Acetic Acid → Butane-2,3-diyl diacetate

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Diacetoxybutene which had been prepared by catalytically reacting butadiene, acetic acid and an oxygen-containing gas with a palladium-based catalyst at 80° to 100° C, was hydrogenated in the presence of a palladium catalyst carried on activated carbon to produce diacetoxybutane having the composition set forth below. The resulting diacetoxybutane was then hydrolyzed in the presence of a cation exchange resin, DIAION SK1B, (trade mark, manufactured by Mitsubishi Chemical Industries Ltd.) at about 60° C and subjected to distillation to prepare crude 1,4-butanediol, which contained 98.5 % by weight of 1,4-butanediol, 0.7 % by weight of high boiling substances and 0.8 % by weight of other substances.

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