Reflecting on Noman's tek he states that, ""Add that using heat for the last pull will increase yield. I left that out of the original for the sake of simplicity, but it probably should be mentioned."

By inference then, wouldn't heated solvent increase the yield of all preceding pulls?

Is there a reason why one would not use heated solvent for all pulls? (a heated pull would also evaporate more quickly for those that do an evaporation before freeze precip).

Does anyone out there use heated pulls for a STB extraction? If so, how hot do you go? I've heard anecdotally of people heating the entire aqueous mixture after adding the naptha.

Your thoughts generally about the use of heat to increase yield and/or the efficiency effect?

Thank you in advance.

I use STB and heat the whole mixture (including naptha) up to 60˚C, shake the everliving hell out of it and then place it back in the 60˚C water bath because it seems to aid in the layers separating more quickly and completely. I do 4 pulls on each batch this exact same way.

there doesn't seem to be much need to heat the jugs considering how hot they remain from the sodium hydroxide. gently heating the solvent does seems to increase yield while also pulling more impurities. not sure why one would only heat the solvent for the last pull. letting your can of solvent sit in a hot water bath seems to do the trick without directly heating a pan of solvent, which might be dangerous.