Dimethyl-2,6-naphthalenedicarboxylate → 2,6-Naphthalenedicarboxylic acid

HRID 2379

Reaktionsgleichung

Reaktionsgleichung von HRID 2379
C[O:2][C:3]([C:5]1[CH:14]=[CH:13][C:12]2[C:7](=[CH:8][CH:9]=[C:10]([C:15]([O:17]C)=[O:16])[CH:11]=2)[CH:6]=1)=[O:4]>[Cr].[Co]>[CH:11]1[C:12]2[C:7](=[CH:6][C:5]([C:3]([OH:4])=[O:2])=[CH:14][CH:13]=2)[CH:8]=[CH:9][C:10]=1[C:15]([OH:17])=[O:16]

Komponenten

3

Edukt 1

HCID 61225Dimethyl-2,6-naphthalenedicarboxylate2×

Produkt 1

HCID 143572,6-Naphthalenedicarboxylic acid

Reagenzien, Katalysatoren, Lösungsmittel 1

HCID 11332432Hastelloy CKatalysator

Versuchsvorschrift

Dimethyl-2,6-naphthalenedicarboxylate was hydrolyzed at elevated temperatures and elevated pressures in the batch-mode in a stirred, 300 ml Hastelloy C autoclave reactor. 37.5 Grams of dimethyl-2,6-naphthalenedicarboxylate were charged to the reactor. No catalyst was used. The 2,6-NDA product was separated from the mother liquor by filtration at room temperature followed by washing with about 150 grams of water. The reaction time, temperature, pressure and analysis of the resulting 2,6-naphthalenedicarboxylic acid are provided in Table 2. During each of the runs reported in Table 2, approximately one-half of the solvent was unintentionally lost. This loss of solvent likely caused the removal of methanol from the reaction mixture thereby shifting the equilibrium towards 2,6-naphthalenedicarboxylic acid. Runs 1, 2 and 3 reported in Table 2 were run consecutively in the same autoclave reactor.

Aufarbeitung

  1. customThe 2,6-NDA product was separated from the mother liquor by filtration at room temperature
  2. washby washing with about 150 grams of water

Quellen und Nachweise

ORD-Eintrag
ord-d6f1159968164ca59973a165fcea56a0
Quelldatensatz
uspto-grants-1998_03
Patentnummer
US05728870

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