Principles of the extraction with compressed Carbon Dioxide

Applewax | Principles of the extraction with compressed Carbon Dioxide

Introduction:
"We live in a world of mixtures - the air we breathe, the food we eat, the gasoline in our automobiles ...:"1. Therefore raw materials as well as synthetic products have to be separated into desired and undesired components for further use. Normally, the various types of separation processes are defined by the kind of energy used, e.g. mechanical or thermic ones. The separation of solid or liquid substance mixtures by means of extraction which is of interest in the following belongs to the group of thermic separation procedures. In the case of extraction, the separation is effected by means of an auxiliary agent, the solvent. The different solubilities of the individual components in the phases involved, i.e. the selectivity of the phase transition determine the success of separation. After the separation step, the solvent is removed, e.g. by evaporation in order to obtain the dissolved components.

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Extracting the essence of nature
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