Integrated nitrogen removal in the production of liquefied natural gas using intermediate feed gas separation

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United States of America Patent

PATENT NO 10767922
APP PUB NO 20170284737A1
SERIAL NO

15626301

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Abstract

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A method and apparatus for liquefying a natural gas feed stream and removing nitrogen therefrom to produce a nitrogen-depleted LNG product, in which a natural gas feed stream is fed into the warm end of a main heat exchanger, cooled and at least partially liquefied, withdrawn from an intermediate location of the main heat exchanger and separated to form a nitrogen-enriched natural gas vapor stream and a nitrogen-depleted natural gas liquid stream, the liquid and vapor streams being reintroduced into an intermediate location of the main heat exchanger and further cooled in parallel to form a first LNG stream and a first at least partially liquefied nitrogen-enriched natural gas stream, respectively.

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Patent Owner(s)

Patent OwnerAddress
AIR PRODUCTS AND CHEMICALS INC1940 AIR PRODUCTS BOULEVARD PATENT DEPT ALLENTOWN PA 18106-5500

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Chen, Fei Whitehouse Station, US 261 1790
Krishnamurthy, Gowri Sellersville, US 31 78
Liu, Yang Springfield, US 1671 6447
Ott, Christopher Michael Macungie, US 17 92
Roberts, Mark Julian Kempton, US 73 847

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