Process for extracting a substance or a substance group from a mixture

摘要

A process for extracting a substance or a substance group from a mixture utilizes a solvent for separation. The mixture is treated with the solvent in the presence of a sorbent as the stationary phase, wherein the solvent is conducted past the sorbent in a co-current flow with the mixture or in a counter-current flow against the mixture, or wherein the solvent is conducted past the non-moving mixture and the sorbent. The solvent and the sorbent are selected such that the holding effect of the sorbent supports the separation by the solvent during the separation procedure and/or subsequently supplements the separation by interacting with the solvent as the mobile phase.