1,2-Butanediol → 1,3-Butadiene

HRID 2119101

Reaktionsgleichung

Reaktionsgleichung von HRID 2119101
[CH2:1]([OH:6])[CH:2](O)[CH2:3][CH3:4].C(O[CH:11](O)[CH2:12][CH2:13][CH3:14])(=[O:9])C.C(OC(C)C(OC(=O)C)C)(=O)C>C(O)(=O)C>[CH2:1]([OH:6])[CH2:2][CH2:3][CH2:4][OH:9].[CH2:11]=[CH:12][CH:13]=[CH2:14]

Komponenten

6

Edukt 3

HCID 114291,2-Butanediol2×HCID 66193Butane-2,3-diyl diacetateHCID 18369038Acetoxyhydroxybutane

Produkt 2

HCID 78451,3-ButadieneHCID 80641,4-Butanediol

Reagenzien, Katalysatoren, Lösungsmittel 1

HCID 176Acetic AcidLösungsmittel

Versuchsvorschrift

Further, in a process for preparing a polyester according to the present invention, crude 1,2-butanediol (hereinafter referred to as crude 1,2-BG) containing acetoxyhydroxybutane and/or diacetoxybutane may be used as 1,2-butanediol. Crude 1,2-BG is usually formed as a by-product during the preparation of 1,4-butanediol by the reaction of butadiene with acetic acid, such crude 1,2-BG contains various acetoxy compounds. For instance, from a gas chromatography analysis, a typical sample of such crude 1,2-BG has been found to have a composition comprising 54% by weight of 1,2-BG, 23% by weight of 1-acetoxy-2-hydroxybutane, 8% by weight of 1-hydroxy-2-acetoxybutane, 10% by weight of 1,2-diacetoxybutane and 5% by weight of other substances such as 1,3-butanediol and 1,4-butanediol, and thus it has been found that the major components of the impurities are acetoxy derivatives of 1,2-BG.

Quellen und Nachweise

ORD-Eintrag
ord-8bcac8e89a004a9c93fb5a3531d79e06
Quelldatensatz
uspto-grants-1987_07
Patentnummer
US04681975

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