Hi!
To perform a solid/liquid extraction, just cover the solids to be xtracted in a flask, cover well with the solvent to be used and reflux (with condenser attached of course) for a few minutes (10-20min. should suffice, but it depends on the solvent/solubility of the desired compounds of course). After reflux, cool down and pour off/filter the solvent and
keep it. Repeat the reflux in solvent a few times (2-3 times) with fresh solvent, every time collecting the solvent. Then, combine the solvent portions, concentrate the combined portions (through distillation) and cool slowly to get crystals of the desired/extracted compound. All other solid substances stay in the flask/filter funnel..
The solvent should have the ability of dissolving the desired compound very good, but the undesired other things should ideally be insoluble in it.
In the case of methylamine and dimethylamine, there are two possible solvent groups: alcohols and halogenalkanes. The alcohols dissolve methylamine*HCl good to very well, and the halogenalkanes dissolve the dimethylamine*HCl very nicely and leave back the MeAM*HCl.
Let me repeat: to remove dimethylamine from methylamine, DCM/chloroform should be used, and to remove methylamines in general, they are extracted with alcohol. Hm, seems we aren't closer now than before..
Maybe you could use the
different solubilities of methylamine*HCl and dimethylamine*HCl in alcohol: with several careful recrystallizations, it should be possible to accomplish the separation of these two alt least partially. But I sadly dunno which of the two has higher solubility..
Concerning "UTFSE": I don't believe you - because I did promptly find the following
:
Post 488683
(Organikum: "For the vindication of Eleusis - Methylamine", Methods Discourse) (nice spicy discourse about the different aspects of methylamine production *lol*)
BTW when searching something, it doesn't suffice to browse through the hit list of a search engine - you also have to browse through the
texts behind the single links (and not only the first two lines - the whole text!), as the name of a thread/post usually doesn't give you a full overview about its contents...
What you're requesting is sometimes called "spoon-feeding" if I remember correctly
BTW I assume you meant drying alkylamine salts (dimethylamine hydrochloride for example) - this is indeed not easy without any help/equipment.. But can be accomplished by placing the wet salt in an open container and then placing this into a bigger container filled with dry CaCl2 (damp-rid or similar) 5-6cm from the bottom. Close the bigger container tightly and let sit for 3-4 days. After having spent this time in your "home-made dessicator", the diMeAm*HCl should be absolutely dry - but it is hygroscopic now! So open the big container, take out the smaller one and immediately screw lid on tightly. Voilà: dry diMeAm*HCl!
Greetz A