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공비혼합물의 공비점에 대한 압력의 영향(저압)

Effect of Pressure on Azeotrope(Low Pressure)

임진남 이호태

Rhim JN Lee HT

HWAHAK KONGHAK, June 1986, 24(3), 179-184(6), NONE

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Abstract

Negative azeotrope를 형성하는 2성분의 chloroform용액계（acetone, 2-butanone, ethyl formate, methyl acetate, ethyl acetate, vinyl acetate）에 대하여 400 mmHg에서 800 mmHg까지 압력을 변화시켜가며 공비온도와 조성을 측정하였고, UNIFAC식을 이용하여 공비점을 계산하였다. 그 결과 측정값과 계산값이 비교적 잘 맞음을 알 수 있었다.
또한 낮은 압력범위에서는 ln T_az = A + B ln P의 관계를 가지며, 공비조성은 큰 변화가 없음을 알 수 있었다.

For the 6 binary systems of chloroform with acetone, 2-butanone, ethyl formate, methyl acetate, ethyl acetate, and vinyl acetate, we measured azeotropic temperatures and compositions at low pressure range （400 mmHg-800 mmHg）. And at each pressures, we calculated the azeotropic points by using UNIFAC equation. The azeotropic points obtained from experiment and calculation were comparatively identified.
By ploting pressure vs. azeotropic points, we could get an equation, ln T_az=A+B ln P, and azeotropic compositions changed linearly with pressures.

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