The experimental results show that lower temperature ismore favourable for Gac oil extraction at 200 bar (Fig. 2). After120 min of extraction, a maximum oil recovery of 28.9% is obtainedat 343 K, while oil recovery can reach 76.7% at 313 K. At 400 bar,in contrast, Gac oil recovery increases at a higher temperature(Fig. 3). At this pressure and specific flow rate of 70 kg h−1kg−1,increasing temperature from 313 to 343 K increases the Gac oilrecovery from 90.1 to 95.9% after 120 min of extraction.