Scavengers for removal of acid gases from fluid streams

Details Scavengers for removal of acid gases from fluid streams Scavengers for removal of acid gases from fluid streams

B - Operations, Transporting

01

D

B01D 53/68 (2006.01) B01J 20/04 (2006.01) C01B 31/24 (2006.01) C01D 7/00 (2006.01) C01F 7/00 (2006.01)

Patent

CA 2602752

A composite sorbent is formed which is the reaction product of a solid alkali metal carbonate, rehydratable alumina and water or an aqueous solution of a metal salt. The reaction between the components occurs while forming particulates followed by curing and activation. In one embodiment, the composite contains an appreciable amount of a Dawsonite-type hydroxycarbonate as a final product or as an intermediate in at least one of the production stages. The alkali metal in the sorbent exhibits a highly reactive and accessible state that is very favorable for various sorption applications. The sorbent is especially useful for removal of HCl and other acid contaminants from gas and liquid hydrocarbon streams. It combines a high capacity for the contaminants with a low reactivity towards the hydrocarbon components of the main stream.

La présente invention concerne un sorbant composite formé qui est le produit de réaction d'un carbonate métallique alcalin solide, d'un alumine réhydratable et d'eau ou d'une solution aqueuse d'un sel métallique. La réaction entre les composants survient lors de la formation des particules suivies d'un durcissement et d'une activation. Dans un mode de réalisation de l'invention, le composite contient une quantité appréciable d'hydroxycarbonate de type Dawsonite comme produit fini ou comme intermédiaire dans au moins une des étapes de production. Le métal alcalin dans le sorbant présente un état accessible et hautement réactif qui est très favorable pour diverses applications de sorption. Ce sorbant convient particulièrement pour éliminer HCI et d'autres impuretés acides de gaz et de flux d'hydrocarbure liquides. Il combine une haute capacité pour les impuretés avec une faible réactivité pour les composants hydrocarbure du flux principal.

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