1,3-Butadiene → 2,6-Dimethylnaphthalene

HRID 617625

Reaktionsgleichung

Reaktionsgleichung von HRID 617625
[CH3:1][C:2]1[C:7]2[CH:8]=CC=C(C)[C:6]=2[CH:5]=[CH:4][CH:3]=1.[CH2:13]=[CH:14][CH:15]=[CH2:16]>CC1C=CC=CC=1C>[CH3:13][C:14]1[CH:6]=[CH:5][C:4]2[CH:3]=[C:2]([CH3:1])[CH:7]=[CH:8][C:16]=2[CH:15]=1

Komponenten

4

Edukt 2

HCID 78451,3-ButadieneHCID 113061,5-Dimethylnaphthalene2×

Produkt 1

HCID 113872,6-Dimethylnaphthalene

Reagenzien, Katalysatoren, Lösungsmittel 1

HCID 7237O-XyleneLösungsmittel

Versuchsvorschrift

The present inventors synthesized 1,5-DMN from o-xylene and butadiene as the starting raw materials and isomerized the resultant 1,5-DMN to obtain the mixture of isomers consisting essentially of 1,5-, 1,6- and 2,6-DMNs, which was cooled as it is to precipitate 2,6-DMN crystal in the form of scale. The crystal thus obtained was poor in the efficiency of separation from the mother liquor at the time of filtration, whereby it was difficult to obtain highly pure 2,6-DMN. As is the case with the foregoing, 2,6-DMN crystal in the form of scale was obtained from the mixture of isomers containing 2,7-, 1,7-DMN, etc. other than 1,5-, 1,6- and 2,6-DMN as the starting raw material for crystallization, but it was extremely poor in filtration efficiency.

Aufarbeitung

  1. customto obtain
  2. additionthe mixture of isomers
  3. temperature2,6-DMNs, which was cooled as it
  4. customto precipitate 2,6-DMN crystal in the form of scale
  5. customThe crystal thus obtained
  6. customwas poor in the efficiency of separation from the mother liquor at the time of filtration, whereby it

Quellen und Nachweise

ORD-Eintrag
ord-a4e82ec4219f4f7aa3863c06354f3ddf
Quelldatensatz
uspto-grants-1999_09
Patentnummer
US05948949

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