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Triflic Acid
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[*] posted on 11-5-2021 at 17:43
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I just distilled some pyradine, but the problem is that most of it came over as a 50% azeotrope. Any tips on how to separate it?



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DraconicAcid
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[*] posted on 11-5-2021 at 17:52


Sodium hydroxide is a good drying agent for pyridine.



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Triflic Acid
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[*] posted on 11-5-2021 at 19:53


Ok. Once I add that, do I have to redistill?



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[*] posted on 11-5-2021 at 21:51


Yes



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Fyndium
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[*] posted on 11-5-2021 at 22:59


I presume that upon addition, it will separate water into a layer similar to IPA that can be simply separated, and redistilled?
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[*] posted on 12-5-2021 at 07:41


Quote: Originally posted by Fyndium  
I presume that upon addition, it will separate water into a layer similar to IPA that can be simply separated, and redistilled?

I believe so. If it's 50% water, you'll probably have to dry it more than once before distilling.



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[*] posted on 12-5-2021 at 09:13


With this information, I would try to first cause layer separation with adding Conc NaOH solution, letting it sit for a while to clear out layers, drain the bottom layer, use MgSO4 or similar, filter and distill. Or why not just add NaOH granulates and distill it from those? Maybe it'll etch glass.
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