Process for removing nox from nitrosylsulphuric acid

Details Process for removing nox from nitrosylsulphuric acid Process for removing nox from nitrosylsulphuric acid

C - Chemistry, Metallurgy

01

B

C01B 21/093 (2006.01) C01B 17/74 (2006.01) C01B 17/94 (2006.01) C01B 21/20 (2006.01)

Patent

CA 2260816

Nitrosylsulphuric acid is mixed in a mixing reactor with sulphuric acid saturated with SO2. The acid mixture is led into a saturating reactor into the bottom region of which water and an SO2-containing gas are introduced. The gas partially serves as stripping gas inside the saturating reactor. SO2-saturated, NO x-free sulphuric acid with 5 to 60 wt % H2SO4 is removed from the bottom region of the saturating reactor and part thereof is mixed with nitrosylsulphuric acid in the mixing reactor.

L'acide nitrosylsulfurique est mélangé dans un réacteur mélangeur avec de l'acide sulfurique saturé de SO>2<. Le mélange d'acides est conduit jusqu'à un réacteur de saturation dans lequel pénètrent, par sa région inférieure, de l'eau et un gaz qui contient du SO>2<. Ce gaz sert partiellement de gaz de lavage dans le réacteur de saturation. L'acide sulfurique saturé de SO>2,<, exempt de NO>x< et contenant de 5 à 60 % en poids de H>2<SO>4<, est enlevé du réacteur de saturation par sa région inférieure et une partie de cet acide est mélangé à l'acide nitrosylsulfurique dans le réacteur mélangeur.

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