Flexible hydrocarbon gas separation process and apparatus

Details Flexible hydrocarbon gas separation process and apparatus Flexible hydrocarbon gas separation process and apparatus

2007-03-05

2010-12-28

Tyler, Cheryl J (Department: 3784)

Refrigeration

Cryogenic treatment of gas or gas mixture

Separation of gas mixture

C062S630000, C062S631000

Reexamination Certificate

active

07856848

ABSTRACT:
The present invention related to a flexible hydrocarbon gas separation process that could dehydrate the water-saturated hydrocarbon gas mixture and recover thereof the required higher hydrocarbons (NGL) therein with a controllable ethane recovery rate (ranging from >95% to <2%) while keeping high recovery rate of all other heavier components. The flexible process comprises the following steps: deep-cooling and dehydrating the raw gas and get the NGL condensate; flowing the deep-dehydrated gas into the flexible absorber to get the rich oil with desirable ethane content; completely demethanizing and partially deethanizing as desired the rich oil and the NGL condensate to get purified rich oil and purified NGL condensate, respectively; separating the NGL vapor from the purified rich oil; cooling and compressing the NGL vapor; mixing the NGL vapor with the purified NGL condensate; and liquefying the mixture to get the final NGL product. The present invention also provides a flexible apparatus with highly efficient components for the flexible process.

REFERENCES:
patent: 2868326 (1959-01-01), Gilmore
patent: 4435198 (1984-03-01), Gray
patent: 5664426 (1997-09-01), Lu
patent: 6553784 (2003-04-01), Lu
patent: 2003/0014995 (2003-01-01), Bowen et al.
patent: 2003/0033827 (2003-02-01), Lu

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