Process and plant for the production of urea with differentiated yield reaction spaces
US5380943A · kind A · utility
4Cited by
4References
12Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 16, 1992 |
| Grant date | Jan 10, 1995 |
| Priority date | — |
| Expiry date | Sep 16, 2012 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02P20/582
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
Process for the industrial synthesis of urea, by reacting ammonia (NH.sub.3) and carbon dioxide (CO.sub.2) in at least one reaction space, at high pressures and temperatures and by recirculating at least part of the non-reacted products obtained in a recovery section, characterized by the fact that the following takes place : a synthesis reaction A) between highly pure reagents, and a synthesis reaction B) between less pure reagents, substantially recycled from the said recovery section, the reaction A) being either of adiabatic type A1) or with partial reaction heat removal A2).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.