Paper making and fiber liberation – Processes and products – Reclamation – salvage or reuse of materials
Patent
1992-12-10
1994-11-29
Jones, W. Gary
Paper making and fiber liberation
Processes and products
Reclamation, salvage or reuse of materials
162 55, 162189, 162264, 210193, 210928, D21F 166
Patent
active
053686934
ABSTRACT:
White water from a paper machine is treated in an improved fiber recovery process, i.e., the "save-all" process. Prior to the mixing of sweetener stock into the white water the sweetener stock is fractionated (undiluted) into fine and coarse fiber fractions, of which only the coarse fraction is fed as sweetener stock into the white water. The inlet line for the sweetener stock is provided with a fractionation apparatus for removing the fine fraction from the sweetener stock. Treatment apparatus may also be utilized to separate the white water into fine and coarse fractions before passing the fine fraction to a mixer for mixing with the sweetener stock coarse fraction.
REFERENCES:
patent: 1670874 (1928-05-01), Bankus et al.
patent: 3833468 (1974-09-01), Boniface
patent: 4405450 (1983-09-01), Selder
patent: 4571298 (1986-02-01), Holz
patent: 4619761 (1986-10-01), Franzen
patent: 4938843 (1990-07-01), Lindhal
Perkins et al, "Brown stock washing efficiency", TAPPI, Mar. 1954, vol. 37, No. 3, pp. 83-89.
Stephenson, "Preparation & Treatment of Wood Pulp", McGraw Hill, 1950, pp. 763-775, vol. I.
Morrison H. A., "White water re-use & Disposal", The Paper Industry & Paper World, Jul. 1946, pp. 580-581.
A. Ahlstrom Corporation
Jones W. Gary
Nguyen Dean T.
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