High Pressure Extraction Distraction

With high pressure extraction, (HPE) [6.82-6.86] highly compressed gases such as carbon dioxide, nitrogen, argon, ethylene, propane, etc., (Table 6-14) are mainly used as solvents in a supercritical state. High-boiling substances are also dissolved  

HPE is operated under pressure from 50-300 bar and in the temperature range 10-100°C above the critical temperature of the solvent. Gentle thermal separation of substances with high boiling points is achieved. 

In the application of HPE for the processing of food and luxury goods, carbon dioxide is used as the important solvent. Carbon dioxide exhibits good loadabil-ity for key components, is physiologically safe, and allows gentle thermal separation under easily controllable pressures due to the favorable physical properties (see Table 6-14 a). 

In the simplest case, an HPE unit consists of an extractor and a separator to separate the extract phase. In the extractor the supercritical solvent mainly dissolves the product (key component) under high pressure and low temperature and to release it in the separator, under low pressure and/or 

BoUmann basket conveyor extractor Hildebrandt screw convQfor extractor  

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In high pressure extraction (HPE, distraction) compressed gas, usually in the supercritical or liquid state, is used as the solvent. Figure 6-2 shows a simplified block diagram for high pressure extraction by pressure and temperature swing, or by absorption or adsorption. HPE is also applied on a technical scale, mainly in the fields of ... 

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