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Author: Subject: Bubbling dry HCl gas through a extract
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[*] posted on 15-1-2020 at 10:55


In PIHKAL, etherial solutions of alkaloids are often made into HCl salts by diluting with DRY ethanol (10:1 or so usually) and then adding the calculated amount of concentrated HCl.

This saves the need for a HCl generator set-up, and makes it possible to use the calculated amount of acid without a large excess, but does call for lots of dry ethanol.

I use sulfuric acid dripped on salt wetted with conc HCl when I need HCl gas.
The gas rises through a condenser (Ice water) packed with broken glass, or glass coils if I'm feeling fancy, then by tubing into an Erlenmeyer with a lot of drying agent in there.

Works well enough for most things.




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