FIELD: chemistry of high molecular weight compounds. SUBSTANCE: purification polyesters against heteropoly acids involves dissolution of said raw polyester, centrifugation thus prepared solution within 5-60 min at 25-100 C and 1000-10000 r.p.m. and distillation of solvent. Mentioned above dissolution is carried out in inert solvent which is chosen of saturated aliphatic or aromatic hydrocarbons having 5-15 carbon atoms or of their mixture. The process takes place in the presence of water, its quantity being 0.1-1 of polyester quantity. Proposed purification against heteropoly acids is single-step process. Thus prepared polymers contain not more than 0.002 of heteropoly acids. EFFECT: improves efficiency of method. 2 tbl
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