反应详情

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.

1. temperatureunder reflux
2. temperatureunder reflux
3. customthe methylene chloride phase was separated off
4. temperaturewithout cooling
5. washwashed three times while still hot with 3 × 200 ml of water
6. customAfter the washing water had been carefully separated off
7. distillationthe methylene chloride was distilled off
8. customleaving 89.9 g (98% of the