A decolorization method of a polyester fabric, including the following steps, is provided. A first extraction treatment is performed on the polyester fabric using a recycled solvent, so that a first portion of a dye in the polyester fabric moves into the recycled solvent. A first filtering treatment is performed on the recycled solvent and the polyester fabric to obtain a treated polyester fabric. A second extraction treatment is performed on the treated polyester fabric using a fresh solvent, so that a second portion of the dye in the treated polyester fabric moves into the fresh solvent. A second filtering treatment is performed to obtain a decolored polyester fabric and the recycled solvent.

A decolorization method of a polyester fabric, including the following steps, is provided. A first extraction treatment is performed on the polyester fabric using a recycled solvent, so that a first portion of a dye in the polyester fabric moves into the recycled solvent. A first filtering treatment is performed on the recycled solvent and the polyester fabric to obtain a treated polyester fabric. A second extraction treatment is performed on the treated polyester fabric using a fresh solvent, so that a second portion of the dye in the treated polyester fabric moves into the fresh solvent. A second filtering treatment is performed to obtain a decolored polyester fabric and the recycled solvent.

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 (ScCO.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 ScCO.sub.2; a dyestuff vessel for mixing a dyestuff and the ScCO.sub.2 to obtain ScCO.sub.2-mixed dyestuff; a dyeing vessel for dyeing the textile by circulating the ScCO.sub.2 and the ScCO.sub.2-mixed dyestuff between the dyeing vessel and the dyestuff vessel; and one or more cyclone separators for removing the dyestuff from the ScCO.sub.2-mixed dyestuff to obtain separated liquefied CO.sub.2.

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 (ScCO.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 ScCO.sub.2; a dyestuff vessel for mixing a dyestuff and the ScCO.sub.2 to obtain ScCO.sub.2-mixed dyestuff; a dyeing vessel for dyeing the textile by circulating the ScCO.sub.2 and the ScCO.sub.2-mixed dyestuff between the dyeing vessel and the dyestuff vessel; and one or more cyclone separators for removing the dyestuff from the ScCO.sub.2-mixed dyestuff to obtain separated liquefied CO.sub.2.

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.

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.