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How to properly use desiccant?

BP Dry Storage

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#1 Ionforbes

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Posted 11 October 2020 - 12:48 PM

I keep my BP in a sealed container, but I was thinking about using a desiccant just to make sure things are dry as a bone. At the moment I use anhydrous copper sulphate in an open ziploc bag in the same container but without actually mixing with the BP. Would this actually help at all? I don't see any reason why moisture would necessarily hydrate the copper sulphate rather than absorb in the BP aswell.

Thanks



#2 SignalKanboom

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Posted 11 October 2020 - 12:51 PM

Crazy, Im having serious clumping issues inside my mill jar. I loose over 8 percent of what I mill and have to wash the jar out and start over after trying to dry it as best I can. I will definitely be reading this. Good luck, Im sorry I cant be of help.

#3 SharkWhisperer

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Posted 11 October 2020 - 01:07 PM

I keep my BP in a sealed container, but I was thinking about using a desiccant just to make sure things are dry as a bone. At the moment I use anhydrous copper sulphate in an open ziploc bag in the same container but without actually mixing with the BP. Would this actually help at all? I don't see any reason why moisture would necessarily hydrate the copper sulphate rather than absorb in the BP aswell.

Thanks

Because copper sulfate (if cooked to anhydrous) has a much greater affinity for water than charcoal, your primary hygroscopic component in BP, so water is selectively drawn to it. If your copper sulfate is blue, it is already water-bound and will work like shit as a dessicant. I use widely available silica dessicant packets (many sizes to choose from--they look like small pillows made of teabag material) that contain color-changing beads. When indicator beads go from orange to green, they're full of water and go into the oven for a half hour to be recycled--good as new and will last essentially forever. Be sure to blow off any BP that may have attached to packet so it doesn't burn in oven, though unlikely. Reasonably priced. Other dessicant's available. All my hygroscopic chems get dessicant--charcoal for sure (the stuff in use, post-oven drying), same with milled KNO3 and coffee-grinder ground strontium nitrate crystals. No clumping problems. Ever. Simples.


Edited by SharkWhisperer, 11 October 2020 - 01:08 PM.


#4 Ionforbes

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Posted 11 October 2020 - 01:20 PM

Ah that makes sense, thanks. Another question, does desiccant actively draw moisture out of already moist charcoal? Others in the household aren't keen on baking charcoal in the same oven they make food in.



#5 SharkWhisperer

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Posted 11 October 2020 - 01:30 PM

Charcoal can absorb up to 20% of it's weight in water. Apart from throwing your comp ratios waaay off, there's your clumping issues. It would take a lot of passive dessication to get charcoal bone-dry  like you want it. Possible? Maybe. Never bothered trying. No reason to. There is essentially zero hazard of cooking powdered or chunk charcoal in the oven inside. It already has the majority of volatiles burned off, will not release toxic gasses, and won't start on fire at oven temps. It's the same charcoal you set on fire and cook steaks and burger over, directly over, ffs...  Your housemates must not enjoy  a good grill session, then, tsk tsk. It's harmless. The stuff doesn't ignite and it doesn't magically blow around in a dust cloud and contaminate everything.  Sheesh, buy a cheap used toaster oven just for drying comps if that's the concern. Really though, there is no concern.



#6 Ionforbes

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Posted 11 October 2020 - 03:50 PM

Believe me I tried to tell them, there's just no convincing some people. Better to just fork out for the toaster oven I guess...







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