Process for the production of sodium aluminate

Sodium aluminate of the general formula NaAlO2, NaAlO2 x 1.5 H2O and/or NaAlO2 x XH2O is prepared by reaction of hydrated aluminum and/or aluminium hydride with an excess of sodium hydroxide. In this process, first a suspension of the reactants is prepared in a mixing vessel at temperatures of 20 to...

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Bibliographische Detailangaben
Hauptverfasser:	DILLENBURG, HELMUT, HEINRICH, DIETMAR, HEINEN, WOLFGANG
Format:	Patent
Sprache:	eng ; fre ; ger
Schlagworte:	CHEMISTRY COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM,CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THERARE-EARTH METALS INORGANIC CHEMISTRY METALLURGY PERFORMING OPERATIONS PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL SEPARATION TRANSPORTING
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Beschreibung
Zusammenfassung:	Sodium aluminate of the general formula NaAlO2, NaAlO2 x 1.5 H2O and/or NaAlO2 x XH2O is prepared by reaction of hydrated aluminum and/or aluminium hydride with an excess of sodium hydroxide. In this process, first a suspension of the reactants is prepared in a mixing vessel at temperatures of 20 to 120 DEG C and this suspension is passed under pressure through at least one heatable reaction tube connected to the mixing vessel and the sodium aluminate solution obtained is subjected to spray-drying, in which gas outlet temperature of the gas used for the spray-drying is brought to 130 to 190 DEG C.