Reaktion #346272

Reaktionsgleichung

sulphuric acid

2-nitrotoluene

nitric acid

→

dinitrotoluene

Ausbeute 99.0%

Lösungsmittel

methylene chloride

Reaktionsbedingungen

Aufarbeitung

1. 1
   Temperaturunder reflux
2. 2
   Temperaturunder reflux
3. 3
   Sonstigethe methylene chloride phase was separated off
4. 4
   Temperaturwithout cooling
5. 5
   Waschenwashed three times while still hot with 3 × 200 ml of water
6. 6
   SonstigeAfter the washing water had been carefully separated off
7. 7
   workup.DISTILLATIONthe methylene chloride was distilled off
8. 8
   Sonstigeleaving 89.9 g (98% of the

Vorschrift

68.6 g (0.5 mol) of 2-nitrotoluene were dissolved in 80 ml of methylene chloride and 38.6 g (0.6 mol) of 98% by weight nitric acid, followed by the addition under reflux with stirring over a period of 1 hour at boiling temperature of 40 g of 100% by weight sulphuric acid. After stirring for 2 hours under reflux, the methylene chloride phase was separated off without cooling and washed three times while still hot with 3 × 200 ml of water. After the washing water had been carefully separated off, the methylene chloride was distilled off, leaving 89.9 g (98% of the theoretical yield) of dinitrotoluene containing 99% of 2,4- and 2,6-dinitrotoluene.

Quelle