Method and apparatus for manufacturing silica aerogel blanket

A method of manufacturing a silica aerogel blanket, comprising:

• (1) drying a silica hydrogel through a supercritical drying process using a supercritical extractor;
• (2) separating an extract discharged from the supercritical extractor into a gaseous phase comprising CO2 and a liquid phase comprising a solvent through a primary separator under the conditions of a pressure of 60 bar to 90 bar and a temperature of 35° C. to 60° C. to discharge the gaseous phase and then introducing the liquid phase discharged from the primary separator into a secondary separator under the conditions of a pressure of 5 bar to 30 bar and a temperature of 25° C. to 40° C. to further separate the liquid phase into a gaseous phase comprising CO2 and a liquid phase comprising a solvent to discharge the gaseous phase and the liquid phase;
• and
• (3) condensing the gaseous phase comprising CO2 discharged from the primary separator and the secondary in a condenser, wherein
• the gaseous phase in the condenser has a temperature of 17° C. or higher and a pressure of 60 bar to 90 bar.