Apparatus for carbamate decomposition and ammonia and carbon dioxide stripping from urea solutions capable of 180 degree inversion about a horizontal axis
US6926869B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Oct 5, 2001 |
| Grant date | Aug 9, 2005 |
| Priority date | — |
| Expiry date | Dec 15, 2022 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01J2219/185
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
An apparatus (1) for carbamate decomposition and ammonia and carbon dioxide stripping from urea solutions, wherein a stripper (2) including a substantially cylindrical shell (3), which can be fitted onto a structure (6) for supporting the shell (3) in two distinct vertical positions rotated by 180 ° with respect to a horizontal symmetry axis (x-x) of the stripper. By virtue of the symmetrical design of stripper (2), the operation and the associated connections of the upper and lower portions are effectively interchangeable, thereby providing a substantial increase in the service life of the stripper when the stripper is rotated so as to bring a corrosion damaged upper part down, at the bottom of the apparatus, and bring the opposed, not yet damaged corresponding area up.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.