Process for producing low-biuret urea
AssigneeCasale SA
InventorsLeonardo Marrone, Alberto Benedetti, Paolo Bertini
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Abstract
A process for purifying a urea-containing aqueous stream, such as the aqueous stream from the recovery section of a urea plant, comprising a step of removing biuret from the urea-containing stream by reverse osmosis in one or more reverse osmosis stages.
Claims21
A process for purifying a urea-containing aqueous stream comprising a step of removing biuret from the urea-containing stream by reverse osmosis, wherein the urea-containing stream is an aqueous solution of urea obtained from a recovery section of a urea plant, said process comprising a step of performing the reverse osmosis with reverse osmosis stages in a cascade.
Dependencies are inferred from the claim text.