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提出了一种用正构烷烃切割实沸点（TBP）蒸馏曲线的新方法，即积分自动选择正构烷烃法（IAC法）。模拟计算的结果表明：该方法可以准确地预测减压蒸馏高沸点馏分的物性数据；由于把压力作为变量处理，进一步提高了模拟计算的准确程度。
A new method to cut the boiling point (TBP) distillation curve with n-paraffins is proposed, which is the integral automatic choice n-paraffin method (IAC method). The simulation results show that this method can accurately predict the physical properties of the high-boiling distillates by vacuum distillation. Because the pressure is treated as a variable, the accuracy of the simulation is further improved.