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I am aware that the standard way to remove MEHQ from Methacrylic Acid is to perform reduced pressure distillation. The papers I see suggest using ~ 10 Torr pressure to perform distillation. Sandler's book (Polymer synthesis by Stanley Sandler, volume II page 304) suggests distillation through a column containing copper. Unfortunately, neither do I have access to such a pump nor do I have access to the said copper cloth. I am very aware of the fact that I can just add a little extra initiator; I have done that in the past but those batches have had very unreliable results. I was wondering if there was a way of removing MEHQ apart from the reduced pressure technique.

One of the options I see are inhibitor removers from Sigma (https://www.sigmaaldrich.com/catalog/product/aldrich/306312?lang=en&region=US) but I am unable to find literature citing the use of the same with Methacrylic acid. Especially since MAA is very viscous.

Looking forward to suggestions!

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  • $\begingroup$ Have you tried running a TLC in DCM? I don't know how stable MAA is on silica but if it looks stable (on for example 2D TLC) and get separation, you could just try a normal column. $\endgroup$ – bdbdbd Oct 24 '18 at 22:55

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