Method for denitrogenation of natural gas with or without helium recovery
US10006699B2 · kind B2 · utility
1Cited by
8References
12Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 14, 2014 |
| Grant date | Jun 26, 2018 |
| Priority date | — |
| Expiry date | Oct 14, 2034 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF25J2240/40
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
The invention relates to a method for denitrogenation of natural gas by distillation, in which natural gas cooled in an exchange line is separated in a system of columns including at least one column, a nitrogen-enriched gas is drawn from one column of the system of columns and is heated in the exchange line, a methane-enriched liquid is drawn from one column of the system of columns, pressurized and vaporized in the exchange line at at least one vaporization pressure, and at least one portion of the cooled natural gas expands in gaseous form in a turbine and is sent to one column of the system of columns in gaseous form.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.