Chemistry of inorganic compounds – Sulfur or compound thereof – Oxygen containing
Patent
1977-04-19
1978-11-14
Thomas, Earl C.
Chemistry of inorganic compounds
Sulfur or compound thereof
Oxygen containing
423531, 23294R, C01B 1772, C01B 1790, B01D 700
Patent
active
041255968
ABSTRACT:
The method of preparing sulphuric acid comprises distilling sulphur trioxide with subsequent sublimation condensation by cooling with a coolant having a temperature of from -5.degree. to -15.degree. C. The obtained sulphur trioxide is then treated with sulphuric acid having a concentration in the range of 95 to 96 per cent. The thus prepared sulphuric acid contains impurities in the range of 10.sup.-7 - 10.sup.-8 per cent by weight of cations, and 5.times.10.sup.-5 per cent by weight of anions, SO.sub.3 " in particular.
REFERENCES:
patent: 3232705 (1966-02-01), Klingler et al.
patent: 3294650 (1966-12-01), Manteufel
patent: 3992159 (1976-11-01), Mitchell
Wilke, C. R., Sublimation its Application in Chemical Processing, Chemical Industries, Jul. 1948, pp. 34-38, 122, 123.
Aronov Alexandr R.
Bljum Grigory Z.
Galchina Natalya I.
Golub Alexandr E.
Naida Tatyana B.
Straub Gary P.
Thomas Earl C.
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