Method for producing hexanediol

Details Method for producing hexanediol Method for producing hexanediol

C - Chemistry, Metallurgy

07

C

C07C 29/149 (2006.01) B01J 23/72 (2006.01) C07C 31/20 (2006.01)

Patent

CA 2329040

The invention relates to a method for producing hexanediol by hydrogenating adipic acid dialkyl esters or mixtures containing adipic acid dialkyl esters as an essential constituent and organic halogen compounds as impurities. According to said method, the adipic acid dialkyl esters or the mixtures containing adipic acid dialkyl esters are guided over copper catalysts at a temperature of 50 to 250 °C and at a pressure of 1 to 100 bar before hydrogenation in order to remove the organic halogen compounds. Said copper catalysts contain 0.5 to 80 wt. % copper calculated as CuO and have a surface of 5 to 1500 m2/g, 0.05 to 1.5 cm3/g porosity and a copper surface of 0.1 to 20 m2/g.

L'invention concerne un procédé de production d'hexanediol par hydrogénation de dialkylesters d'acide adipique ou de mélanges contenant des dialkylesters d'acide adipique comme constituant principal et des composés halogénés organiques comme impuretés. Selon ce procédé, on fait passer les dialkylesters d'acide adipique ou les mélanges contenant des dialkylesters d'acide adipique sur des catalyseurs de cuivre avant l'hydrogénation pour éliminer les composés halogénés organiques, à une température comprise entre 50 et 250 DEG C et une pression de 1 à 100 bars, lesdits catalyseurs présentant une teneur en cuivre, calculée en tant que CuO, de 0,5 à 80 % en poids, une surface de 5 à 1500 m<2>/g, une porosité de 0,05 à 1,5 cm<3>/g et une surface de cuivre de 0,1 à 20 m<2>/g.

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