Gas treatment process
US4623370A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 29, 1985 |
| Grant date | Nov 18, 1986 |
| Priority date | — |
| Expiry date | Aug 29, 2005 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S62/934
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
In a gas treatment process, a liquid tail product from a nitrogen wash column, which is typically incorporated into a process for the manufacture of ammonia from hydrocarbons, coal or other carbonaceous material, is separated in cryogenic distillation columns into product streams. Streams rich in hydrogen and carbon monoxide are available at elevated pressure and may be beneficially recycled to the ammonia manufacturing process. The process requires no external source of refrigeration and no compressor is incorporated therein. A stream of liquid nitrogen, which may typically be available in an ammonia manufacturing plant, may optionally be used and, when used, will result in improved separation in the distillation columns.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.