Process for integrated production of urea and urea-ammonium nitrate
US10550075B2 · kind B2 · utility
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19Claims
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Key dates
| Filing date | Sep 4, 2017 |
| Grant date | Feb 4, 2020 |
| Priority date | — |
| Expiry date | Sep 4, 2037 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02P20/141
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
Integrated process for the production of urea and urea-ammonium nitrate, comprising: reacting ammonia and carbon dioxide to form a reaction mixture (4) containing urea and unconverted materials, and also comprising the recovery of unconverted materials in a first recovery stage at a first pressure and in a second recovery stage at a second pressure, wherein ammonia-containing offgas (19) released by said second recovery stage are condensed at said second pressure, and said condensed offgas (20) are recycled to said first recovery stage.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.