Chemistry of inorganic compounds – Selenium or tellurium or compound thereof – Elemental selenium or tellurium
Patent
1974-11-14
1976-06-29
Rutledge, L. Dewayne
Chemistry of inorganic compounds
Selenium or tellurium or compound thereof
Elemental selenium or tellurium
423210, 4232155, 55 72, 55 97, C01B 1900
Patent
active
039668894
ABSTRACT:
Selenium is recovered from combustion waste gas, especially the combustion waste gas evolved from glass melting furnaces by a process in which the waste gas is contacted with an absorbing solution containing an alkali metal sulfite or bisulfite, whereby metallic selenium and selenium compounds are absorbed, the temperature of the waste gas is decreased and the humidity of the waste gas is increased. The treated waste gas in then passed through a moist glass fiber filter which collects the remaining amounts of selenium from the waste gas. The absorbing solution is combined with the solution used to wash the glass fiber filter and the combined solutions are treated with an acid which reduces all of the selenium present in the solution to metallic selenium which precipitates from solution.
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Weast, R. C. ed.; Handbook of Chemistry and Physics 55 Ed. C.R.C. Press, Cleveland, Ohio, p. E-5 (1974).
Kakuta Hisashi
Matoba Shigetada
Shimizu Ken'ichi
Yamashita Satoshi
Asahi Glass Co. Ltd.
Lewis Michael L.
Rutledge L. Dewayne
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