Process for the purification of butane-1,4-diol

Details Process for the purification of butane-1,4-diol Process for the purification of butane-1,4-diol

C - Chemistry, Metallurgy

07

C

C07C 31/20 (2006.01) C07C 29/132 (2006.01) C07C 29/88 (2006.01)

Patent

CA 2250220

The invention provides a process for the purification of a butane-1,4-diol feed containing a minor amount of the cyclic acetal, 2- (4'-hydroxybutoxy)-tetrahydrofuran, which comprises hydrogenating the butane- 1,4-diol feed in a hydrogenation zone in the presence of a minor amount of water and of a hydrogenation catalyst, and recovering from the hydrogenation zone a butane-1,4-diol product that has a reduced 2-(4'-hydroxybutoxy)-tetrahydrofuran content compared with the butane- 1,4-diol feed.

L'invention porte sur un procédé de purification de butane-1,4-diol contenant une quantité réduite d'acétal cyclique 2-(4'-hydroxybutoxy)-tetrahydrofuranne, par l'hydrogénation d'un apport de butane-1,4-diol dans une zone hydrogénation en présence d'une faible quantité d'eau et d'un catalyseur d'hydrogénatin. Le produit récupéré dans la zone d'hydrogénation est un butane-1,4-diol dont la teneur en 2-(4'-hydroxybutoxy)-tétrahydrofuranne a été réduite par rapport à l'apport initial de butane-1,4-diol.

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