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US 4,693,731 AGranted
Removal of mercury from gases
AssigneeThe M. W. Kellogg Company
InventorsRamanathan R. Tarakad, Duffer B. Crawford
Life of this patent
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Abstract
Mercury is removed from natural gas by contacting the gas with a relatively mercury-free liquid state hydrocarbon and recovering a mercury-lean methane-rich gas and a mercury-enriched hydrocarbon liquid. The mercury-free hydrocarbon liquid may be obtained by separation of mercury from the mercury-enriched hydrocarbon liquid or its derivative streams.
Claims14
A process for removing mercury from a natural gas stream which comprises:
- (a) contacting the natural gas stream in a gas/liquid contacting zone with a first mercury-free hydrocarbon liquid having a molecular weight between 20 and 130;
- (b) recovering a mercury-enriched hydrocarbon liquid from the gas/liquid contacting zone;
- and
- (c) recovering a mercury-lean methane-rich gas from the gas/liquid contacting zone;
- (d) recovering mercury from at least a portion of the mercury enriched hydrocarbon liquid.
2 more elements
Dependencies are inferred from the claim text.