Water → 2-Chlorobenzaldehyde

Temperatur

120 °C

195.3 g (1.0 mol) of 2-chlorobenza1 chloride are initially charged at 120° C. At this temperature 20 ml (21.8 g, 1.09 mol of water) of a 10% strength aqueous zinc chloride solution are metered in over a period of 5 hours. The mixture is stirred for a further 30 minutes at 120° C. After cooling to room temperature the reaction mixture is extracted with 1×10 ml and 2×5 ml of water. The organic phase is subsequently free of chloride and is worked up by distillation. 136.0 g (97% of theoretical) of 2-chlorobenzaldehyde (b.p.: 90° C./16 torr) with a purity of >99.9% are obtained. The combined aqueous phases (20 ml, 22.0 g) are used in Example 2 as catalyst solution.

1. customare metered in over a period of 5 hours
2. temperatureAfter cooling to room temperature the reaction mixture
3. extractionis extracted with 1×10 ml and 2×5 ml of water
4. distillationis worked up by distillation

ORD-Eintrag

ord-65bdd95af8a9428f99b5fa1056b12e76

Quelldatensatz

uspto-grants-1994_09

DOI

10.6084/m9.figshare.5104873.v1

Patentnummer

US05347054