A process for treating the waste water of a urea production plant

By employing a urease enzyme to degrade urea at low temperatures and pressures, the process addresses the high steam consumption issue in urea production, achieving efficient and cost-effective waste water treatment with reduced operational costs.

WO2025218930A1PCT designated stage Publication Date: 2025-10-23CASALE SA
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Patent Information

Application Number
PCT/EP2024/088689
Authority / Receiving Office
WO · WO
Patent Type
Applications
Current Assignee / Owner
Priority Date
2024-04-18
Filing Date
2024-12-31
Publication Date
2025-10-23

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Abstract

A process for removing urea from waste water of a urea synthesis plant, comprising the step of contacting the waste water with a urease enzyme and subjecting the effluent of said contacting to steam stripping to remove ammonium salts.
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Citation Information

Patent Citations

  • Process for reducing the biuret content in urea

    US3903158A

  • Apparatus for removing contaminants in reactors

    US20030072698A1

  • Process for the in-line hydrolysis of urea

    US5240688A

  • Process and equipment for the hydrolysis of residual urea in the water from synthesis plants

    US5399755A