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超临界流体可将化学反应的产物快速有效地移出反应体系，避免产物进一步发生副反应，并可提高反应速率或反应的转化率。在超临界流体介质中进行的化学反应，其反应速率可以大幅度提高。这些应用归因于超临界流体的特性，其中根本原因之一是超临界流体分子与溶质分子之间存在着超强相互作用，在宏观上这种作用表现为溶质具有绝对值很大的负的偏摩尔体积。
The supercritical fluid can quickly and effectively remove the chemical reaction product from the reaction system, avoid further side reactions of the product, and increase the reaction rate or the conversion rate of the reaction. In a supercritical fluid medium for chemical reactions, the reaction rate can be greatly improved. These applications are due to the properties of supercritical fluids. One of the fundamental reasons for this is that supercritical fluid molecules and solute molecules have superinteractive interactions, which macroscopically shows that the solute has a large negative value Partial molar volume.