Integrated air separation/metallurgical process
US5040370A · kind A · utility
18Cited by
7References
11Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jun 6, 1990 |
| Grant date | Aug 20, 1991 |
| Priority date | — |
| Expiry date | Jun 6, 2010 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF25J2200/20
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
Air is separated into oxygen and nitrogen in rectification columns 28 and 30. A stream of nitrogen is withdrawn from the top of the column 30 through an outlet 54, is warmed to about ambient temperature by passage through heat exchangers 34, 46 and 24, and is then heated at a pressure in the range 2 to 7 atmospheres absolute by heat exchange in heat exchanger 56 with a hot stream of fluid initially at a temperature of less than 600.degree. C. without said fluid undergoing a change of phase. The resulting hot nitrogen is then expanded in turbine 58 with the performance of external work, e.g. the generation of electricity.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.