz
patent: 3873410 (1975-03-01), Chupka
patent: 3912579 (1975-10-01), Braun
patent: 3912622 (1975-10-01), Bolton
patent: 4013505 (1977-03-01), Balcar
patent: 4076578 (1978-02-01), Puddington
patent: 4147616 (1979-04-01), Balcar
patent: 4157952 (1979-06-01), Krofta
patent: 4166028 (1979-08-01), Weber
patent: 4186094 (1980-01-01), Hellberg
patent: 4202761 (1980-05-01), Holz
patent: 4214982 (1980-07-01), Pfalzer
patent: 4215447 (1980-08-01), Gartland
patent: 4289628 (1981-09-01), Disselbeck
patent: 4328096 (1982-05-01), Chupka
patent: 4397741 (1983-08-01), Miller
patent: 4399028 (1983-08-01), Kile
patent: 4512888 (1985-04-01), Flynn
patent: 4518459 (1985-05-01), Freis
patent: 4548674 (1985-10-01), Hageman
patent: 4620671 (1986-11-01), Skaar
patent: 4634521 (1987-01-01), Simola
patent: 4663030 (1987-05-01), Chupka
patent: 4710287 (1987-12-01), Henrich
patent: 4726880 (1988-02-01), Smith
patent: 4795560 (1989-01-01), Chupka
patent: 4851111 (1989-07-01), Martin
patent: 4997549 (1991-03-01), Atwood
patent: 5023986 (1991-06-01), Gero
patent: 5069751 (1991-12-01), Chamblee
patent: 5073234 (1991-12-01), Mollett
patent: 5078859 (1992-01-01), Satomi
patent: 5102500 (1992-04-01), Darlington
patent: 5126039 (1992-06-01), Silander
patent: 5131980 (1992-07-01), Chamblee
patent: 5141598 (1992-08-01), Richman
patent: 5173177 (1992-12-01), Greenwood
patent: 5186332 (1993-02-01), Hatton
patent: 5323913 (1994-06-01), Papetti
patent: 5381906 (1995-01-01), Satomi
International Paper Company
Lithgow Thomas M.
LandOfFree
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