How many times can you reuse Heptane or Naptha

[Guest]

E.g, after a STB, then freeze precipitated,
how many cycles can the heptane or naptha you use be utilised again without excessive loss of yield or quality.

 

[Infundibulum]

SWIM's FOAF reuses solvents around 8-10 times each time before evapping them out. Not really losses of yield that way.

 

[ChemEng]

My instinct is that whatever remains in the naphtha after a freeze-precip will likely be staying in the naphtha no matter what. Reusing several times should not be a problem.

 

[DarkShaman]

Until it's gone.