Hydrochloric Acid → 1-Naphthol
Reaktionsgleichung
Cl.[C:2]1([O-:12])[C:11]2[C:6](=[CH:7][CH:8]=[CH:9][CH:10]=2)[CH:5]=[CH:4][CH:3]=1.[K+]>>[C:2]1([OH:12])[C:11]2[C:6](=[CH:7][CH:8]=[CH:9][CH:10]=2)[CH:5]=[CH:4][CH:3]=1Komponenten
3
Versuchsvorschrift
An alcoholic solution of potassium α-naphtholate produced as in Example 4 hereinabove is acidified with gaseous hydrochloric acid taken in the equimolar amount relative to potassium α-naphtholate at a temperature ranging from 20° to 30° C. After separation of precipitated pure potassium chloride, the solution of α-naphthol in ethanol is separated following the procedure described in the foregoing Example 4 to give 116 g of α-naphthol with a purity of 97.5%. The total yield of α-naphthol is 140 g (98% of theory) as calculated for the employed naphthalene.
Aufarbeitung
- customranging from 20° to 30° C
- customAfter separation of precipitated pure potassium chloride
- customthe solution of α-naphthol in ethanol is separated