Method for producing 1,6-hexanediol

Details Method for producing 1,6-hexanediol Method for producing 1,6-hexanediol

C - Chemistry, Metallurgy

07

C

C07C 29/149 (2006.01) C07C 29/80 (2006.01) C07C 31/20 (2006.01)

Patent

CA 2755696

The invention relates to a method for producing 1,6-hexanediol, preferably of at least 99.5% purity, which hexane-diol is especially substantially free from 1,4 cyclohexanediols, starting from a carboxylic acid mixture which is obtained as a by-product of the catalytic oxidation of cyclohexane to cyclohexanone/cyclohexanol with oxygen or gases containing oxygen and by extraction of the reaction mixture with water, and by hydrogenation of the carboxylic acid mixture, esterification and hydrogenati-on of a partial flow to hexanediol.

Procédé de production de 1,6-hexanediol, présentant de préférence une pureté d'au moins 99,5 %, qui est en particulier pratiquement exempt de 1,4-cyclohexanediols, à partir d'un mélange d'acide carboxylique obtenu en tant que sous-produit de l'oxydation catalytique de cyclohexane en cyclohexanone/cyclohexanol avec de l'oxygène ou des gaz contenant de l'oxygène, et par extraction d'eau du mélange de réaction, par hydrogénation du mélange d'acide carboxylique, estérification et hydrogénation d'une partie du flux en hexanediol.

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