I would strongly reccomend using chilled acetone if possible in any way whatsoever, it will benefit the crystallization (speed) massivly. For gassing you add 37% HCl via an addition funnel over H2SO4 inside an vacuumable Erlenmeyer with a tube attached to the erlenmeyer and dunked inside your product on the other end. Use a gas pipe please for you own sake, cheaper ones will work, but arent exactly optimal personal protection. You can additionally stirr the generator flask as well as heat it carefully, although Id say this is not necessary if you made sure all joints are tightly clamped, so suckback is kept minimal. If yield of HCl gas is low, try playing around with heating and stirrer to further lower the chance of suckbacks. Alternativly the following options could be suitable aswell:
- Dripping Muriatic acid over sulfuric acid, same procedure as above.
- Dripping H2SO4 over NaCl
- heat a NaCl/NaHSO4
(to achieve NaCl(s) + NaHSO4(s) + dT (around 270C) -> HCl(g) + Na2SO4(s)) -> this is for sure an inferior method as controlling the r release of gaseous HCl is nearly impossible, the yield is low and the Na2SO4 aka sodium sulphate clumps in the generator flask and is annoying as fuuuuck to remove, if you plan to get a reasonable amount of HCl(g) dont use this method.
if I remember correctly, back in the day there was a popular and equally insane and genius post on the hive on the production of HCl (g) using beer bottles and makeshift setup from home equipp and literal waste, so this could probably be considered the "poor mans" version of gassing your product
