Process for preparing butanediol and/or butenediol
AssigneeMitsubishi Chemical Industries Limited
InventorsYasuo Tanabe, Jun Toriya, Masato Sato, Ken Shiraga
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Abstract
Butanediol and/or butenediol are prepared by hydrolyzing diacetoxybutane and/or diacetoxybutene in the presence of a cation-exchange resin and recovered by fractional distillation. By the treatment of the hydrolyzed product with an anion exchange resin at any stage before the butanediol and/or butenediol are fractionated, butanediol and/or butenediol are recovered in high yield.
Claims8
In a process for preparing butanediol or butenediol by hydrolyzing diacetoxybutane or diacetoxybutene in the presence of a cation-exchange resin having at least one sulfo group as a functional group, and recovering butanediol or butenediol from the hydrolyzed product by distillation, the improvement which comprises treating the hydrolyzed product containing butanediol or butenediol with a weak anion-exchange resin which has a primary, secondary or tertiary amine groups at a temperature of 20.degree. to 100.degree. C at any stage before the butanediol or butenediol are fractionated.
Dependencies are inferred from the claim text.