The goal of this work was to study seed oil extraction and solubility under ultra-high extraction pressures.
If only two district heaters are installed, the one with the highest extraction pressure is neglected and in case of one district heater only the intermediate one is considered.
Surprisingly and likely due to the high extraction pressure used (103 bars), these conditions appeared to be the best ones both for extracting xanthophylls such as lutein, zeaxanthin or β-cryptoxanthin and carotenes such as β-carotene, which present quite different polarities.
The operational parameters of PLE, such as extraction solvent, temperature, pressure, static extraction time, flush volume and cycles were optimized by univariate approach coupled with central composite design (CCD) in order to obtain the highest extraction efficiency.
The aim of the study was to use a sequence of high pressure extraction and hydrolysis processes in a cascade to create high potential value added products, namely, proteins, fermentable sugars and lignin.
High pressure – high temperature extraction (HPTE) of D-limonene from lemon peels was better than Soxhlet extraction even with low matrix/solvent extraction (1 4) in terms of energy saving (0.6 kW h vs 2.5 kW h), extraction time (30 min vs 4 h) and product yield (2.97% vs 0.95%).
Nevertheless, astaxanthin is a large molecule with low solubility in scCO2 that usually requires long extractions at high pressures.
This study provides an example of biorefining of raspberry pomace by using high pressure extraction.
Solar field is used to preheat feedwater to replace high-pressure extraction steam of the original coal-fired unit.
However, the optimization of any high pressure extraction process requires the knowledge of the solubility of the target compounds to be extracted.
