Adsorption trap for the detection of surface-active agents...

G - Physics – 01 – N

Patent

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G01N 1/00 (2006.01) C10C 1/20 (2006.01) G01N 7/00 (2006.01) G01N 7/10 (2006.01) G01N 19/10 (2006.01)

Patent

CA 2485955

A method and apparatus are provided for adsorbing surface-active compounds, such as corrosion inhibitors and water, from pressurized gas streams utilizing existing gas pipeline sampling valves (60). The apparatus includes an adsorption trap assembly (100) containing an adsorption material packing, such as silica gel, fixedly positioned to selectively adsorb any surface-active compound(s) or water in the gas stream passing through the trap. After sampling, the adsorption material packing is removed and treated to desorb any entrained compound(s) for recovery, testing and identification. The method and apparatus have particular utility in determining the presence of corrosion inhibitors that have been added to petroleum pipelines upstream of the sampling point(s).

L'invention porte sur un procédé et sur un appareil permettant l'adsorption de composés actifs en surface, tels que des inhibiteurs de corrosion et l'eau, à partir de courants gazeux sous pression utilisant des vannes d'échantillonnage (60) de conduites de gaz existantes. L'appareil comprend un ensemble piège d'adsorption (100) contenant un remplissage d'adsorption, tel qu'un gel de silice, positionné de manière fixe de façon à adsorber sélectivement tout composé actif en surface ou l'eau dans le courant gazeux traversant le piège. Après échantillonnage, le remplissage d'adsorption est retiré et traité pour désorber tout composé entraîné, destiné à être récupéré, testé, identifié. Le procédé et l'appareil de cette invention s'avèrent particulièrement utiles pour déterminer la présence d'inhibiteurs de corrosion qui ont été ajoutés à des conduites de pétrole an amont du ou des points d'échantillonnage.

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