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Topic: Methacrolein disposal  (Read 170 times)

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Offline pyngjls

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Methacrolein disposal
« on: August 27, 2019, 09:09:38 AM »
I'm using a maximum of 5 mL methacrolein for a modified Kröhnke pyridine synthesis step. The chemical's pretty nasty, and as far as I know using acidic or basic work-ups are a no-go because methacrolein will react violently with it. Any idea on how to dispose of methacrolein/methacrolein containing solvents?
« Last Edit: August 27, 2019, 10:34:27 AM by pyngjls »

Offline pgk

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Re: Methacrolein disposal
« Reply #1 on: August 27, 2019, 11:17:30 AM »
Methacrolein disposal can be treated in the same way as the acrolein one:
“Acrolein may be subject to explosive self-polymerization. Handle with care. Discharge carefully into water, add excess 10% sodium bisulfite (Na2HSO3) solution (prepared by dissolving sodium metabisulfite Na2S2O5 crystals in water). Dilute product with a lot of water and discharge into an oxidation pond, or transport without dilution to an incineration plant.”
But please, note that methacrolein is more reactive than acrolein. So, work carefully in the safety hood with shut safety screen and take the appropriate safety measures.
1). ACROLEIN-HEALTH AND SAFETY GUIDE, Health and Safety Guide No. 67, IPCS International Programme on Chemical Safety, WHO, Geneva, (1991)
http://www.inchem.org/documents/hsg/hsg/hsg067.htm
2). Bisulfite Adducts of Acrolein, J. Org. Chem., (1962), 27(2), 649-651
https://pubs.acs.org/doi/pdf/10.1021/jo01049a520

« Last Edit: August 27, 2019, 11:41:50 AM by pgk »

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