Process of producing sulfuric acid

Details Process of producing sulfuric acid Process of producing sulfuric acid

C - Chemistry, Metallurgy

01

B

C01B 17/775 (2006.01)

Patent

CA 2259939

A catalytic SO2 oxidation produces a mixture of gases containing SO3 and H2O in a molar ratio of at least 1:1, and having a temperature of 300 °C to 600 °C. The mixture of gases is passed through a condenser, in which the mixture is cooled indirectly by a cooling fluid to a condenser outlet temperature of 180 °C to 240 °C. At least 50 % of the theoretically possible amount of sulphuric acid is formed, condensed and drawn off. The cooling fluid drawn off from the condenser has been heated to a temperature of at least 130 °C, so that its energy content can be utilized. The gas mixture containing sulphur trioxide that is drawn off from the condenser is brought into direct contact with concentrated sulphuric acid at 60 °C to 120 °C, generating concentrated product sulphuric acid.

L'oxydation catalytique de SO>2< donne un mélange gazeux contenant du SO>3< et du H>2<O dans un rapport molaire d'au moins 1:1, et ayant une température de 300 DEG C à 600 DEG C. Ce mélange gazeux passe par un condenseur dans lequel il est refroidi indirectement par un fluide de refroidissement jusqu'à une température en sortie du condenseur comprise entre 180 et 240 DEG C. Au moins 50 % de la quantité théoriquement possible d'acide sulfurique est formée, condensée et extraite. Le fluide de refroidissement évacué du condenseur est chauffé à une température d'au moins 130 DEG C afin que son contenu énergétique puisse être mis à profit. Le mélange gazeux contenant du SO>3<, extrait du condenseur, est mis en contact direct avec de l'acide sulfurique concentré à une température de 60 DEG à 120 DEG C, ce qui permet d'obtenir de l'acide sulfurique industriel concentré.

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