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achem500
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[*] posted on 24-7-2012 at 21:31
Drying agent

Hey guys,

I had a question about what drying agent to use, and also what kind of setup (plastic bag, dessicator, etc). The two drying agents that I would favor are magnesium sulfate or sodium hydroxide. Also, what are some alternatives to a dessicator?

Thanks.
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zoombafu
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[*] posted on 24-7-2012 at 21:56


Use magnesium sulphate (Epsom Salt) or calcium chloride (Damp Rid). As far as a desiccator all you need is a container that you can seal both your desiccant and your sample to be dried in. I Use Mason Jars and put my desiccant on the bottom and I have a little rack that I built to put the sample on. For a larger scale i put a jar of desiccant and a jar of the sample in a tupperware container.



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bahamuth
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[*] posted on 25-7-2012 at 00:11


For a general desiccator for removing water I would use silica gel as it has a much much lower vapor pressure at room temp than either mentioned previous in this thread. Easy to regenerate too.


Also it depends what you want to remove/dry, HCl/CaCl mix for acids, like removing acetic acid/water or HCl/water from a compound, or if you need a volatile base removed or extreme low water content, drying over concentrated sulfuric acid works well.


Additionally this is covered in multiple threads....



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Panache
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[*] posted on 25-7-2012 at 03:05


if you have access to or know anyone with a pottery kiln simply drying out some marble chips (nursery garden store etc) to quicklime makes for a cheap and convenient drying ageny



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achem500
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[*] posted on 25-7-2012 at 09:26


Thanks a bunch!
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