Why WFE/SPD? Part 4 of 5 Simple Distillation

The question arises: How do you know when wiped film distillation is the better option?

Should you wish to discuss a specific application, please message me, and we will set up a free call.

Reason four to consider wiped film distillation: Simple Distillation

So far in this series we have discussed reasons that wiped film stills are superior to traditional equipment.  In today’s post, we will discuss a case where they can be limited compared to traditional setups. 

Wiped film stills are a simple distillation device, meaning they consist of a single theoretical plate.  When used to perform separations, they are capable of purifying mixtures whose components are far apart from each other.  If the boiling points are too close, the still is not capable of producing pure components.  Instead, the best that can be achieved is enrichment in one component.

Therefore, wiped film stills are best suited to applications that don’t require fractionation.  Any applications where it is possible to strip out of a reactor or in a rotovap is a good fit for wiped film stills.  As a rough rule of thumb, if the boiling points of the components are closer than 50-60°C, a really clean separation is not likely when using a wiped film still. 

If your application calls for a simple distillation, then wiped film stills should be considered as an option.