Reaktionsgleichung
[O:1]1[CH2:5][CH2:4][CH2:3][CH2:2]1.C=C[CH:8]=[CH2:9].[O:10]=O.[C:12]([OH:15])(=[O:14])[CH3:13]>>[C:8]([O:1][CH:5]=[CH:4][CH2:3][CH2:2][O:14][C:12](=[O:15])[CH3:13])(=[O:10])[CH3:9]Komponenten
Versuchsvorschrift
1,4-BG is useful as a raw material for e.g. polyester or tetrahydrofuran. Some methods for producing 1,4-BG are known, and one of which comprises acetoxylating butadiene with acetic acid and oxygen to form 1,4-diacetoxybutene, hydrogenating the 1,4-diacetoxybutene to form 1,4-diacetoxybutane and then hydrolyzing the 1,4-diacetoxybutane to obtain 1,4-BG. A purified 1,4-BG is recovered from the hydrolysis product by multi-step distillations. One of which comprises supplying the hydrolysis product to a first distillation column, distilling off substantially all the amounts of water and acetic acid from the top of the column, supplying the bottom liquid to a second distillation column, distilling off an unreacted substance from the top of the second distillation column, circulating the distillate to a hydrolysis step, while distilling the bottom liquid from the second distillation column in a third distillation column to obtain 1,4-BG as a product (Japanese Patent Laid Open No. 19610/1977).
Aufarbeitung
- customSome methods for producing 1,4-BG
Quellen und Nachweise
- ORD-Eintrag
- ord-d3578f0c8f5c4a9fa14df25f5bc21857
- Quelldatensatz
- uspto-grants-1995_03
- Patentnummer
- US05397439
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