I’ve only been in the industry for a few months, but seem to be having some decent results running SPD…
Temps vary based on vacuum. But in general, you probably want to take a look at BreakingDabs Distillation Tek
I have never used @anon42519203 info as an actual SOP (although I’m sure following it to the letter would get you some pretty decent quality dist), but more of a guideline to see where I’m at. I’ve run close to 20 actual distillations, each slightly different from the last as I continue to hone in my processes.
The “standard” amount depends on your glassware. For ease of understanding when beginning, I’d stick to the general rule of 1/2 the volume of your boiling flask. If you have a 2L flask, put 1L of crude in. Depending on many variables, I tend to get about 55% of my weight back from crude as mid- 80% to low 90% THC, high 90% total cannabinoid content.
The difference between first pass and second pass is just another level of purification. If your parameters cannot be improved in any way, there is probably no need to run a second pass. For example, if your vacuum pump is unable to get your vacuum down to double digit microns, you are probably better off not running a second pass. You will probably just be converting a lot of CBN instead of pulling a tighter, cleaner body.