| 摘要 |
1. A process for the extraction of constituent substances from natural products by means of a pressurised fluid, in particular for the decaffination of tea leaves by means of CO2 , wherein the constituent substances are then bound to an adsorbent, preferably activated carbon, characterised in that the natural product is provided in a layer of a thickness which is small in relation to the dimension to the layer transversely with respect to the direction of flow and the fluid is passed through the layer of the natural product at a rate which changes and in particular increases in the direction of flow. |
