Process for manufacturing monolithic aerogels thus obtained silica and aerogels.

THIS PROCESS FOR PRODUCING silica aerogels Monolithic IS: hydrolyzing and polycondensing in an acid medium a mixture of a compound ORGANIC SILICON AND SOLVENT ORGANIC FORMED BY ethylacetoacetate, FOR A GEL TRANSPARENT - AND REPLACE THE SOLVENT Organic by liquid carbon dioxide; AND FINALLY, IN EVACUATE THE CARBON DIOXIDE UNDER CONDITIONS SUCH supercriticality CARBON DIOXIDE FOR A airgel.