Method and installation for the liquefaction of natural gas
US5701761A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 3, 1996 |
| Grant date | Dec 30, 1997 |
| Priority date | — |
| Expiry date | Jun 3, 2016 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF25J2220/64
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A pressurized natural gas is liquefied through at least one cooling cycle, in which a mixture of cooling fluids is used, comprising at least the following steps: PA0 a) at least some of the said cooling mixture is condensed by compression and cooling, for example, using an external cooling fluid to obtain at least one vapor fraction and one liquid fraction, PA0 b) at least some of each of the vapor and liquid fractions is expanded separately to obtain a light fluid M1 comprising mostly a vapor phase and a heavy fluid M2 comprising mostly a liquid phase, PA0 c) the fluids M1 and M2 are at least partially mixed to obtain a low-temperature mixture, and PA0 d) the natural gas is liquified and undercooled under pressure by a process of heat exchange with the low-temperature mixture produced during step c).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.