A survey of reported compositions along the saturation curve (sat), and compositions of coexisting phases in equilibrium (eq.) for the system 2-methyl-2-propanol-benzene-water is given in Table 69.

Saturation curve The ternary system 2-methyl-2-propanol-benzene-water forms a miscibility gap of type 1. Only one binary system benzene-water forms a miscibility gap. These binary data were compiled and critically evaluated in a previously published SDS volume, Ref. 3. The recommended values of mutual solubility at 298 K are x'₂=0.9970, x"₂=0.000 409. The mutual solubility of benzene and water was also reported by Simonsen and Washburn,¹ (x'₂=0.9970, x"₂=0.0003); these are consistent with the recommended values. Letcher et al.² reported data only in graphical form. Therefore these data are not compiled. The plait point estimated by Letcher and Siswana⁴ was x₁=0.16 and x₂=0.02, while the maximum alcohol concentration on the binodal curve is x₁=0.41. This point is consistent with the results of Simonsen and Washburn measurements, x₁=0.38.¹ The experimental tie lines at 298.2 K¹ are presented in Fig. 36 together with the experimental points along the saturation curve.