Réaction #50280

Équation de réaction

epichlorohydrin

epichlorohydrin

water

potassium hydroxide

water

cyclohexane

nonylphenol

epichlorohydrin

→

pale-yellow liquid

1,3-Bis(nonylphenoxy)-2-propanol

Conditions de réaction

Traitement

1. 1
   AutreTo a five neck, two liter round bottom flask, equipped with an addition funnel
2. 2
   TempératureThe solution was then heated
3. 3
   Températureto reflux
4. 4
   AutreAfter essentially all the water was recovered in the decanting head (60 milliliter+19 milliliters formed)
5. 5
   workup.ADDITIONDuring the addition
6. 6
   Températurethe reaction temperature was maintained below 60° C.
7. 7
   Températureto reflux for an additional three hours
8. 8
   FiltrationThe reaction mixture was then filtered under vacuum through a steam-jacketed Buchner funnel
9. 9
   Autreto remove the potassium chloride
10. 10
    Autreformed as a by-product
11. 11
    Autreto remove the majority of the salts
12. 12
    AutreThe reaction mixture was then placed in a one liter round bottom flask
13. 13
    workup.DISTILLATIONthe remaining cyclohexane and unreacted nonylphenol were recovered by distillation, first at atmospheric pressure
14. 14
    workup.DISTILLATIONto exceed 180° C. during the distillation

Mode opératoire

To a five neck, two liter round bottom flask, equipped with an addition funnel, thermometer, nitrogen dispersant tube, mechanical stirrer, and a decanting head with a water-cooled condenser, were added 300 milliliters of cyclohexane and 451.7 grams (2.05 mole) of nonylphenol. The solution was then heated to reflux and 58.9 grams (1.05 mole) of potassium hydroxide in 60 milliliters of water was slowly added via the addition funnel. After essentially all the water was recovered in the decanting head (60 milliliter+19 milliliters formed), the reaction was cooled to 40° C., and 92.5 grams (1.00 mole) of epichlorohydrin was slowly added. During the addition, the reaction temperature was maintained below 60° C. by controlling the rate of epichlorohydrin addition. After all the epichlorohydrin was added, the solution was allowed to stir for one hour, and then brought to reflux for an additional three hours. The reaction mixture was then filtered under vacuum through a steam-jacketed Buchner funnel to remove the potassium chloride formed as a by-product. The filtration process was performed a total of three times to remove the majority of the salts. The reaction mixture was then placed in a one liter round bottom flask, and the remaining cyclohexane and unreacted nonylphenol were recovered by distillation, first at atmospheric pressure, then under vacuum at 0.2 mm Hg. The kettle temperature was not allowed to exceed 180° C. during the distillation to prevent discoloration of the product. The concentrated solution was then refiltered to give 275 grams of a pale-yellow liquid. End-group MW analysis gave a molecular weight of 459.7 (theoretical MW=496.8). Ir and nmr spectra were identical to previously recorded spectra for the compound.

Source