Method for the separation of impurities from a hot synthesis gas mixture in the preparation of melamine
US5716429A · kind A · utility
2Cited by
6References
8Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 26, 1996 |
| Grant date | Feb 10, 1998 |
| Priority date | — |
| Expiry date | Aug 26, 2016 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01D39/2044
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
Disclosed is an improved method for separating impurities from a hot synthesis gas mixture which is obtained in the preparation of melamine and urea. The improved separation is achieved by use of filters made of sintered, essentially pure chromium, molybdenum, tungsten, or a mixture of any of these elements.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.