Method for nitrogen rejection and or helium recovery in an LNG liquefaction plant
US8522574B2 · kind B2 · utility
9Cited by
13References
20Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 31, 2008 |
| Grant date | Sep 3, 2013 |
| Priority date | — |
| Expiry date | Oct 3, 2031 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF25J2270/04
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
Methods of reducing the concentration of low boiling point components in liquefied natural gas are disclosed. The methods involve dynamic decompression of the liquefied natural gas and one or more pre-fractionation vessels. Particular embodiments are suited for recovering helium and/or nitrogen enriched streams from a liquefied natural gas stream.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.