Process for the cryogenic separation of gases from air
US6257020A · kind A · utility
7Cited by
6References
37Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Dec 17, 1999 |
| Grant date | Jul 10, 2001 |
| Priority date | — |
| Expiry date | Dec 17, 2019 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF25J2290/10
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
In an apparatus for the separation of air by cryogenic distillation, all of the air is compressed to a medium pressure. Next, one part of the air is compressed to an intermediate pressure and a fraction of this air is compressed to a high pressure. The high-pressure air is divided into at least two fractions and expanded in two turboexpanders, the cooled stream from the warm turboexpander being at least partially recycled into the warm end of the exchanger at a higher pressure. A liquid coming from the air separation apparatus vaporizes in the exchanger.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.