The Vespiary
The Hive => Chemistry Discourse => Topic started by: Elementary on January 27, 2002, 02:45:00 AM
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I have heard that magnesium perchlorate is an extremely good drying agent, but I can't find any chemistry book references on ways of making it.
Is Mg(CLO4)2 made the same way as potassium perchlorate is made, by heating potassium chlorate ?
Anybody got any good text book synths for me while I'll plough though the patent office site ?
One day I'll understand everything !
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Couldn't you use ion exchange between MgSO4 and NaClO4?
NaX exchanges with lots of sulfates.
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would the sodium perchlorate not oxidise the Magnesium sulphate to a persulphate ?
Oh no that does not balance ! :P
Yes seems a great method ! :)
One day I'll understand everything !
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Is magnesium perchlorate a powerfull enough dehydrator to pull H2O's away from organic chemicals, like turning amide's into nitriles ?
One day I'll understand everything !
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Still going for acetamide --> acetonitrile? :)
I don't know on the MgClO4. What about phthalic anhydride?
PrimoPyro
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You can make P2O5 by heating a phosphate salt with sand (no carbon).
http://www.geocities.com/dritte123/PSPF.html
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How hot?
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No I'm not going for acetonitrile, I just used it as an example.
Just wanted to know just how powerfull a dehydrating agent magnesium perchlorate is.
One day I'll understand everything !
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>How hot?
Very hot. From what I can remember from reading about it, about the same temperatures as making phosphorus.
http://www.geocities.com/dritte123/PSPF.html
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Don't use magnesium perchlorate as a drying agent. Organic materials in contact with magnesium perchlorate will spontaneously combust. Magnesium perchlorate is used as a drying agent only in a special case - the absorption train of an elemental analysis rig.