digglover said:
I believe you would just need to set up a distillation apparatus and distill it...I might have to do this someday if I keep using limonene.
Not quite; you have no reason to believe that distilling your limonene will remove any of the contaminants, right?
Which are the contaminants you're after to remove? Do they co-distil with limonene? Limonene has a high boiling point often other stuff co-distils with it.
Distillation of limo will definitely leave non-volatiles and high boiling point contaminants behind but not everything. Distillation is not a silver bullet to clean solvents!