SYSTEM AND METHOD TO REMOVE ACIDIC SPECIES FROM A RICH MEG STREAM BY STRIPPING

A system and method for removing acetic acid and other short chain fatty acids described as organic acid from a rich mono-ethylene glycol ("MEG") solution does so by stripping the organic acid from the rich MEG solution by contacting the solution with a gas, the gas being nitrogen or a fue...

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Bibliographische Detailangaben
Hauptverfasser:	LANGLEY, Steven, KNIGHT, David, John
Format:	Patent
Sprache:	eng ; fre ; ger
Schlagworte:	ACYCLIC OR CARBOCYCLIC COMPOUNDS CHEMISTRY METALLURGY ORGANIC CHEMISTRY PERFORMING OPERATIONS PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL SEPARATION TRANSPORTING
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Beschreibung
Zusammenfassung:	A system and method for removing acetic acid and other short chain fatty acids described as organic acid from a rich mono-ethylene glycol ("MEG") solution does so by stripping the organic acid from the rich MEG solution by contacting the solution with a gas, the gas being nitrogen or a fuel gas such as methane; and stripping the organic acid from the gas by contacting the gas with a caustic solution such as a dilute sodium hydroxide solution. The stripping steps take place in respective stripping columns. A portion of the gas exiting the gas/organic acid stripping column can be recycled to the MEG/organic acid stripping column to reduce total gas usage. A portion of the waste stream exiting the gas/organic acid stripping column can be recycled back to the gas/organic acid stripping column to reduce the amount of caustic solution used as well as the amount of waste.