Process for the concentration of sulphuric acid containing metal

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

1990-08-01

1991-10-29

Straub, Gary P.

Chemistry of inorganic compounds

Sulfur or compound thereof

Oxygen containing

423522, 423DIG2, 159 471, C01B 1790, B01D 100

Patent

active

050614720

ABSTRACT:
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 condensate, cooling of this vapor condensate which is circulated 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.

REFERENCES:
patent: 3948624 (1976-04-01), Fornoff et al.
patent: 4157381 (1979-06-01), Bodenbenner et al.
patent: 4194952 (1980-03-01), Bodenbenner et al.

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