Under the assumption of constant molar overflows and relative volatility, a simplified model is developed to study the behavior of the distillation process under consideration. 假定液体持液量和待分离的体系的相对挥发度均保持不变，建立了该塔的一个简化的模型，由此得到各组分在整个塔中的分布情况。
If one component changes another component's vapor pressure, or if the volatility of a component is dependent on its percentage in the mixture, the law will fail. 如果一种组分改变另一组分的蒸气压，或者说，一种组分的挥发度取决于它在混合物中的百分比，那么这一定律将归于失败。
