Process for the purification-sweetening of natural gas by...

B - Operations – Transporting – 01 – D

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B01D 53/14 (2006.01) C10L 3/10 (2006.01)

Patent

CA 2732942

A process for reducing and/or removing sour gases, such as carbon dioxide and hydrogen sulfide, from natural gas or from gas associated with oil reservoirs, by means of the formation of mixed hydrates, wherein a selective separation is carried out both during the hydrates decomposition, under pressure conditions close to atmospheric pressure and temperatures little below zero, and, preferably, during a preliminary step, with pressures and temperatures close to the equilibrium values.

L'invention porte sur un procédé pour la réduction et/ou l'élimination de gaz corrosifs, tels que le dioxyde de carbone et le sulfure d'hydrogène, à partir de gaz naturel ou à partir de gaz associé à des réservoirs de pétrole, au moyen de la formation d'hydrates mixtes, une séparation sélective étant effectuée à la fois au cours de la décomposition des hydrates, dans des conditions de pression proches de la pression atmosphérique et à des températures un peu au-dessous de zéro et, de préférence, au cours d'une étape préliminaire, avec des pressions et des températures proches des valeurs d'équilibre.

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