Freeze prep at -70oC?

[Methtical]

Hi,

Supposing one was to freeze precipitate their spice out of naptha using a freezer set at -70oC, would one expect to have complete fallout of spice crystals in a very short amount of time, or would it still be an overnight kind of thing given that it takes time for the crystals to form irregardless of how fast the spice falls out of the solvent?

Thanks,

Methtical

 

[benzyme]

:lol:

naptha will likely be frozen at that temp

 

[Methtical]

Darn it

Methtical

 

[Nordic]

In my experience best results appear when I gradualy cool down the naphta, I think one is aiming for about -20C.

 

[soulfood]

In my experience best results appear when I gradualy cool down the naphta, I think one is aiming for about -20C.

Me too.

Don't forget if something forms quickly in a solution containing other impurities then those impurities will become trapped in the structure of the crystal, whereas if the crystals form slowly this is less likely to happen.

 

[digglover]

Dry ice freeze precipitation?

Dry ice for freezing - FAQ - All your basic questions and answers - Welcome to the DMT-Nexus

SWIMs actually going to try this today. SWIMs trying to figure out a good way to keep my jars at a temperature around -30. SWIMs going to try lots of insulation over the dry ice and possibly a xylene/dry ice bath.

SWIMs other option was a salt/ice bath that could get around -20.

I'll post SWIMs results if SWIM gets anything good.