Figure 1 Schematic diagram showing the flow-type extraction apparatus used in the soft hydrothermal process. (1) Water softener, (2) water tank, (3) plunger pump, (4) steam generator, (5) condenser, (6) back pressure regulator, (7) line heater, (8) reactor, (9) reactor heater, (10) safety valve, (11) steam trap, (12) control valve, (13) condenser, (14) extract reservoir, (15) deodorization, (16) N2 gas, (17) compressor, (18) N2 gas mass flow controller (19) sample cages