Methylhydroquinone → Durohydroquinone

HRID 380778

Reaktionsgleichung

Reaktionsgleichung von HRID 380778
[CH3:1]C1C=C(O)C=CC=1O.CC1C(C)=C(C=CC=1O)O.[CH3:20][C:21]1[C:22]([OH:30])=[C:23]([CH3:29])[C:24]([CH3:28])=[C:25]([CH:27]=1)[OH:26]>[O-2].[Cr+3].[O-2].[O-2].[Cr+3].CO>[CH3:20][C:21]1[C:22]([OH:30])=[C:23]([CH3:29])[C:24]([CH3:28])=[C:25]([OH:26])[C:27]=1[CH3:1]

Komponenten

6

Edukt 3

HCID 7253Methylhydroquinone2×HCID 12785TrimethylhydroquinoneHCID 691002,3-Dimethylhydroquinone

Produkt 1

HCID 136346Durohydroquinone

Reagenzien, Katalysatoren, Lösungsmittel 2

HCID 165971Chromium oxideKatalysatorHCID 887MethanolLösungsmittel

Versuchsvorschrift

Into an autoclave (inner volume: 9 ml, made of SUS 316, equipped with a manometer) were charged 0.115 g of methylhydroquinone, 3.268 g of methanol and 4.6 mg of chromium oxide (manufactured by High Purity Chemicals). The reaction was started by elevating the temperature up to 350° C. with sand bath. The pressure during the reaction was 18 MPa. After 2 hours, the autoclave was quickly cooled and the reaction solution was taken out from the autoclave when the temperature was cooled back to the room temperature. The measurement according to the process described above revealed that the conversion of methylhydroquinone was 17% by mole, the selectivity of dimethylhydroquinone was 74% by mole and the selectivity of trimethylhydroquinone was 2% by mole. No tetramethylhydroquinone was produced.

Aufarbeitung

  1. customequipped with a manometer)
  2. customup to 350° C.
  3. temperaturethe autoclave was quickly cooled

Quellen und Nachweise

ORD-Eintrag
ord-e89f99fbd2f24f859f6b97f987213038
Quelldatensatz
uspto-grants-2001_10
Patentnummer
US06303801B1

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