Process for the preparation of glyoxal, alkylglyoxals and acetal

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

1984-12-17

1986-08-19

Reamer, James H.

Organic compounds -- part of the class 532-570 series

Organic compounds

Oxygen containing

568392, 568567, 568465, C07C 4553

Patent

active

046071261

ABSTRACT:
The invention relates to a process for the preparation of glyoxal, alkylglyoxals and acetals thereof by reacting .alpha.,.beta.-unsaturated dialkylacetals with the equivalent amount of ozone and subsequently subjecting the ozonization 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.

REFERENCES:
patent: 1902070 (1933-03-01), Halbig et al.
patent: 2288211 (1942-06-01), Schulz
patent: 2733270 (1956-01-01), Fisher
patent: 4107217 (1978-08-01), Schreiber et al.
patent: 4434305 (1984-02-01), Kurosaka et al.
Bestmann et al, Chem. Ber., vol. 116, pp. 3264-3266 (1983).
Jung et al, Chem. Abst., vol. 96, #85027a (1982).

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