Process for the preparation of glyoxal, alkylglyoxals and...

Details Process for the preparation of glyoxal, alkylglyoxals and... Process for the preparation of glyoxal, alkylglyoxals and...

C - Chemistry, Metallurgy

07

C

260/570, 260/585

C07C 47/127 (2006.01) C07C 45/40 (2006.01) C07C 45/51 (2006.01) C07C 47/198 (2006.01) C07C 49/175 (2006.01) C07C 49/185 (2006.01)

Patent

CA 1260496

Abstract The invention relates to a process for the prepa- ration of glyoxal, alkylglyoxals and acetals thereof by reacting .alpha..beta.-unsaturated dialkylacetals with the equiva- lent amount of ozone and subsequently subjecting the ozon- ization products to catalytic hydrogenation, the peroxide- containing ozonization solution being fed continuously into a suspension of the hydrogenation catalyst, while a peroxide content of not more than 0.1 mole/liter is maintained, and cleaving the ozonization products by reduction, after which the dialkylacetals formed in the hydrogenation are, if desired, cleaved to give glyoxal or alkylglyoxals.

469944

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