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HWAHAK KONGHAK,
Vol.32, No.3, 425-430, 1994
Vol.32, No.3, 425-430, 1994
초임계 이산화탄소에서 Methoxyphenylacetic Acid 이성체 혼합물의 용해도 특성
Characteristics of Solid Solubilities of Methoxyphenylacetic Acid Isomer Mixture in Supercritical Carbon Dioxide
미량시료채취법을 적용한 연속흐름식의 초임계유체 추출실험장치를 구성하고, 실험대상 물질로 methoxyphen-ylacetic acid(MPA) 이성체를 택하여 온도 308.2K, 압력 11-34MPa하에서 초임계 이산화탄소와 o-/m-MPA, o-/p-MPA 삼성분계 평형용해도를 측정하였다. 삼성분계에서 각각의 용해도는 이성분계에 비해 상승되었으며, 또한 용해도 상승인자는 이산화탄소의 밀도가 증가함에 따라 증가함을 보였다. 용해도상승의 정도는 다른 고체의 이성분계 용해도에 비레하여 증가하는 경향을 보였지만 선택도는 이성분계에 비해 감소됨을 보여 주었다. 용해도 상승인자를 이산화탄소의 밀도에 대한 관계식으로 나타내었으며, 이것을 실험값과 비교한 결과 좋은 상관관계를 보여 주었다.
A supercritical fluid extraction system which employed microsampling technique and flow type was built and solubility data for mixture of o-methoxyphenylacetic acid(MPA) with m-, p-MPA in supercritical carbon dioxide were obtained at 308.2K, over a pressure range 11 to 34 MPa. The ternary solubility was higher than that of binary system, and solubility enhancement factor was increased with density, and a solubility of a given solid in the ternary system was increased relative to that in the binary system in proportion to the solubility of the other solid in carbon dioxide. But selectivity in ternary system became lower than that in binary system. The solubility enhancement factor was expressed as a function of the density of pure carbon dioxide, and a good linear relationship was observed for this system.
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