Method and installation for producing treated natural gas, a...

Details Method and installation for producing treated natural gas, a... Method and installation for producing treated natural gas, a...

2005-12-21

2008-12-02

Doerrler, William C (Department: 3744)

Refrigeration

Cryogenic treatment of gas or gas mixture

Separation of gas mixture

C062S628000, C062S630000

Reexamination Certificate

active

07458232

ABSTRACT:
This method comprises the cooling of the initial natural gas and its introduction into a column for recovering C2+hydrocarbons. It comprises the recovery of the top stream from the column to form the treated natural gas, and the recovery of the bottom stream from the column for introducing it at a feed level of a fractionating column equipped with a top condenser. The column produces the said C3+hydrocarbons at the bottom. The method comprises the recovery of the ethane rich stream from an intermediate level of the column located above the said feed level and the production of a secondary reflux stream from the said top condenser refluxed to the top of the recovery column.

REFERENCES:
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patent: 7051553 (2006-05-01), Mak et al.
patent: 2003/0029190 (2003-02-01), Trebble
Pitman R. N. et al. “Next generation processes for NGL/LPG Recovery”.
French Searc Report FR0413751 dated Jul. 15, 2005.

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