An apparatus for treating a fiber material such as textiles is shown. The fiber material is fed to a reactor volume having an upper and a lower end, and the reactor volume is limited by a first filter in a lower end of the reactor volume and a second filter in the upper end of the reactor volume. A flow of solvent is led through the reactor volume entering the reactor volume through the first filter and exiting the reactor volume through the second filter.

A method and an integrated system for dyeing synthetic, natural, and blended textiles in the form of fabrics, yarns, and garments are provided. The integrated system includes a first pressurizing pump for pressurizing liquefied CO.sub.2 to supercritical CO.sub.2 (Sc-CO.sub.2); a second pressurizing pump for pressurizing CO.sub.2 to liquefied CO.sub.2; a liquefied CO.sub.2 storage vessel for storing the liquefied CO.sub.2 and the separated liquefied CO.sub.2 from the one or more cyclone separators; a heater for heating the Sc-CO.sub.2; a dyestuff vessel for mixing a dyestuff and the Sc-CO.sub.2 to obtain Sc-CO.sub.2-mixed dyestuff; a dyeing vessel for dyeing the textile by circulating the Sc-CO.sub.2 and the Sc-CO.sub.2-mixed dyestuff between the dyeing vessel and the dyestuff vessel; and one or more cyclone separators for removing the dyestuff from the Sc-CO.sub.2-mixed dyestuff to obtain separated liquefied CO.sub.2.