Fig. 1.

The effect of different extraction factors on the yield of CPP. A The extraction yield curve (rose red) of CPP in different temperatures when the extraction time is 80 min, the ratio of material to liquid is 1:16, and the particle size is 180 µm. The extraction yield curve (baby blue) of CPP in different solid–liquid ratio when the extraction temperature is 80 °C, the extraction time is 80 min, and the particle size is 180 µm. B The extraction yield curve (green) of CPP in different time when the extraction temperature is 80 °C, the ratio of solid to liquid is 1:16, and the particle size is 180 µm. The extraction yield curve (dark blue) of CPP in different particle size when the extraction temperature is 80 °C, the ratio of solid to liquid is 1:16, and the extraction time is 80 min. The model prediction and experimental curve under different particle sizes (420 μm (C),150 μm (D), 280 μm (E))