i usually check by the color of the alcohol, but from my rough estimate it is around 30 or 40 secs to minute per wash(cannabinoids are dissolved like sugar in water)...just as you do with naphta. i separate the washes in three jars or glasses just to be on the safe side.
the first two washes are usually quite yellow in color, than depends on the amount of cannabinoids and the temperature of the alcohol the third or the fourth wash start to pull some impurities (again judging by the green color the alcohol is starting to get),though in my experience this does not affect the consistency of the product or the potency for that matter.

Limonene does not evaporate cleanly and the residue is harsh to smoke. Using it as a primary solvent here is a no-go.

Although this may not be an issue for edibles.

thats about what i figured.
the test extraction is evapping now.

Though nothing to do with a limo extraction, this is the best info I could find on a CBD THC extraction. Sounds like it would be worth the effort.Hemp Husbandry

good read ! thanx alot man !

Has anybody any new info or opinions on this subject? I was glad to find a thread on the nexus covering it but hoped it'd be more informative. Seems Parsh possibly wasn't successful, and he's been inactive for a while it seems, still gonna message him though

I saw limonene distillation for cannabis extraction looks good. That's what I would do if I were to use limonene for cannabis extraction. Apart from that, CO2 extraction seems like the best of all of them ( but machinery is too pricey unless you do it as a actual job ).

That was one procedure I read about, using limonene to refine butane or ethanol extractions if I understand correctly, to create a nearly pure cannabinoid profile with only a few terpenes left over. It seems limonene pulls less chlorophyll than ethanol, and I see limo as potentially cleaner than say, naphtha or butane extraction, in terms of residual solvent in the final product, especially without a vacuum oven, though I think purging would be good for all extraction processes.
I found this thread; http://fuckcombustion.co...ene-and-extracting.6392/
and the member's procedure was as follows, copy+pasted;

1. Put bud in jar, add solvent and shake for 1-2 min
2. aspirate solvent and dry under dehumidifier
3. decarboxylate hashoil in oven @250F for 1-1.5 hrs
4. scrape and smoke!

Limonene seems to be useful for cleanup jobs, I believe it's commercially used for this task by some, refining crude extraction products.
However after reading and digging more I've found it may also be solely used for extraction, to good effect.
Horatio Delbert Concentrates markets 'LHO' as a simpson oil alternative, with petroleum free processing as the main advertising point ... and the results look beautiful!

http://11258-presscdn-0-...27898805_637107042_o.jpg

Just some on-the-fly thoughts here -

Regarding limonene cleanup, it should purge out of the solids with steam more quickly (easily?) than waiting for it to evaporate.

Limonene does oxidise, albeit quite slowly, so air evaporation is disadvantageous as the oxidation products can contribute weird gunk and cause slight degradation of the actives (in my thought experiments!) Otherwise it seems limonene is pretty good!