Process for the concentration of sulphuric acid containing...

Details Process for the concentration of sulphuric acid containing... Process for the concentration of sulphuric acid containing...

C - Chemistry, Metallurgy

01

B

23/114

C01B 17/90 (2006.01) C01B 17/88 (2006.01)

Patent

CA 2023688

Process for the Concentration of Sulphuric Acid containing Metal Sulphates ABSTRACT OF THE DISCLOSURE A process for the recovery of sulphuric acid from waste acids containing metal sulphates by evaporative concentration and separation of the metal sulphates from the suspension obtained by evaporation, the improvement wherein vapors leaving the evaporators together with droplets of sulphuric acid containing metal sulphates and solid metal sulphates are condensed by direct contact with cooled contaminated vapor con- densate, cooling of this vapor condensate which is cir- culated as cooling medium is carried out in a flash evaporator and the vapors leaving the flash evaporator free from metal sulphates and sulphuric acid are directly or indirectly condensed by means of cooling agent. Le A 27 172

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