DE2537969

DE2537969

Sodium aluminate is recovered from solns., in which the Na2O content is 45-350 g/l pref. 250-280 g/l. and the molar ratio Na2O:Al2O3 is 1.1:1.8 (pref. 1.1-1.3) by evapn. in a fluidised bed at 250-400 degrees C. Dil solns. contg. 45-180 g Na2O/l are pref. preliminarily conc. to 250-350 g/l NaOH/l. in...

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Bibliographische Detailangaben
Hauptverfasser: NISSE, LEONID SEMJONOVIC, LENINGRAD, SU, SUBOCEV, DMITRIJ JEFIMOVIC, RYSKOV, ALEKSANDR STEPANOVIC, PEVZNER, ILJA SACHAROVIC, TUMARINSON, VITALIJ JAKOVLEVIC, JEREMIN, NIKOLAJ IVANOVIC
Format: Patent
Sprache:eng
Schlagworte:
CHEMISTRY
COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM,CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THERARE-EARTH METALS
INORGANIC CHEMISTRY
METALLURGY
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Zusammenfassung:Sodium aluminate is recovered from solns., in which the Na2O content is 45-350 g/l pref. 250-280 g/l. and the molar ratio Na2O:Al2O3 is 1.1:1.8 (pref. 1.1-1.3) by evapn. in a fluidised bed at 250-400 degrees C. Dil solns. contg. 45-180 g Na2O/l are pref. preliminarily conc. to 250-350 g/l NaOH/l. in an evaporator(s), opt. under vacuum. This process is esp. suitable for the recovery of sodium aluminate from dil. solns. such as the washing water from the Bayer process. This process is highly effective and more economical then in the known similar processes. The prod. can be obtd. in the form of powder or granules.