Process for liquefaction of a pressurized hydrocarbon-rich fract

Details Process for liquefaction of a pressurized hydrocarbon-rich fract Process for liquefaction of a pressurized hydrocarbon-rich fract

1995-11-09

1996-12-31

Capossela, Ronald C.

Refrigeration

Cryogenic treatment of gas or gas mixture

Liquefaction

62636, 62912, F25J 100

Patent

active

055883079

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.

REFERENCES:
patent: 3878689 (1975-04-01), Grenci
patent: 4133663 (1979-01-01), Skinner
patent: 4229195 (1980-10-01), Forg
patent: 5006138 (1991-04-01), Hewitt

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