Glycolaldehyde or ethylene glycol from formaldehyde

Details Glycolaldehyde or ethylene glycol from formaldehyde Glycolaldehyde or ethylene glycol from formaldehyde

1980-07-24

1982-03-30

Evans, Joseph E.

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

Organic compounds

Oxygen containing

C07C 2914

Patent

active

043225683

ABSTRACT:
An aqueous 30 wt. % solution of formaldehyde trickled with an equal volume of NaOH solution over a zeolite (NaX, 5 A, or Na Mordenite) at 94.degree. C., 1 atm, 1.21-2.36 liquid hourly space velocity, catalytically condenses to HOCH.sub.2 CHO, glycolaldehyde, a fraction of which then converts to HOCH.sub.2 CH.sub.2 OH, ethylene glycol, by cross-Cannizzaro side reaction. Zeolite degradation is prevented by maintaining pH near 11. Selectivity can be controlled so that less than 1% byproduct formose sugars are made. Methanol and sodium formate are also byproducts. All of the remaining glycolaldehyde could, in principle, be converted to ethylene glycol in either a subsequent cross-Cannizzaro reaction or a hydrogenation step. Thus, the reaction represents a potential non-petrochemical route for either glycolaldehyde or ethylene glycol from CO+H.sub.2, via methanol and formaldehyde.

REFERENCES:
patent: 1213740 (1917-01-01), Calvert
patent: 1569775 (1926-01-01), Mittasch et al.
patent: 2224910 (1940-12-01), Hanford et al.
patent: 2760983 (1956-08-01), MacLean et al.
patent: 4200765 (1980-04-01), Goetz

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