Reaction #1375809

Reaction equation

ammonia

urea

diethylenetriamine

Ammonia

→

2-aminoethyl imidazolidinone

Conditions

Workup

1. 1
   workup.ADDITIONwere charged
2. 2
   workup.ADDITIONThe reaction mix
3. 3
   Otherto evolve at about 130° C
4. 4
   TemperatureThe temperature was slowly raised to 150° C
5. 5
   Otherthe remaining ammonia was removed
6. 6
   OtherProduct yield
7. 7
   Otherat 25° C.
8. 8
   workup.DISTILLATIONfurther purified by vacuum distillation

Procedure

In a suitable reactor equipped with agitation and a reflux condenser, 465 parts by weight of urea and 798 parts by weight of diethylenetriamine were charged. The reaction mix was slowly heated to 140° C. Ammonia started to evolve at about 130° C. The temperature was slowly raised to 150° C. As the evolution of ammonia subsided, vacuum was applied and the remaining ammonia was removed. Product yield was approximately 1000 parts by weight. The product had a viscosity of 6000 cps at 25° C. and an MEQ/g of 6.5. (MEQ=milliequivalent weight). Gel phase analysis of the product showed approximately 95% purity. The product can be used as is or further purified by vacuum distillation. The major impurity is unreacted diethylenetriamine.

Source