Encapsulation of Menthol in Beeswax by a Supercritical Fluid Technique

Figure 1

Schematic diagram of the modified PGSS process. A: CO₂ cylinder; B: compressor; C: preheater; D: mixer; E#: high-pressure pump; F: double-pass nozzle; G: precipitant; P: pressure gauge; T: thermometer; V#: valve; FM: flow meter; TC: temperature controller; LF#: filter; BPR: back pressure valve.