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Solubility of Triglycerides in Supercritical Carbon Dioxide.

机译：甘油三酸酯在超临界二氧化碳中的溶解度。

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The solubilities of four saturated, mono-acid triglycerides: Trilaurin, Trimyristin, Tripalmitin and Tristearin have been determined in supercritical Carbon Dioxide, at 35, 40, 47 and 55°C and at CO2 densities of 0.57, 0.66, 0.73, 0.78, 0.84 and 0.89 g.cm-3. These solubilities were reproducible to within 10% and agreed well with those of a previous worker, in the mid-to-high density range. The experimental data were correlated using several theoretical and empirical methods. Of the empirical methods, regression of the triglyceride solubility data against a linear function of temperature and density was found to give the least mean square deviation. When a suitable functional form was used for the binary interaction parameter, the Carnahan Starling modification to the van der Waals equation of state was the most satisfactory theoretical correlation tested. A new experimental apparatus to determine solubilities in supercritical fluids was designed and constructed. The design featured the particular advantage that a microsampling technique using direct coupling to an HPLC apparatus was used to take samples of the high pressure saturated CO2 stream. This obviated problems due to depressurisation of the outlet stream. Carbon dioxide was chosen to be the solvent for its low critical properties, low toxicity and ready availability. The triglycerides were selected as solutes for their relevance to the Dairy and Food Industries. During the course of this work literature references to solubility data since 1982 were compiled.
机译：已经在35、40、47和55°C和CO2密度分别为0.57、0.66、0.73、0.78、0.84的超临界二氧化碳中测定了四种饱和的单酸甘油三酸酯的溶解度：三月桂酸酯，曲霉菌素，Tripalmitin和Tristearin。和0.89g.cm-3。这些溶解度可重现至10％以内，并且与以前的工人在中高密度范围内相吻合。使用几种理论和经验方法对实验数据进行关联。在经验方法中，发现甘油三酸酯溶解度数据相对于温度和密度的线性函数的回归给出最小的均方差。当将合适的函数形式用作二元相互作用参数时，对范德华状态方程的Carnahan Starling修正是最令人满意的理论相关性测试。设计并构建了一种新的测定超临界流体溶解度的实验装置。该设计具有以下特殊优势：使用直接耦合至HPLC装置的微量采样技术可采集高压饱和CO2物流的样品。由于出口流的减压，这消除了问题。选择二氧化碳作为溶剂是因为它的关键特性低，毒性低且易于获得。选择甘油三酸酯作为溶质，因为它们与乳制品和食品工业相关。在该工作过程中，汇编了自1982年以来的溶解度数据参考文献。

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    Pearce David L.;

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  • 年度 1990
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