O,O'-Ddt → O,O'-Dde
Reaktionsgleichung
[Cl:1][C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][C:3]=1[CH:8]([C:13]1[CH:18]=[CH:17][CH:16]=[CH:15][C:14]=1[Cl:19])[C:9](Cl)([Cl:11])[Cl:10].[Cl-].C[NH+](C)CCCCCCCCCCCCCC1C=CC=CC=1>>[Cl:1][C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][C:3]=1[C:8]([C:13]1[CH:18]=[CH:17][CH:16]=[CH:15][C:14]=1[Cl:19])=[C:9]([Cl:10])[Cl:11]Komponenten
3
Versuchsvorschrift
990 kg of solid 1,1-bis(chlorophenyl)-2,2,2-trichloroethane were charged into the basic aqueous phase emanating from an upstream dehydrochlorination operation. The charging period was 2 hours to avoid the formation of solid masses inside the reactor. 5 kg of dimethylbenzyllaurylammonium chloride were added, while intense stirring was continued for 4 hours at 100°. After 1 hour at rest, the aqueous phase was separated off and 268 kg of 50% strength sodium hydroxide were added and the dehydrochlorination was continued with stirring at 100° C. for 10 hours. After dilution with 560 kg of water and 1 hour at rest, the organic phase was drawn off and the aqueous phase was retained for the following operation. The organic phase was then washed 3 times with 250 kg of a 1N solution of sulfuric acid and 879 kg of 1,1-bis(chlorophenyl)-2,2-dichloroethylene were obtained.