LSP PROCESS FOR HIGH ETHANE RECOVERY
Publication Date: 2004-May-12
The IP.com Prior Art Database
The following article describes the LSP process (Lean-oil Subcooled Process) for recovering a purified ethane product from a high pressure, dense phase natural gas stream. The LSP process is essentially a hybrid turbo-expander/absorption process which utilizes C3+ material as light lean oil to enhance ethane recovery at cryogenic temperatures. It can achieve economic ethane recoveries as high as 97% and is particularly suited to applications where complete recovery and commercial disposal of C3+ material is not required. Pressure reduction is achieved by the use of two turbo expanders in series. This configuration allows for operation of the brazed aluminum heat exchangers at conventional pressures.