This is from the Phoenix Tears web site - the FAQ about RSO, page - regarding the solvents Rick recommends:
WHAT KIND OF SOLVENTS SHOULD I USE?
There are also many other solvents which could probably be used to perform an extraction effectively such as acetone, but the only solvents that I have direct experience with are ether, naphtha and 99% isopropyl alcohol, therefore I do not feel qualified to tell the public what other solvents they can use.
The process I am about to describe, involves washing the starting material twice with a good solvent such as
pure light aliphatic naphtha or 99% isopropyl alcohol etc. To effectively remove the available resin, which contains the medicinal cannabinoids from the plant material.
Light naphtha has proven itself to be a very effective solvent to produce this oil and it is also quite cheap to purchase when compared to the cost of other solvents. This solvent is called light naphtha in Canada, and
in Europe it is often called benzin(e) and it is sold as cleaning fluid or solvent in many hardware stores.
In addition,
naphtha is usually quite easy to locate in many countries, while other pure solvents that are well suited to preform extractions, can be very expensive and hard to find. Naphtha comes in different forms and under many different names and the temperatures at which they boil can vary a great deal, which is something that must be taken into consideration if one is to obtain the proper solvent. The naphtha which I preferred to use had a boiling point around 70 degrees C, which is about the same amount of heat required to bring 99% isopropyl alcohol to its boiling point.
HE THEN GOES ON TO EXPLAIN
Any solvent that you intend to use should be colourless, the same as water and if you dip your finger into it, within about 40 seconds it should completely evaporate from your finger leaving no oily residue behind.
Naphtha is sold under many names but if you go to a fuel supplier, you should not have too much trouble tracking some down, if you tell the supplier that you are looking for a solvent which has a boiling point around 70 degrees C. Light naphtha has many industrial uses, and it is often used to degrease engine parts or thin paints etc., so I’m sure you should not have too much trouble finding what you need. Just to give you an idea of its many uses, naphtha is the same substance used to fuel Coleman lamps and stoves. Unfortunately, rust inhibitors are added to Coleman fuel, so I do not recommend that this fuel be used to produce oil. But as I understand it, some companies actually do supply camping fuel with no additives, so this should work very well as a solvent to perform an oil extraction.
There is also
medical-grade naphtha (hexane) available in many countries in the world, but it is a bit more expensive and usually harder to get and I have not found any significant difference, between pure light naphtha and the medical grade version of this solvent.
Butane can also produce oil, but I do not recommend its use as a solvent to produce this medication, since it is very volatile and would require the use of expensive equipment to neutralise the danger.
In addition, using butane to perform an extraction does not decarboxylate the finished oil, because there is little or no heat used in this process. So oils produced in this manner would be less effective for medicinal use, unless the extra time is taken to decarboxylate the oil properly.
And THEN ON THE TOPIC OF EVERCLEAR - (This certainly answers my opening question)
WHAT IS YOUR OPINION ON THE USE OF LESS EFFECTIVE SOLVENTS, SUCH AS EVERCLEAR?
Many people in the US and some other countries as well, are finding it quite hard to locate the pure solvents, which I recommend and some have turned to the use of substances such as everclear, which in its purest form is about 95% alcohol, but usually you will find that the remaining 5% is water.
This makes everclear a less effective solvent due to its water content and at the end of the oil making process there will be quite a bit of water, which will have to be evaporated off before the oil is in a finished state. So
if need be substances such as everclear can be used, but I much prefer to use the pure solvents that I have described. Many people have contacted me to ask if they could use such things as
151 proof alcohol as a solvent.
But in my opinion trash such as this is not even fit for human consumption and I would never even think about using such a substance to produce the oil.
(Crow comments - not that Naptha is ever fit for human consumption either.
The point is, that there are much better solvents than EC but EC is better than just any old high proof alcohol.)
Thank you very much to starramus for the excellent link!!!!
Stay safe and healthy.
Crow