Abstract: This invention concerns a method for the manufacture of a granulated aerogel (1) from a precursor (2), comprising the following steps: mixing the precursor (2) with a synthetic solvent (3) and a hydrolysis agent such as water, and if appropriate a catalyst (4), to obtain a gel, granulating the resulting product, in particular by cutting a jet of said gel, to produce granules, maintaining the granules in contact with the synthetic solvent (3) and the hydrolysis agent, washing the granules by adding a washing solvent to extract in particular the hydrolysis agent and, if appropriate, the catalyst (4), drying of the granules to extract the synthetic solvents (3) and/or washing solvents by sending them supercritical CO2 in excess, the steps of granulating, maintaining, washing and drying being carried out at a pressure higher than that of the critical point of CO2, and these conditions being maintained between these steps.