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Author: Subject: Sodium Ethyl Sulfate
JJay
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[*] posted on 15-1-2017 at 15:55


You can't use the common ion effect to eliminate sulfates with ethylsulfate ions.



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[*] posted on 15-1-2017 at 17:37


Why not? Regardless, that's reported to work, I'm not just assuming that it does.

[Edited on 16-1-2017 by alking]
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JJay
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[*] posted on 15-1-2017 at 18:13


Where is that reported? I think you're confused.

You can't even use the common ion effect to crash out bisulfate with sulfate. They are different ions.

[Edited on 16-1-2017 by JJay]




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[*] posted on 15-1-2017 at 20:50


You could be right. I can't remember where I read it now, it was probably a thread here on it, someone who did it claimed this iirc.
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[*] posted on 15-1-2017 at 22:19


I just ran across this paper on the kinetics of the reaction between ethyl alcohol and sulfuric acid. It contradicts some other research I have seen, but this paper was published by ACS. While the researchers didn't look at the effect of water on the reaction, they did look at temperature, and apparently, heating for an extended period of time actually hurts the yield.... Also, they used equimolar quantities to achieve a 60% yield, which is actually good compared to what has often been reported for this reaction.

They stated that the reaction is complete in 10 minutes at 70 C with 95% sulfuric and 99.9% grain alcohol, and their suggestion is to add sulfuric acid to ethanol at a sufficient rate to attain and then maintain that temperature.


Attachment: EthylsulfuricReaction.pdf (1.6MB)
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[Edited on 16-1-2017 by JJay]




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