Method and apparatus for determining boiling points of liquids

Thermal measuring and testing – Transformation point determination – Between gaseous and liquid states

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374 16, G01K 1700

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044848226

ABSTRACT:
A liquid sample is placed in a closed vessel. A thermocouple junction is submerged in the liquid sample. The pressure of the liquid is decreased, or the thermocouple junction is heated, until boiling from the thermocouple junction is detected. The pressure or temperature is then varied until the boiling just ceases. The pressure and temperature at cessation of boiling define the boiling point free of spurious liquid superheating effects.

REFERENCES:
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patent: 3446056 (1969-05-01), Koch
patent: 3690177 (1972-09-01), Fluegel
patent: 3698236 (1972-10-01), Markey
patent: 3813925 (1974-06-01), Fenske et al.
patent: 3992229 (1976-11-01), Hall, Jr.
patent: 4250739 (1981-02-01), Audeh et al.
patent: 4348117 (1982-09-01), Michels
Andrews, D. H. and Kokes, R. J., Fundamental Chemistry, N.Y., John Wylie & Sons, 1963, pp. 296-297.
Moore, W. J., Physical Chemistry, Englewood Cliffs, N.J., Prentice Hall, 1962, p. 106
Cole, R., "Homogenous and Heterogenous Nucleation", In: Van Stralen, S. and Cole, R., Boiling Phenomena, N.Y., McGraw-Hill, 1979, vol. I, pp. 71-73.

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