Purifying Heptane-Creative Problem Solving

You design a chemical process that uses n-heptane, CH3(CH2)5CH3, as a solvent. 

The n-heptane must be 99.999% pure when it enters your process. During the process the n-heptane acquires an impurity 10% /-propanol, or isopropyl alcohol, CH3CH(0H)CH3. 

Of course, we should recycle n-heptane. But first we must purify the n-heptane. Our challenge is thus  

Note that this simple statement of the problem carries subtle meaning. Compare to Separate /-propanol and n-heptane, which implies we wish to produce high purity n-heptane and high purity / -propanol. We only wish to produce a stream of high purity n-heptane we do not care if the /-propanol is impure. 

As we did several times in our design of the ammonia process, we investigate the possibility of separating the n-heptane by phase differences. We begin with the most efficient separation, gas/liquid or gas/solid, for which we need to know boiling points. Again we make a table of the relevant thermodynamic data. 

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