Method for reducing the content of acetals or ketals in alcohol-containing reaction mixtures
AssigneeDegussa-Huls AG
InventorsThomas Haas, Bernd Jäger, Jörg Sauer, Rudolf Vanheertum
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Abstract
Reduction in the content of acetals or ketone acetals in a reaction mixture containing at least 10 moles alcohol per mole acetal or ketone acetal can be achieved hydrogenolytically when the reaction mixture is hydrogenated at 80° to 250° C. at a hydrogen partial pressure of 0.5 to 30 MPa in the presence of activated carbon charged with noble metal as catalyst.
Claims8
A method for reducing the content of acetals, except formals, or ketals in an aqueous reaction mixture containing at least 10 moles of a mono- or polyvalent alcohol per mole of the acetal or ketal by heterogeneous, catalytic hydrogenation of the reaction mixture with hydrogen at a temperature of 80° to 250° C. and a hydrogen partial pressure of 0.5 to 30 MPa, comprising using activated carbon charged with noble metal as catalyst.
Dependencies are inferred from the claim text.