Pulp decolor process

Paper making and fiber liberation – Processes of chemical liberation – recovery or purification... – With regeneration – reclamation – reuse – recycling or...

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162 60, 210704, 210705, 210707, 210710, 210711, 210725, 210734, 210917, 210928, 422242, D21C 1100

Patent

active

047240458

ABSTRACT:
A process for the decolorization of alkaline pulp such as that derived from paper waste water wherein the waste water is contacted with a strong mineral acid, contacted with a coagulated agent and then the solid coagulum is separated and neutralized to liquify the color bodies in concentrated form.

REFERENCES:
patent: 3412018 (1968-11-01), Monzie
patent: 3740363 (1973-06-01), Fuller
patent: 3829388 (1974-08-01), Lange et al.
patent: 4000033 (1976-12-01), Nicolle et al.
patent: 4008161 (1977-02-01), Wong
patent: 4058458 (1977-11-01), Svarz
patent: 4089780 (1978-05-01), Svarz et al.
patent: 4179329 (1979-12-01), Svarz
patent: 4374027 (1983-02-01), Severeid et al.
patent: 4490257 (1984-12-01), Becker
"The Fuller Treatment System", The Rust Engineering Co. Brochure.
"Waste Water Treatment and Disposal Options", Jordan Associates, Study Conducted for Continental Forest Ind., Nov. 1982, pp. B-11 to B-38.

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