Santaonacid:
Anyone who already has trouble sourcing useful naphtha should perhaps not yet consider produce limonene by extracting it themselves. Also mind that you cannot freeze precipitate dmt from limonene nor is it practical to evaporate the limonene off.
Methanol is
not a nonpolar solvent, it readily mixes with water in any proportion, so it is not a substitute for naphtha. Really, stick to the time tested and proven teks before trying any variations, especially if you do not understand the mechanisms and techniques very well. Make sure that you thoroughly understand a tek before inventing variations or short cuts.
Light naphtha is also sold as
"white gas". The lightest (liquid at stp) naphtha fraction is called
"petroleum ether".
zknarc:
When using the technique of freeze precipitation, you need not evaporate very much solvent, only the tiny bits that still wet the filtered product crystals, so this would be quite doable even with white spirit. In fact fully evaporating all solvent is a bad idea, because you get a much more impure product as the end result, containing possible nonvolatile impurities from the solvent as well as other impurities stemming from the plant matter and other parts of the extraction process.
Alternative procedures, especially useful when a heavy naphtha solvent is not saturated enough for efficient freeze precipitation, are:
1. - FASA or FASI (search the wiki for details);
2. - backwash the solvent into a smaller volume of acidic water (eg. vinegar). This can then be processed in multiple ways, like:
.2 a. - basing and extracting with a smaller amount of solvent such that it can be freeze precipitated;
.2 b. - evaporating to nearly dryness and mixing with sodium carbonate, further drying and the extracting with alcohol.
I'm sure that there are many more options that have been explored and reported here on the forum. Look around a bit. Really, try to learn a bit before asking questions that have been answered here so many times before.
