Gas liquefaction method and apparatus
US4758257A · kind A · utility
11Cited by
9References
14Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 1, 1987 |
| Grant date | Jul 19, 1988 |
| Priority date | — |
| Expiry date | May 1, 2007 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF25J2270/16
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A stream of compressed nitrogen (or methane) at above its critical pressure is passed along conduit 10 through heat exchangers 16, 18, 20, 22 and 24, in sequence, to cool it to below its critical temperature. The resulting fluid is then subjected to expansion and resultant liquid is collected. Refrigeration for the heat exchangers is provided by nitrogen working fluid cycles 62, 72 and 82 employing expansion turbines 64, 74 and 84 respectively. The turbines have different inlet temperatures but substantially the same outlet temperature.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.