Hey guys,
Some good stuff in this thread. I love the way the absolute product looks.
I have one quick question. Do you think there is any significant difference between using ethanol for the "secondary extraction" and filtering verse using isopropyl alcohol?
I did my BHO tube style extraction directly into a container with a small amount of Iso covering the bottom to help with purging of the butane at ~ 85deg F (29) for about an hour. I then filter the iso through activated charcoal and a coffee filter. This liquid then is evaporated at 85F for 24 hours until all the iso is gone.
Now i am thinking of doing dissolution into ethanol and freezing for 24hrs then doing another filter and evap.
But if we think the iso works just as well then ill stick with that. It is much cheaper then 180 proof ethanol.
Butaflor is a registered name (P Robertet & Cie) given to a series of highly concentrated perfume materials produced by extraction with butane at subnormal temperatures. The solvent is recovered be evaporation at room temperature (boiling point of butane is -0°.50C). The low extraction temperature and the selected solvent result in a pale-coloured, almost wax free and terpenless product. The method is particularily useful and advantageous when applied to very delicate or heat sensitive botanical materials, e.g. lilac flowers. jasmin, rose, lily of the valley (muguet), orange flowers etc. Certain staple materials are also treated in this method, e.g. ginger rhizomes. It should be kept in mind that not all Butaflors are completely alcohol solvent.
Waxes, fats, oils work as a softener. Water evaporates together with ethanol from azeotrope solution.What gives the oil a malleable consistency? Is this due to water left behind from the alcohol?
I suppose this would be done after final evaporating as an additional process.If one wanted to create a decarboxilated absolute, at what point in the process would this be done? I assume after the etoh wash and filter? Also how would one heat the solution so a minimum of the terpenes and cannabinoids are lost in the process.
It seems impossible to keep terpenes after decarboxylation, it requires the temperature much higher then many terpenes may withstand.ethanol is evaporated at 78C (173F) on double boiler,
they say this temperature is not safe to terpens, many of them fly away others oxidize into another forms,
vacuum would help to save virgin terpenes in evaporation under 50C (122F),
on the other hand in terms of THC content its better 20-30 minutes at 122C (252F).
Gunna,
My concern is that with low extraction temps less terpenes are extracted - terpenes are essential to the effect of the product. Is another wash of the source material needed, with another solvent, to pick up the terpenes?
-The glass amber can be extracted only from uncured flowers with a high content of THCA and low THC. [/COLOR][/SIZE][/FONT]