This Carbamate Crystallization Temperature Calculator has been the result of the co-operation between UreaKnowHow.com and Virtual Materials Group.
Virtual Materials Group Inc. is a global supplier of process simulation software for the oil, gas and chemical industries. Our suite of products includes the fully interactive steady-state and dynamic process simulator VMGSimTM and the industrially proven thermo-physical property calculation engine VMGThermoTM. VMG's products are backed by an extremely accomplished group of scientists and engineers, dedicated to provide timely and effective world-class solutions.
This graph is a digitalised version of Janecke phase diagrams and only the relevant composition area of carbamate recycle streams in urea plants are digitalised with high accuracy.
For most reliable temperature estimates, maintain concentrations within the following ranges:
- 25-40 wt% water and a molar N/C ratio of about 1.8-2.2
- 15-40 wt% water and a molar N/C ratio of about 2.2-2.6
These are the areas best covered by the Janecke plot and therefore the ones most accurately represented in the calculator's interpolation model.