Post 347622 (https://www.thevespiary.org/talk/index.php?topic=8913.msg34762200#msg34762200)
(Nemo_Tenetur: "Batch size is also important", Methods Discourse):IMHO, the batch size is also an important factor. If you want to distill a huge quantity ketone you need up to hours heating. It seems logical that hours heating produces more tar than a few minutes heating for a small-scale batch. I've distilled MDP2B with a somewhat higher boiling point than MDP2P in a small scale (less than 50 ml) with a water pump without problems. On the other hand, a kilo-batch 4-methoxy-APP was destroyed under membrane pump conditions, whereas this compound can be distilled even with a water pump in a small scale without problems.
Makes sense to me, but its hard to argue with hands on experience. Plus AB has a good reputation on the Hive, so while it doesn't completely rule out other factors I'm for the most part conviced lab technique would not be a factor. I'd actually like to hear AB's opinion on this subject and why smaller batches were polymerizing ...I've heard that smaller batches need to be done in smaller flasks - I think that gets back to the whole surface area concept. Well, anyways, I should have a report soon from the vivid dreamworld in swinl's head. Either way, the vac. should be sufficient now.
I've been dying to read some replies, so input is definitely welcome. I wish I knew more about the qualitative effects. What I've read so far still leaves me curious. For instance, is it more of a trip or a roll. If it ever hit the black market, would it be called X, or would a distinction be made because of the qualitative effects being discernable from X? We'll see with a little luck and a smile from the ring-substituted-amphetamine-gods ...Peace out.