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超临界流体萃取分馏仪依据溶剂在超临界态下特有的反常冷凝原理设计而成 ,结合了萃取和分馏两大过程的特点。采用超临界丙烷、丁烷、戊烷作溶剂 ,分离过程完全由计算机控制 ,原料在萃取釜中由超临界流体萃取 ,分馏柱的温差作用产生的内回流可有效地改善分离选择性。线性升压程序使超临界流体的溶解能力由小到大 ,从而使重质油的馏分按分子量和极性大小顺序流出。超临界流体萃取分馏仪对高沸点物质的分离特别有效 ,可分离物质的常压当量沸点可达 10 0 0℃以上 ,已在石油重质油、润滑油、石蜡和地蜡、催化油浆、聚合物以及多种天然产物精密分离方面得到了广泛应用。
The supercritical fluid extraction fractionator is based on the unusual condensation principle of the solvent in the supercritical state, which combines the characteristics of the two processes of extraction and fractionation. Using supercritical propane, butane and pentane as solvents, the separation process is completely controlled by computer. The raw materials are extracted by supercritical fluid in the extraction kettle. The internal reflux generated by the temperature difference of fractional distillation column can effectively improve the separation selectivity. The linear step-up procedure minimizes the ability of supercritical fluids to dissolve, allowing heavy oil fractions to flow out in the order of molecular weight and polarity. The supercritical fluid extraction fractionator is particularly effective for the separation of high-boiling substances. The atmospheric equivalent boiling point of the separable substances can reach over 100 ° C. It has been widely used in petroleum heavy oil, lubricating oil, paraffin and wax, catalytic slurry, Polymers and a variety of natural products have been widely used in precision separation.