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D21C—PRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCES FROM CELLULOSE-CONTAINING MATERIALS; REGENERATION OF PULPING LIQUORS; APPARATUS THEREFOR
D21C11/00—Regeneration of pulp liquors or effluent waste waters
D21C11/04—Regeneration of pulp liquors or effluent waste waters of alkali lye
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Processing Of Solid Wastes
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GB190908175D1908-04-141909-04-05Improved Process of Treating Waste Liquors from Soda Pulp Mills.
ExpiredGB190908175A
(en)
Perfeccionamientos en procedimientos para recuperacion qui- mica de hidroxido sodico y recuperacion termica de las le- jias negras residuales de la fabricacion de celulosa.
Process for preparing alkali sulphite or alkali bisulphite solutions from waste liquors obtained in the digestion of cellulose with alkali sulphur compounds
Improvements in Treating the Liquors Resulting from the Manufacture of Cellulose or Fibres by the Sulphite Process in order to obtain Useful Products therefrom.