Purification and reconcentration of waste sulphuric acid

Chemistry of inorganic compounds – Sulfur or compound thereof – Oxygen containing

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423522, 20415743, 20415749, 219 1055M, 219 1057, C01B 1790, C01B 1758, H05B 664

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active

046719512

ABSTRACT:
This invention relates to a process for the production of concentrated sulphuric acid from waste sulphuric acid which comprises subjecting said waste acid to microwave energy for a sufficient period of time to effect production of water vapor, whereby said waste acid is concentrated to a desired degree; removing said water vapor; and collecting said concentrated acid.

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Kirk Othmer, Encyclopedia of Chemical Technology, Third Edition, 1981, John Wiley & Sons, N.Y., N.Y., pp. 494-498, 516-517.
Kuckhowski et al, Microwave Spectrum, Structure and Dipole Moment of Sulfuric Acid, J. Am. Chem. Soc., vol. 103, No. 10, 1981, pp. 2561-2566.
Cord et al, Microwave Spectral Tables, National Bureau of Standards, Monograph 70, vol. IV, Oct. 1968, pp. 385-386.

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