Process for the purification of 1, 4-butanediol

Details Process for the purification of 1, 4-butanediol Process for the purification of 1, 4-butanediol

C - Chemistry, Metallurgy

07

C

C07C 31/20 (2006.01) C07C 29/90 (2006.01) C07D 307/08 (2006.01) C07D 307/32 (2006.01)

Patent

CA 2581539

A process for the purification of a crude liquid feed stream comprising 1,4- butanediol and a minor amount of 2-(4-hydroxybutoxy)-tetrahydrofuran and/or precursors thereof wherein the process comprises passing the crude feed in the presence of hydrogen in a reaction zone over a heterogeneous liquid tolerant copper catalyst in the liquid phase at hydrogenation conditions and recovering a purified stream of 1,4-butanediol having a lower amount of 2-(4- hydroxybutoxy)-tetrahydrofuran than the crude liquid feed stream.

La présente invention concerne un procédé pour la purification d~un flux d~alimentation liquide brut comprenant du 1,4-butanediol et une quantité mineure de 2-(4-hydroxybutoxy)tétrahydrofuranne et/ou de ses précurseurs. Le procédé comprend le passage de l~alimentation brute, en présence d~hydrogène, dans une zone de réaction sur un catalyseur au cuivre tolérant au liquide hétérogène en phase liquide à des conditions d~hydrogénation, et la récupération d~un flux purifié de 1,4-butanediol comportant une quantité de 2-(4-hydroxybutoxy)tétrahydrofuranne inférieure à celle du flux d~alimentation liquide brut.

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