Patent ID: 7947750

Claim:
A process for removing a colorant from a colored polymer composition which process comprises immersing the colored polymer composition into a non-aqueous extraction solvent for a time sufficient to lower the initial CIE Lab color values of the colored polymer composition by 50% or more, wherein the non-aqueous extraction solvent is essentially water free, containing less than 5% water by weight based on the total weight of the extraction solvent, and comprises from about 40 to about 98% by weight based on the total weight of the extraction solvent of amine or amide organic base, from about 0.1 to about 20% by weight based on the total weight of the extraction solvent of ammonium salt and from about 0.1 to about 40% by weight based on the total weight of the extraction solvent of C 1-24 alcohol, diol or polyol, to produce a decolorized polymer which is then separated from the extraction solvent and colorant.