Hazardous or toxic waste destruction or containment – Containment – Solidification – vitrification – or cementation
Patent
1995-04-21
1996-06-18
Niebling, John
Hazardous or toxic waste destruction or containment
Containment
Solidification, vitrification, or cementation
588215, 588219, 2041574, 20415749, 2041575, 20415752, 20415821, 423531, A62D 300
Patent
active
055279856
ABSTRACT:
A process for recycling waste sulfuric acid by decomposing organic contaminants by use of light energy, comprising exposing a waste sulfuric acid containing contaminants to a focused radiation emission having an irradiation intensity within the range of from 0.01 to 100 MW/m.sup.2 in a reaction chamber shaped as a directly-absorbing receiver, wherein the chamber is maintained at a temperature within the range of from 200.degree. C. to 1000.degree. C. to form sulfur trioxide and water as sulfuric acid decomposition products. The process also includes forming sulfur dioxide and oxygen, starting materials for sulfuric acid, by cleavage of the decomposition product sulfur trioxide by maintaining the reaction chamber at a temperature between 400.degree. C. and 1500.degree. C. The process, particularly adapted for irradiations with direct solar radiation.
REFERENCES:
patent: 4042334 (1977-08-01), Matovich
patent: 4671951 (1987-06-01), Masse
Weinmann, O. et al., Thermal Recovery of Waste Sulfuric Acid with Concentrated Solar Radiation, Translation of 7 Internationales Sonnen Forum, Frankfurt, vol. 2, pp. 1076-1081 (1990).
Bohmer, M. et al., "Development of Volumetric Air Receivers", 1991 Solar World Congress, vo. 2, Part II, pp. 2123-2128 (Aug., 1991).
Becker, M. and Vant-Hull, L. L., "Thermal Receivers", Solar Power Plants, Chapter 5, pp. 162-167 and 184-191 (1991).
Funken Karl-Heinz
Knoche Karl-Friedrich
Sizmann Rudolf
Weinmann Oliver
Delacroix-Muirheid C.
Deutsche Forschungsanstalt fur Luft-und Raumfahrt e.V.
Niebling John
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