초록 ▼

A method for removing color and extracting dyes from ionically dyeable polymeric materials is provided. The method includes contacting the ionically dyeable polymeric material with a swelling agent for the material under conditions sufficient to effect diffusion of the dye from the material. The pro

A method for removing color and extracting dyes from ionically dyeable polymeric materials is provided. The method includes contacting the ionically dyeable polymeric material with a swelling agent for the material under conditions sufficient to effect diffusion of the dye from the material. The process is especially useful for removing colors from ionically dyeable polymeric materials as part of a recycling process for such materials. Also, the extracted dye may be recovered for re-use as the swelling agent and contacting composition are substantially non-reactive with the dye.

대표청구항 ▼

[ What is claimed is:] [1.] A process for removing colorants from an ionically dyeable polymeric material, comprising:contacting the polymeric material with a swelling agent under conditions sufficient to promote substantial diffusion of the colorants out of the polymeric material without substantia

[ What is claimed is:] [1.] A process for removing colorants from an ionically dyeable polymeric material, comprising:contacting the polymeric material with a swelling agent under conditions sufficient to promote substantial diffusion of the colorants out of the polymeric material without substantial dissolution or degradation of the polymeric material; where the polymeric material is selected from the group consisting of polyamides and acrylics.