METHOD AND AN APPARATUS FOR NGL/GPL RECOVERY FROM A HYDROCARBON GAS, IN PARTICULAR FROM NATURAL GAS
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United States of America Patent
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Issued Date -
Feb 7, 2013
app pub date -
Mar 30, 2011
filing date -
Mar 29, 2010
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Abstract
A method for separating methane from at least one hydrocarbon with two or more carbon atoms in a substantially gaseous fluid, containing more than 3 ppm of water, in particular a natural gas coming from a natural gas field or from a natural gas pipeline, or a refinery gas or another gas available at an extraction pressure set between 15 and 300 bar, and an apparatus. The method provides prearranging an expansion device having at least one first expansion equipment, selected from the group comprised of: a radial expansion device and a static expansion device, in which a first expansion takes place with a cooling effect down to a temperature that is higher than the solid formation temperature that may be formed starting from water and/or hydrocarbons present in said gas, and further having at least one second expansion equipment which is arranged downstream of the first expansion equipment.
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