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Author: Subject: Help recrystalizing dimethylbenzenesulfonic acid
myristicinaldehyde
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[*] posted on 25-11-2017 at 04:47
Help recrystalizing dimethylbenzenesulfonic acid


I followed the following procedure from Vogel's 5 th edition. It worked almost exactly as described, even using multiple xylenes and shitty sulfuric acid. One comment though- I heated for 4 hours on a water bath, not 15min.

When I tried to recrystalize from water, it does not want to come back out of solution! Any ideas? I fear hydrolysis, if I try to evaporate off more water.

If I can get it back out of solution again, Ill make a writeup. It is a suprisingly easy reaction.

image.jpeg.png - 304kB

[Edited on 2017-11-26 by myristicinaldehyde]




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[*] posted on 25-11-2017 at 12:56


It ended up crystalizing by itself when I took it *out* of the freezer. Hmmm.



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[*] posted on 25-11-2017 at 13:04


That happens more often than you expect.
If you get the stuff cold enough the viscosity of the solution inhibits the crystal growth.
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