mew wrote:
heat will destroy acetic acid, so do not use heat as fb mescaline is an oil and is mostly undesireable
Acetic acids boiling point = 118C or so, well above boiling, boiling will not destroy acetic acid
the ignition temperature of it is listed on the MSDS as 426 C
http://en.wikipedia.org/wiki/Acetic_acid_(data_page)
the critical point is listed as 320 °C, so it is stable to at least 320C, which is just over 600* F... it is a common myth that it is not heat stable, but the data is pretty clear.
As to low yields, what is the source or type of the material being extracted?
That may be the reason for the low yield.