Process for the preparation of a sodium sulphite containing liqu

Details Process for the preparation of a sodium sulphite containing liqu Process for the preparation of a sodium sulphite containing liqu

1982-01-29

1984-11-06

Alvo, Steve

Paper making and fiber liberation

Processes of chemical liberation, recovery or purification...

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

162 83, 423512A, 423DIG3, C01B 1762, D21C 1102

Patent

active

044810741

ABSTRACT:
The method relates to a process in the preparation of the cooking liquor for sodium sulphite pulp for carrying out a reaction between sodium bisulphite and sodium bicarbonate and/or sodium carbonate by bringing solutions containing said compounds into contact with each other. The contact between the solution and gas phase takes place in a layer of tower packings. The carbon dioxide produced as a reaction product is allowed to pressurize the reaction vessel a pressure of 1 to 5 bar by restricting the flow escaping from the reaction vessel and by recovering at the same time the carbon dioxide escaping from the reaction vessel at the said pressure in order to use it for carbonation of a solution of green liquor and/or sodium carbonate.

REFERENCES:
patent: 2987432 (1961-06-01), Whitney et al.
patent: 4148684 (1979-04-01), Farin

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