Process for producing magnesium sulfite hexahydrate in a...

Details Process for producing magnesium sulfite hexahydrate in a... Process for producing magnesium sulfite hexahydrate in a...

C - Chemistry, Metallurgy

01

F

C01F 5/42 (2006.01) B01D 53/14 (2006.01) B01D 53/34 (2006.01) B01D 53/50 (2006.01)

Patent

CA 2133694

A process for removing sulfur dioxide from a flue gas stream where the magnesium sulfite removed from the effluent of a wet scrubber is in the form of magnesium sulfite hexahydrate. The chemistry of the aqueous scrubbing medium is controlled with specified ranges of magnesium ion content, sulfite ion content and pH. A portion of the aqueous solution removed from the scrubber is cooled, and solids crystallized therefrom, in the form of magnesium sulfite hexahydrate.

Méthode pour éliminer du dioxyde de soufre dans un flux de gaz de carneau, où le sulfite de magnésium retiré de l'effluent d'un laveur par voie humide se trouve sous forme de sulfite de magnésium hexahydraté. La chimie du milieu de lavage aqueux est contrôlée à l'intérieur de plages spécifiées de pH et de teneurs en ion magnésium et en ion sulfite. Une fraction de la solution aqueuse retirée du laveur est refroidie, et des solides sont cristallisés à partir de cette solution sous forme de sulfite de magnésium hexahydraté.

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