The three phase separation due to contact between binodals was observed for the ternary system nitroethane(NE) + methylcyclohexane(MCH) + polystyrene(PS) with the molecular weight (M-w = 9.64 x 10(4) g/mol). A phase equilibrium experiment was made to determine binodals and three phase triangles on a composition triangle. With decreasing temperature a binodal spreads out from the MCH-PS side of a composition triangle at 48.4 degrees C and reaches the NE-MCH side at 23.6 degrees C. Another binodal spreads out from the NE-PS side at 43.6 degrees C and makes contact with the binodal running between the MCH-PS and NE-MCH sides at 3.3 degrees C. Simultaneously with the contact the three phase separation appears. The contact occurs at the critical point of the former binodal and at a noncritical point of the latter. The three phase separation usually occurs due to projection of a new binodal from the two phase region. (C) 2016 Elsevier Ltd. All rights reserved.