Hi Arkcon,
sorry for being too general. I was wondering whether someone will be willing to support. I'm positive surprised.
As for the process I plan to use a reactor according to patent DE10313150A1, an overview picture below:
It is a simple reactor with oil heating jacket with 3 reaction/heating zones, special designed auger shaft (kneading and stirring shaft) (also with heating jacket) and a filtration unit, etc.)
Depending on foam used process will be coducted in temperature 210°C for integral flexible foam, 220°C for slabstock flexible foam and 200°C for rigid foams. Under atmospheric pressure in presence of nitrogen. Water vapour from moisture closed within foam flakes (2-5cm) will be removed via entgassing unit.
Process consists of 3 reactions:
Aminolysis
Glycolysis (urethane bond)
Glycolysis (urea bond)
For aminolysis di-n-butylamine (DNBA) will be used, for glycolysis a mixture of diethylene glycol (DEG) and dipropylene grlycol (DPG). Obviously the ratio thereof will vary considering the PUR foam used.
As mentioned earlier, homogenous product is expected as a mixture of polyol, dispersed nanoscale oligourea particles (12-20nm), primary amines and carbamate.
I want to calculate energy which has to be delivered to break the urethane and urea bonds to regain the polyol used.
I wish also to confirm that temperatures I assumed are suitable to conduct the reactions.
The problem I faced is that I can't find thermodynamics data in T=298K for PUR foam, DNBA, DPG and DEG as Cp, enthalpy etc. to calculate specific heat and the change of standard enthaply taking the reactions in aforementioned temperatures.
If additional information are needed, please let me know.
Many thanks