Method for preparing Al2O3-SiO2 aerogel

The invention discloses a method for preparing porous aluminum oxide aerogel from coal ash. The method comprises the following steps: a, carrying out acid leaching; b, removing iron with an aluminum salt solution; c, preparing silicic acid; d, preparing Al2O3-SiO2 gel; e, aging the Al2O3-SiO2 gel; a...

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Bibliographic Details
Main Author GUO ZHAOHUA
Format Patent
LanguageEnglish
Published 06.05.2015
Subjects
CHEMISTRY
COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM,CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THERARE-EARTH METALS
COMPOUNDS THEREOF
INORGANIC CHEMISTRY
METALLURGY
NON-METALLIC ELEMENTS
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Summary:The invention discloses a method for preparing porous aluminum oxide aerogel from coal ash. The method comprises the following steps: a, carrying out acid leaching; b, removing iron with an aluminum salt solution; c, preparing silicic acid; d, preparing Al2O3-SiO2 gel; e, aging the Al2O3-SiO2 gel; and f, carrying out supercritical drying. Compared with the conventional method, the method disclosed by the invention has the advantages of low energy consumption, cheap raw materials, low production cost, broad technology conditions and the like.
Bibliography:Application Number: CN20141838447