Distillation isn't magic. It works because different materials have different boiling points. When it's salt and water it's really easy since the boiling points are totally different but when it's something like this we're talking about hundreds to thousands of possible compounds all in the same mixture (also, there might be different compounds each time because of the different materials), melted up together. I doubt it's purified.
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It looks like it distils the oil which would mean that it is purified. It also would mean that the machine needs to cleaned regularly.
Distillation isn't magic. It works because different materials have different boiling points. When it's salt and water it's really easy since the boiling points are totally different but when it's something like this we're talking about hundreds to thousands of possible compounds all in the same mixture (also, there might be different compounds each time because of the different materials), melted up together. I doubt it's purified.