Process for liquefaction of a pressurized hydrocarbon-rich fraction
US5588307A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Nov 9, 1995 |
| Grant date | Dec 31, 1996 |
| Priority date | — |
| Expiry date | Nov 9, 2015 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S62/912
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A pressurized hydrocarbon-rich fraction is cooled and liquefied by heat exchange with the process flows to be heated. Thereafter, the fraction is expanded in an expansion valve and introduced into a storage tank. The flash gas/boil-off gas removed from the storage tank, which optionally forms one of the process flows to be heated, is compressed in one or more stages. The throughput of the flash gas/boil-off gas compressor is kept constant at full load via the position of the expansion valve or expansion turbine controlled by means of a FIC controller. The pressure following expansion valve or expansion turbine is kept substantially constant.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.