05-06-04 02:50
No 505258
SWIM had a minor thought when looking at HCL gas generator plans. Assuming CaCl will not interfere with a reaction, and AFAIK no (or extremely little) pressure is created when generating HCL gas, could one just place CaCl into a bottle with the chemical to be gassed, and then drop in aqeous HCl by any means (funnel then quickly lidding, or safer, using a syringe and a port). The CaCl would eat any water to begin with which is good since HCL gassing is used in water-free situations. This keeps the rxn dry. The water from the aqueous HCl gets eaten by CaCl, leaving Hcl gas to come out of soln. The bottle is simply shaken.
Any thoughts? Don't flame me, there's probably a hundred good reasons why it wont work, but maybe someone can use this to model a safer way. SWIM just likes the idea of safely putting all reactants in one container and shaking rather than having ventilation.
Edit: In a dream SWIM's friend just attempted this with methyl ethyl ketone + benzaldehyde + cacl + aq. hcl in a bottle purely as a test, at 5C, shaken hard, settled to contain an oily layer. So unless the hcl reacted with the BA in an odd way, the 'safer' gassing way worked?
(Hive Bee)
05-06-04 05:33
No 505283
are you saying your putting the aq HCl + CaCl2 and (for example) dry toly + freebase in one container, shaking the crap out of it and hoping it works???
Ahhhh.... no....
the purpose of having the toly and freebase DRY is to allow crystals to form, for example MDMA freebase, soluble in np, not soluble in water, its an oil... but the HCl salt is soluble in water and not in np...
If you had toly and freebase in the same pot with drying agent, CaCl2 is not the best in this, Mg sulphate is better....
but if you add aq hcl to that you fuck up crystal formation... the freebase (in small yield) will turn to salt BUT will then dissolve in the water as the drying agent does not work that quick.
you need a high conc of acid to convert any type of yield and rate from freebase to salt, thats why the gas is used in most cases. and acid gas req to be dried before getting to toly for same reason as above.
Hope this answers you question.
-AC
(Newbee)
05-06-04 05:40
No 505286
Thx dude. Yeah it did clear up a few things for SWIM.
(The Archetypical "Good Guy")
05-06-04 06:44
No 505296
Also - How would you separate the crystals formed from the CaCl2?
Nuke the whales!
(Hive Bee)
05-09-04 06:17
No 505992
swim is pretty sure he remembers reading that cacl2 reacts with amines.
so no.
(Chief Bee)
05-10-04 05:55
No 506194
Yes, calcium chloride complexes with amines. UTFSE.
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