DE2810878

A process for recovering caustic alkali from spent alkali liquor, in which a spent alkali liquor and iron oxide are roasted to obtain a product containing alkali ferrate and the product of roasting is hydrolyzed at a temperature over 110 DEG C. and under pressurized conditions where liquid phase is...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser:	IMAGIRE, YOSHIYUKI, TOKIO/TOKYO, JP, KURIHARA, TOSHIAKI, IBARAKI, JP, KINOSHITA, YOSHIAKI, HINO, TOKIO/TOKYO, JP
Format:	Patent
Sprache:	eng
Schlagworte:	APPARATUS THEREFOR CHEMISTRY COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSESC01D OR C01F COMPOUNDS OF ALKALI METALS, i.e. LITHIUM, SODIUM, POTASSIUM,RUBIDIUM, CAESIUM, OR FRANCIUM INORGANIC CHEMISTRY METALLURGY PAPER-MAKING PRODUCTION OF CELLULOSE PRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCESFROM CELLULOSE-CONTAINING MATERIALS REGENERATION OF PULPING LIQUORS TEXTILES
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Beschreibung
Zusammenfassung:	A process for recovering caustic alkali from spent alkali liquor, in which a spent alkali liquor and iron oxide are roasted to obtain a product containing alkali ferrate and the product of roasting is hydrolyzed at a temperature over 110 DEG C. and under pressurized conditions where liquid phase is retained, thereby recovering caustic alkali in the form of an aqueous solution of a concentration higher than approximately 15 wt% containing dissolved iron in an extremely small concentration.