Christopher J Ott

US Patent:

20170284737, Oct 5, 2017

Filed:

Jun 19, 2017

Appl. No.:

15/626301

Inventors:

- Allentown PA, US
Yang Liu - Springfield NJ, US
Gowri Krishnamurthy - Sellersville PA, US
Christopher Michael Ott - Macungie PA, US
Mark Julian Roberts - Kempton PA, US

Assignee:

AIR PRODUCTS AND CHEMICALS, INC. - Allentown PA

International Classification:

F25J 3/06
F25J 1/02
F25J 3/02
F25J 1/00

Abstract:

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a natural gas feed stream is fed into the warm end of a main heat exchanger, cooled and at least partially liquefied, withdrawn from an intermediate location of the main heat exchanger and separated to form a nitrogen-enriched natural gas vapor stream and a nitrogen-depleted natural gas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.