Process for regeneration of sulfuric acid

Details Process for regeneration of sulfuric acid Process for regeneration of sulfuric acid

C - Chemistry, Metallurgy

01

B

23/115, 202/53

C01B 17/90 (2006.01)

Patent

CA 1086476

Abstract of the disclosure: The invention provides a process for the regeneration of dilute sulfuric acid containing organic impurities and possibly also inorganic salt in several steps. In the first step, the dilute acid is concentrated by indirect heat exchange with the vapors of the second step, and in the second step it is concen- trated by direct heat exchange with a countercurrent mixture of steam and acid vapors coming from a third step. In this third step, the acid discharged from the second step is mixed in direct heat exchange with superheated steam. The re- generated sulfuric acid is separated from this mixture and the remaining steam/vapor mixture is forwarded to the second step. In the case where the dilute acid contains organic substances, an oxidant is added in at least one of these process steps.

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