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1986 Zardi UCSA 4613696 Urea Process

This patent from Mr. Umberto Zardi is his first US patent for Ammonia Casale and describes a CO2 stripper process whereby the urea solution from the reactor operated with a relatively high N/C ratio, is first decomposed in a column with a minor portion of the fresh carbon dioxide before it enters a HP CO2 stripper.

 

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