A flash drum operating at 300 kPa is separating a mixture that is fed in as 40 mole% isobutane, 25% n-pentane and 35% n-hexane. We wish a 90% recovery of n-hexane in the liquid (90% of the n-hexane in the feed exits in the liquid product). F= 1000 kg-mole/hr. Find Tdrum, V/F, and the composition of both streams

Antoine equation parameters: logsat = /(+), where T is in K and sat is in bar.

Antoines Equation Values

A B C isobutane - 4.3281 1132.108 0.918 pentane - 3.9892 1070.617 -40.454 hexane - 4.00266 1171.53 -48.784