Extraction yield of RBO by sub-CW was enhanced from 141 to
249 (mg/g dry matter) by raising the temperature from 120 to
240 C. Residence time was another important factor which influenced
the yield of RBO; the longer the residence time was, the
more RBO was extracted (see Table 1). It was also observed RBO
color was a function of extraction time and sub-CW temperature.
It became darker by increasing the extraction time and temperature,
especially at higher than 200 C (see Fig. 6).