Process for liquefying natural gas and producing hydrocarbons

Details Process for liquefying natural gas and producing hydrocarbons Process for liquefying natural gas and producing hydrocarbons

2002-10-25

2008-11-18

Doerrler, William C (Department: 3744)

Refrigeration

Cryogenic treatment of gas or gas mixture

Liquefaction

C062S613000, C518S702000, C518S700000

Reexamination Certificate

active

07451618

ABSTRACT:
A process for the preparation of liquid hydrocarbons from a light hydrocarbonaceous feedstock in combination with a process for liquefying natural gas, which liquefaction process involves the steps of(a) passing the natural gas at liquefaction pressure through the product side of a main heat exchanger;(b) introducing cooled liquefied refrigerant at refrigerant pressure in the cold side of the main heat exchanger, allowing the cooled refrigerant to evaporate at the refrigerant pressure in the cold side of the main heat exchanger to obtain vaporous refrigerant at refrigerant pressure, and removing vaporous refrigerant from the cold side of the main heat exchanger;(c) removing the liquefied gas at liquefaction pressure from the product side of the main heat exchanger;(d) allowing the cooled liquefied gas to expand to a lower pressure to obtain expanded fluid;(e) supplying the expanded fluid to a separator vessel;(f) withdrawing from the bottom of the separator vessel a liquid product stream;(g) withdrawing from the top of the separator vessel a gaseous stream;(h) introducing the gaseous stream obtained in step (g) as feed and/or fuel in the process for the preparation of liquid hydrocarbons,which process for the preparation of hydrocarbons involves converting a light hydrocarbonaceous feedstock into synthesis gas, followed by catalytic conversion of the synthesis gas into liquid hydrocarbons.

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