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HWAHAK KONGHAK,
Vol.31, No.2, 160-168, 1993
Vol.31, No.2, 160-168, 1993
비단열 관결정화기를 이용하여 Benzene-Cyclohexane계 분리
Separation of Benzene-Cyclohexane Mixtures by Nonadiabatic Column Crystallizer
Bench규모의 비단열 관결정화 공정을 이용하여 benzene-cyclohexane계를 분리하였다. 관결정화기의 정제부의 농도분포 및 온도분포를 측정하여 단열계와 비단열계의 정제도의 비교, 냉각부의 거동특성, 초기농도의 영향, 정제부의 성능 등을 고찰하였다. 단순공용 이성분계의 분리실험을 통하여 얻어진 비단열계의 정제부성능은 기보고된 Schilknecht형의 단열계 정제부의 성능과 비교되었다. 비단열 관결정화기에서의 역혼합은 단열계의 1/20정도였다. Bench규모의 비단열 관결정화에 의하여 benzene속에 함유된 30000-70000ppm cyclohexane을 100ppm 이하로 정제할 수 있었다.
The eutectic mixture of benzene-cyclohexane was separated by the nonadiabatic column crystalli-zation process of bench scale. Experimental determinations were made of temperature and concentration profi-les established during the purification of benzene with cyclohexane as impurity under steady state, batch conditions of operation. The comparison of the performance of purification in the nonadiabatic column crystalli-zer with that in the adiabatic column crystallizer, phenomena of the freezing zone and the effect of initial concentration were discussed. The back mixing of the purification zone in the nonadiabatic column crystallizer was a twentieth times of that in adiabatic column crystallizer. Benzene containing below 100ppm cyclohexane was obtained by processing feed material with 30000 to 70000ppm cyclohexane.
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