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07102Vapor pressure-temperature measurements have been observed for the following trialkyl borates: methyl, ethyl, propyl, isopropyl, butyl, and isobutyl. The data were fitted into the equation, logI,IPmm, = A / T + B l o g~T + C, and the constants A, 6, and C, evaluated from a least-squares calculation on the IBM 1620 computer, were employed for finding the normal boiling point, latent heat, and entropy of vaporization for each of the borates.

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Vapor-liquid equilibrium measurements at 101325 Pa are reported for the methyl borate-methyl alcohol-benzene system. Analysis of the results shows that the ternary system can be reasonably represented from binary data by the Wilson equations and slightly better by the Margules correlations. The ternary system Is made up of two mlnlmum-boHIng azeotropic systems and one Ideal binary system. No ternary azeotrope exists.

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