Method of washing of alkaline pulp by adding carbon dioxide to t

Details Method of washing of alkaline pulp by adding carbon dioxide to t Method of washing of alkaline pulp by adding carbon dioxide to t

1993-07-29

1995-07-04

Alvo, Steve

Paper making and fiber liberation

Processes of chemical liberation, recovery or purification...

With washing

162 63, D21C 902

Patent

active

054297176

ABSTRACT:
Method in the washing of alkaline, cellulosic pulp, for example sulphate pulp, CTMP and CMP pulp, the washing being effected in at least one stage. By an addition of carbon dioxide, there will be realized greatly reduced washing losses of, primarily, inorganic ions, as well as improved washing-out of substances which give rise to chemical oxygen demand (COD).

REFERENCES:
patent: 4000033 (1976-12-01), Marcel et al.
patent: 4042452 (1977-08-01), Arhippainen et al.
patent: 4724045 (1988-02-01), Ackel
Trinh et al, "Sodium Equilibrium In Craft Pulp Washing"., J. of Pulp & Paper Sci: vol. 13 No. 3; May 1987 (Presented at 1985 Tappi Pulping Conf. Hollywood, Fla.).
"Pulp Washing" (Proj No. 262); Pulp & Paper Research last of Canada Progress Report, Sep. 1982.
Derwent's Abstract No. 91532 C/51, SU730913.
Derwent's Abstract No. 18030 C/10, SU670652.

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