Use of manganese dioxide absorbent in treating waste gases

Details Use of manganese dioxide absorbent in treating waste gases Use of manganese dioxide absorbent in treating waste gases

1978-10-03

1979-08-14

Peters, G. O.

Chemistry of inorganic compounds

Modifying or removing component of normally gaseous mixture

Nitrogen or nitrogenous component

423 49, 423244, 423395, 423605, 423DIG4, 423DIG14, B01D 5334

Patent

active

041645456

ABSTRACT:
A system for treating waste gas in which the waste gas is contacted with an absorbent which contains manganese dioxide; thereafter contacting the absorbent with water to solubilize salts of manganese with an acidic ion exchange resin that retains manganese and passes acids formed from manganese salts; contacting the ion exchange resin and contained manganese with dilute nitric acid to obtain Mn(NO.sub.3).sub.2 solution; and precipitating MnO.sub.2 from the Mn(NO.sub.3).sub.2 solution.

REFERENCES:
patent: 1266731 (1918-05-01), Westby
patent: 3150923 (1964-09-01), Bienstock et al.
patent: 3330096 (1967-07-01), Zimmerly
patent: 3780158 (1973-12-01), Welsh
patent: 3975498 (1976-08-01), Miyazaki et al.
Kainz et al., "Mikrochemica Acta" (Vienna), 1962, pp. 241-248.
Herve; D., "Industrie Minerale" vol. 3, 1977, (France), pp. 173-180.

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