Abstract: In processes for high pressure extraction, a gaseous solvent under high pressure is conducted through an extractor filled with solid material and in this process takes on organic components from the solid materials. These are subsequently separated in a separator and the solvent is again delivered to the extractor. In particular, when gas mixtures having a reduced solvating power are used as solvent to increase the selectivity of the components to be dissolved out, high gas throughputs become necessary to produce a certain amount of product. In order to reduce the high gas throughputs, the solid materials are soaked with a gaseous solvent under high pressure without gas extraction before the circulation process begins. The solvent composition as well as the soaking conditions may deviate from the extraction conditions. In this process, prior to the extraction stage, the solid material in the extractor is soaked with a gaseous solvent under high pressure without the occurrence of a gas flow.

Abstract: Mixtures of substances containing organic components are segregated by extraction with a gaseous solvent in high pressure extraction. One additive component is admixed to the charged solvent, whereby the solvent capacity of the solvent is strongly reduced and consequently a precipitation is achieved for at least a portion of the components to be captured as an extract.

Abstract: High pressure of nicotine with a compressed gaseous solvent is used for producing low nicotine tobacco. A mixture of nitrogen and carbon dioxide with the nitrogen being 50-80 percent of the mixture is used. The extraction is carried out at pressures between 250 and 600 bar at temperatures above 50.degree. C.