Liquid liquid phase equilibria (LLE) of six ternary mixtures, methanol (1) + tetrahydrofuran (THE) (2) hyperbranched polymer (111313) Boltorn U3000 (B-U3000) (3)), (ethanol (1) + THE (2) + B-U3000 (3)), (methanol ( I) + methyl tert-butyl ether (MTBE) (2) + B-U3000 (3)), ethanol (1) + MTBE (2) + B-U3000 (3)), (methanol ( I) + ethyl tert-butyl ether (ETBE) (2) + B-U3000 (3)), or (ethanol (1) + ETBE (2) + B-U3000 (3)), have been measured at = 298.15 K. The results are discussed in terms of the selectivity of alcohol (methanol or ethanol) and THE or ether (ETBE or MTBE) separation. Sloping of the tie-lines toward the B-U3000 vertex is observed for all mixtures. The results indicate an acceptable selectivity for the separation of methanol and THF and/or ether with the tested HBP utilizing solvent extraction. The nonrandom two-liquid (NRTL) model was successfully used to correlate the experimental tie-lines, with the maximum mean square deviation in mass fraction being 0.008.