Process for recovering chemicals from the waste liquors of sulfa

Details Process for recovering chemicals from the waste liquors of sulfa Process for recovering chemicals from the waste liquors of sulfa

1975-03-10

1978-06-06

Vertiz, O. R.

Paper making and fiber liberation

Processes of chemical liberation, recovery or purification...

With regeneration, reclamation, reuse, recycling or...

162DIG8, 423207, 423DIG3, D21C 1112

Patent

active

040935086

ABSTRACT:
A process for the recovery of chemicals from the waste liquors of sulfate cellulose digestion and from the waste waters of bleaching, wherein a melt from a soda-ash roaster, mainly containing sodium sulfide and sodium carbonate, but also sodium chloride, is dissolved and clarified to produce green liquor containing carbonate, sulfide and chlorides is dissolved. The carbonate is separated from the sulfide and the chlorides, at least part of the sodium chloride is separated from the sulfide in solution, at least part of the carbonate is causticized into hydroxide, and the hydroxide and sulfide in solutions is mixed together in a ratio suitable to form a digestion solution with a desired sulfide content.

REFERENCES:
patent: 2862887 (1958-12-01), Boyer
patent: 3120464 (1964-02-01), Berser
patent: 3453174 (1969-07-01), Rapson
patent: 3698995 (1972-10-01), Rapson
patent: 3740307 (1973-06-01), Rapson et al.
patent: 3740308 (1973-06-01), Rapson et al.
patent: 3746612 (1973-07-01), Rapson
patent: 3909344 (1975-09-01), Lukes
patent: 3945880 (1976-03-01), Lukes et al.
patent: 3950217 (1976-04-01), Reeve
patent: 3954552 (1976-05-01), Lukes et al.
patent: 3986923 (1976-10-01), Reeve

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