Conversion of pulp and paper mill waste solids to a papermaking

Details Conversion of pulp and paper mill waste solids to a papermaking Conversion of pulp and paper mill waste solids to a papermaking

1993-01-19

1994-07-26

Jones, W. Gary

Paper making and fiber liberation

Processes and products

Reclamation, salvage or reuse of materials

162 7, 162 6, 162 55, 162DIG9, D21C 502

Patent

active

053324749

ABSTRACT:
A process for the production of a papermaking filler product from the fiber fines/clay fraction of a pulp, paper, paperboard, or deinking mill waste solids such process comprising the reaction of said solids with sufficient acid to lower and maintain a pH of less than 5.0. Such process yields improvement in the drainage characteristics of the material. Bleach can be added or the pH raised back to neutral to further improve the specific resistance and/or brightness of the material.

REFERENCES:
patent: 3220546 (1965-11-01), Gardner
patent: 3833468 (1974-09-01), Boniface
patent: 3876497 (1975-04-01), Hoffman
patent: 3897301 (1975-07-01), Bauman et al.
patent: 4390395 (1983-06-01), De Ceusler et al.
patent: 4983258 (1991-01-01), Maxham
patent: 5002633 (1991-03-01), Maxham
patent: 5137599 (1992-08-01), Maxham

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