Apparatus for the recovery of sulphuric acid from industrial was

Details Apparatus for the recovery of sulphuric acid from industrial was Apparatus for the recovery of sulphuric acid from industrial was

1975-07-24

1976-11-30

Wolk, Morris O.

Chemistry: physical processes

Physical processes

Crystallization

23284, 55 90, 55DIG30, 423522, B01J 1000, C01B 1772, C01B 1780

Patent

active

039946916

ABSTRACT:
Apparatus and method for the cryothermal recovery of sulfuric acid as predicated on the capture and conversion of sulfur dioxide contained in industrial waste gases. The apparatus includes a waste gas purifier comprising a chamber through which waste combustion gases are passed so as to traverse an ice bed filter means containing ice produced so as to contain entrained oxygen by an independent ice-making machine and chilled by the use of a cryogenic material, preferably liquid nitrogen. The incoming gases may be chilled by recirculating the gases that have passed through the ice filter bed so as to chill the portion of the chamber that is contacted by the incoming gases prior to their passage through the ice filter bed. Oxygen entrainment may be enhanced by the employment of a source of oxygen and the entrained oxygen at the low temperature provided by the ice bed reacts with sulfur dioxide contained in the waste combustion gases by transition through sulfur trioxide to sulfuric acid. The sulfuric acid is contained in melt from the ice filter bed and may be washed out with a spray of cold water.

REFERENCES:
patent: 3273316 (1966-09-01), Ross
patent: 3494099 (1970-02-01), Eng et al.

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