Process for the synthesis of urea
US11643387B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 9, 2020 |
| Grant date | May 9, 2023 |
| Priority date | — |
| Expiry date | Jun 9, 2040 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02P20/582
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
A process for synthesis of urea from ammonia and carbon dioxide comprising the synthesis of urea in parallel in a first urea reactor (1) at a first urea synthesis pressure and in a second urea reactor (2) at a second and lower urea synthesis pressure; a stripping step of the reaction effluent of the first reactor, which is performed in a stripper (4) operating at a stripping pressure lower than the first urea synthesis pressure; the reaction effluent (21) of the second reactor (2) and the stripper liquid effluent (11) are sent to a recovery section (13) where a carbamate-containing recycle solution (17) is produced, and said recycle solution (17) is sent partly to said first reactor and partly to said second reactor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.