C - Chemistry – Metallurgy – 01 – B
Patent
C - Chemistry, Metallurgy
01
B
23/116, 23/387
C01B 17/88 (2006.01) C01B 17/90 (2006.01)
Patent
CA 1244228
ABSTRACT OF THE DISCLOSURE Diluted and contaminated sulfuric acid is subjected to an evaporation process. In a container, concentrate and vapors are separated from each other. The acid to be processed is introduced, if desired after the addition of an oxidant, at a relatively large distance from the point of separation of concentrate and vapors into a circulation conduit leading away from the concentrate zone of the container, this conduit returning via a heat exchanger into the vapor zone of the container. Concentrated and purified sulfuric acid is removed from the concentrate zone of this apparatus, and a portion of this sulfuric acid is utilized, after being diluted with water, for the rectification of the vapors in a countercurrent mode, and then recycled into the container. The process is suitable for concentration and, if desired, for its purification of sulfuric acids having contaminations which could lead, in the conventional processes, to decompositions, froth formation, and/or solid deposits.
447056
Forter Hansruedi
Kung Hans R.
Reimann Peter
Bertrams Ag
Mccarthy Tetrault Llp
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