Urea provides the feedstock for all melamine-producing plants.
The highest degree of urea-to-melamine conversion in this process is only 50% - which means half of all the urea fed to a melamine plant is decomposed back to its original components (ammonia and CO2), creating a huge waste stream.
This waste stream has to be handled somehow – and by concentrating the ammonia and CO2 in the waste stream and integrating this stream in the feedstock to a urea plant, Stamicarbon was the first company to effectively cope with this problem. The unit we designed for the job is today called the Carbamate Concentration Unit (CCU).
Urea and melamine plants - including CCUs - are designed by Stamicarbon and built worldwide. By using our unique knowledge of both urea and melamine, we can find and implement the most effective solution for any type of coupling between a new or existing urea and melamine plant.
Such a CCU unit, for example, can be found at the DSM premises in Geleen, which connects the world’s largest single-line melamine plant to a urea plant.
