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constant. It is assumed that the feed stage is a fixed ratio of the total number of stages. The results, given in Table 3.2, show that the minimum reflux ratio is about 2.9.

3.7.3 Minimum Number of Trays

The simulation can also be run to find the minimum number of trays by decreasing the number of stages until the required reflux ratio becomes very large. Product purities are held constant. It is assumed that the feed stage is a fixed ratio of the total number of stages. Results are given in Table 3.3 and show that the minimum number of stages is 15.

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