[Caveat: I've never worked with chaliponga resin but these are some thoughts based on other experience.]
Vinegar has the advantage of being volatile, also it has far less of an emulsifying action than citric acid. It may be unnecessary to add any acid to the resin as it has already been extracted into water and the alkaloids will be in salt form anyhow. Test the pH of your resin if you can.
Quote:simply add the Sodium to the solution?
Presumably you're not actually intending to add metallic sodium to the acidic solution. If you are, don't!
If you mean sodium carbonate, abbreviating it to 'sodium' is not really acceptable. Calling 'carbonate', for example, is better. Nomenclature can be a matter of life or death in chemistry.
Adding sodium carbonate to an acidic solution will produce A LOT of fizzing. This is one of the reasons it's preferred to mix it with solid material and then add water to form a paste. This suggests to me that for the defat you might be better off adding only a small amount of water to your resin to make a paste. This paste could then be kneaded under naphtha a couple of times (use a fork; fresh naphtha each time) and flattened out afterwards for the remaining naphtha to evaporate.
You would then add the sodium carbonate and a little water. Mix thoroughly. Let it dry, then pull with ethanol, isopropanol or acetone. Evaporate solvent to recover freebase goo. For crystals, dissolve goo in the minimum amount of warm naphtha and freeze precipitate. In principle, if you pull from the carbonate paste with warm naphtha to start with, that could go straight to freeze precipitation. However, yield recovery will be better with a more effective solvent for the carbonate pulls.
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