Method for recovering LPG boil off gas using LNG as a heat transfer medium
AssigneeChevron U.S.A. Inc.
InventorMichael McCoy
Life of this patent
Estimating the term…
Abstract
A process for condensing a C3-C4 hydrocarbon vapor which comprises contacting the C3-C4 hydrocarbon vapor with a heat exchanger surface which is cooled by contact with LNG and recovering a liquefied C3-C4 product therefrom.
Claims20
A process for condensing a C3-C4 hydrocarbon vapor which comprises contacting the C3-C4 hydrocarbon vapor with a heat exchanger surface which is cooled by contact with LNG and recovering a liquefied C3-C4 product therefrom.
A method of recovering C3 boil off gas from a vessel containing liquefied C3 which comprises contacting the C3 boil off gas with a heat exchanger surface which is cooled by contact with LNG and recovering a liquefied C3 product therefrom.
A method of recovering C4 boil off gas from a vessel containing liquefied C4 which comprises contacting the C4 boil off gas with a heat exchanger surface which is cooled by contact with LNG and recovering a liquefied C4 product therefrom.
In a facility for liquefying LNG and propane which comprises an LNG liquefaction unit and a vessel for storing C3, an improved method for recovering boil off C3 gas from the vessel for storing C3 which comprises contacting the C3 boil off gas with a heat exchange surface cooled by LNG and recovering liquefied C3 from the heat exchanger.
In a facility for liquefying LNG and C4 which comprises an LNG liquefaction unit and a vessel for storing C4, an improved method for recovering boil off C4 gas from the vessel for storing C4 which comprises contacting the C4 boil off gas with a heat exchange surface cooled by LNG and recovering liquefied C4 from the heat exchanger.
Dependencies are inferred from the claim text.