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active charcoal adsorbs ketamine?

M

madcow2

Greenlighter
Joined
Nov 17, 2009
Messages
13
Swim has some yellow color ketamine, when dissolved in water, make yellow solution, swim wants to use active charcoal to decolorize, and purify,

wonder whether the active carbon will adsorb much the ketamine HCL salt during decolorization and purifications?

Active carbon does not adsorb Salt, but how about Ketamine HCL ? Is it ionic or non-ionic?

Thanks
 
depending on the pore size of your active carbon, it may exclude organic compounds (pores too small) or absorb them very well.
 
how about the very fine powder of active carbon? Swim not knowing the size of pores.
 
Hard question, you see active charcoal is like a maze with a huge surface and all kinds of pockets and cul-de-sacs, some types are better suited for large molecules and others for smaller. Activated carbon does not bind well to certain chemicals, including alcohols, glycols, ammonia, strong acids and bases, but ketamine is not one of those.
It would depend on the molasses number but afaik it should be adsorbed.

Salt is composed of inorganic ions, there is not really any Van Der Waals force nor size to keep it stuck. Ketamine is an organic molecule, non-ionic because it is held together by covalent bonds. The fact that its the HCl salt is not really relevant.
What you mean is that table salt does not work (i.e. NaCl), but there are tons of other - also organic - salts and many of them
can be adsorbed. Table salt is often confused with salts in general.
 
Thanks. Any difference of yeilds between using gravity filter or vaccum distilled of active carbon used?
seems gravity filter is better but very slow.
 
Who knows? How did you come up with the idea that gravity filter carbon is better?
Just asking... actually I do agree, I would expect carbon meant for vacuum distillation to filter 'too well' making you either lose more ketamine or clog up the carbon faster disabling the action. But this is just guesswork. See if you can find a molasses number... the higher the better for your case.
 
Decolorizing carbon is assumed to absorb the chemical you want along with colored impurities, so the general rule is to use only a little of it, a pinch, so that the amount of the desired component you lose will be minimal. Colored substances tend to bind to carbon better anyway because of the attraction between double bonds.

If this doesn't work well enough, swim might want to consider acid-base extraction or recrystallization, or even just rinsing with something that shouldn't dissolve ketamine hydrochloride, like petroleum distillates.
 
After decolozied by charcoal, obtained clear brown/ Yellowish solution. Then performed acid/ base extraction , Strange though, clear yellow soluton turned Green; more alkali darker green solution. Green Paricipated colleced by fitration, done second time acid/ base extraction, this time, participate was in Brown color instead Green. The brown participate dissolved in HCl soluion, upon evaporation, yellow HCl salt was formed, washed with Acetone ...become very fine off-yellow powder instead of salt. This method was too complicated to decolozied Ketamine to form Salt. Yield was low , maybe due to acetone wash.
 
Definitely due to the acetone wash; ketamine dissolves in acetone. You'd have been better off dissolving it straight up in acetone and then filtering & evapourating.
 
but thought ketamine Hcl salt Not dissolve in cold ( room temperatue) acetone though. maybe only dissolved in high temp acetone.
 
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