Process for urea production and related plant
US7608735B2 · kind B2 · utility
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7Claims
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Key dates
| Filing date | Apr 6, 2006 |
| Grant date | Oct 27, 2009 |
| Priority date | — |
| Expiry date | Sep 10, 2026 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C273/04
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
A process for urea production from ammonia and carbon dioxide, in which part of the aqueous solution comprising urea, ammonium carbamate and ammonia obtained in a urea synthesis section is subjected to dissociation in a treatment section operating at a predetermined medium pressure for the recovery of the ammonium carbamate and of the ammonia contained in it, comprises the step of subjecting the urea aqueous solution resulting from the aforementioned dissociation step to decomposition in a low pressure urea recovery section.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.