| 摘要 |
Continuous extraction of particulate solid material, particularly vegetable or animal raw material, with a highly compressed gas as a solvent includes forming a suspension by mixing a solid material with a liquefied gas in a suspension container under pressure which is lower than an extraction pressure, compressing the suspension to an extraction pressure greater than 10 bar and bringing to an extraction temperature, supplying the suspension into an extraction container which is supplied with fresh solvent in a counterstream to the solid material and from which an extract rich solution is withdrawn and thereafter the extracted solid material suspended in the liquefied gas is withdrawn from the extraction container, and continuously separating the withdrawn extract-poor solid material from the gas and discharging the same.
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