An extraction apparatus comprises an extraction vessel configured to remove an extracted material from a source material in contact with a process fluid to form a mixture. The apparatus further comprises a separation chamber and a process fluid circulation conduit, the conduit comprising a separation portion configured to receive the mixture and permit a portion of the extracted material to separate from the mixture within the separation chamber. The apparatus further comprises a temperature regulator configured to permit re-circulation of a temperature regulation fluid and regulate the temperature of the process fluid.