Recovering natural gas liquids from LNG using vacuum...

Details Recovering natural gas liquids from LNG using vacuum... Recovering natural gas liquids from LNG using vacuum...

2007-06-26

2007-06-26

Doerrler, William C. (Department: 3744)

Refrigeration

Cryogenic treatment of gas or gas mixture

Separation of gas mixture

C062S630000

Reexamination Certificate

active

11211278

ABSTRACT:
A process for recovering liquefied C3compounds from a natural gas stream containing C3compounds which comprises (a) chilling the natural gas stream under conditions sufficient to liquefy the natural gas, whereby a mixture comprising liquid natural gas (LNG) and liquid C3compounds is formed; (b) fractionating the mixture comprising liquid natural gas (LNG) and liquid C3compounds in a separation zone under sub-atmospheric pressure and under conditions predetermined to vaporize a significant portion of the natural gas present while retaining the C3compounds as a liquid fraction; and (c) recovering separately from the separation zone natural gas and liquid C3compounds.

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