Process and equipment for the hydrolysis of residual urea in the water from synthesis plants
US5399755A · kind A · utility
9Cited by
4References
9Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Oct 23, 1992 |
| Grant date | Mar 21, 1995 |
| Priority date | — |
| Expiry date | Oct 23, 2012 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01J2219/00777
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
Process for the hydrolysis of urea contained in the process water from plants for the synthesis of urea consisting of the thermic treatment of the water containing urea and of the removal by stripping of the compounds from decomposition of the urea (CO.sub.2 and NH.sub.3) in a series of stages in series with superimposed flow. The equipment is a vertical column with superimposed modules with weirs which penetrate in two successive modules and give the solution a rising movement.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.