Reacción #609429

Ecuación de reacción

3-chloro-1,2-dihydroxypropane

hydrochloric acid

sodium hydroxide

sodium hydroxide

hydrochloric acid

trimethylamine

dimethyloctylamine

hydrochloric acid

→

2,3-Dihydroxypropyloctyldimethylammonium chloride

Condiciones de reacción

Tratamiento posterior

1. 1
   workup.DISTILLATIONdistilled water
2. 2
   workup.ADDITIONis being mixed with a mechanical stirrer
3. 3
   Temperaturato increase the pH to 9.9
4. 4
   workup.ADDITIONThe reaction solution is mixed for one hour
5. 5
   Temperaturathe temperature is increased to 50° C
6. 6
   workup.WAITAfter another hour the reaction solution is
7. 7
   Temperaturato increase the pH to 9.5
8. 8
   workup.ADDITIONAfter four additional hours of mixing at 50° C. the pH is 11.7
9. 9
   Otrois reduced to 20° C.
10. 10
    workup.ADDITIONto mix at room temperature for five hours
11. 11
    TemperaturaThe temperature is increased to 40° C.
12. 12
    Temperaturathe pH is increased to 9.5
13. 13
    Otrothe reaction solution is purged with nitrogen overnight

Procedimiento

In a 2 L reactor system 358.81 g of 3-chloro-1,2-dihydroxypropane (99.3%, 3.22 moles) is added to 734.20 g distilled water. The solution is heated to 30° C. and 496.29 g dimethyloctylamine (98.5%, 3.11 moles) is added over 60 minutes while the reaction solution is being mixed with a mechanical stirrer. The pH is 8.9 and 3.83 g sodium hydroxide (50%) is added to increase the pH to 9.9. The reaction solution is mixed for one hour and then the temperature is increased to 50° C. After another hour the reaction solution is a “milky white” and the pH is 8.3. 19.6 g sodium hydroxide (50%) is added to increase the pH to 9.5. After four additional hours of mixing at 50° C. the pH is 11.7; 11.97 g concentrated hydrochloric acid is added to decrease the pH to 9.0. Thirty minutes later 3.30 g of concentrated hydrochloric acid is added to decrease the pH to 8.9. The solution is allowed to stir for 16 hours at 50° C. The reaction solution pH is 10.7 and 2.58 g concentrated hydrochloric acid is added to reduce the pH to 8.0. The temperature is reduced to 20° C. and 24.23 g trimethylamine (43.6%) is added and allowed to mix at room temperature for five hours. The temperature is increased to 40° C. and the pH is increased to 9.5 and the reaction solution is purged with nitrogen overnight. The solution is pH adjusted to 6.5 with concentrated hydrochloric acid. The isolated product has the following structure:

Fuente