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US 2025/0019331 A1Published application
1,3-butanediol purified from a mixture of diols
AssigneeNovamont S.p.A.
InventorsMarco COTTI COMETTINI, Virginia ALBERTI
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Abstract
The present invention relates to a process for separating 1,3- and 1,4-butanediol from a mixture thereof and a composition of 1,3-butanediol that, through this process, simultaneously achieves a high recovery of 1,4-BDO and an increase in the purity of 1,3-BG.
Claims20
A process for separating 1,3-butanediol and 1,4-butanediol from a mixture thereof, comprising the steps of:
- a) removing from that mixture, by one or more distillation operations,
- i. the solvent
- ii. a heavy fraction
- iii. a light fraction
- iv. a fraction comprising 1,4-butanediol,
- in which at least one of said fractions (iii) and (iv) includes 1,3-butanediol and an amount of 1,4-butanediol monoacetate greater than 1 ppm and less than 10% by weight with respect to the weight of the composition;
- b) subjecting at least one of said fractions (iii) and (iv) comprising 1,3-butanediol and 1,4-butanediol monoacetate to at least one hydrolysis reaction;
- c) subjecting at least one of said fractions (iii) and (iv) hydrolysed in step (b) to distillation.
5 more elements
Dependencies are inferred from the claim text.