Combined process for the production of urea and ammonia
US4291006A · kind A · utility
11Cited by
3References
7Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 20, 1979 |
| Grant date | Sep 22, 1981 |
| Priority date | — |
| Expiry date | Jul 20, 1999 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02P20/52
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
In an integrated or combined process for the production of ammonia and urea, the improvement consisting in that the absorption of CO.sub.2 from the raw gas going to the synthesis reactor for ammonia is carried out with an absorption apparatus which is divided into two sections, one being of the plate type and the other of the thin film type. The predominant fraction of CO.sub.2 is stripped in the thin-film section, the remainder in the adiabatic plate section.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.