PROCESSO PARA A PREPARACAO HIDROTERMAL DE SOLUCOES DE SILICATO DE SODIO

Sodium silicate solutions having an SiO2:Na2O weight ratio of 1.95 to 1.6:1 are prepared hydrothermally by reaction of sand, sodium hydroxide and water. The invention is characterised in that the sand is reacted in less than a stoichiometric amount compared with the 2:1 weight ratio of the batch and...

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Bibliographic Details
Main Authors GUENTHER ABITZSCH, HELMUT REINHARDT
Format Patent
LanguagePortuguese
Published 18.04.1989
Edition4
Subjects
CHEMISTRY
COMPOUNDS THEREOF
INORGANIC CHEMISTRY
METALLURGY
NON-METALLIC ELEMENTS
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Summary:Sodium silicate solutions having an SiO2:Na2O weight ratio of 1.95 to 1.6:1 are prepared hydrothermally by reaction of sand, sodium hydroxide and water. The invention is characterised in that the sand is reacted in less than a stoichiometric amount compared with the 2:1 weight ratio of the batch and at temperatures between 190 and 240 DEG C.
Bibliography:Application Number: BR19888804623