Process for the purification of sulfuric acid by-product from bo

Details Process for the purification of sulfuric acid by-product from bo Process for the purification of sulfuric acid by-product from bo

1983-11-17

1985-05-28

Wyse, Thomas

Chemistry of inorganic compounds

Sulfur or compound thereof

Oxygen containing

423293, 423489, C01B 1790

Patent

active

045200068

ABSTRACT:
A process for the purification of by-product sulfuric acid resulting from the synthesis of boron trifluoride, wherein the ratio of fluorine to boron is three or more, which process comprises entraining the by-product acid in an inert gas, the process being characterized in that before entrainment the anhydrous sulfuric acid is diluted with water in a proportion of from about one to about ten percent by weight of water with respect to the acid to be treated, the temperature being maintained above 90.degree. C., the sulfuric acid obtained containing less than 0.003% fluorine and less than 0.005% boron, so that the quality is substantially equivalent to a sulfuric acid directly obtained by the oxidation of sulfur.

REFERENCES:
patent: 3140244 (1964-07-01), Simek et al.
patent: 3617209 (1971-11-01), Massonne et al.
patent: 3956373 (1976-05-01), Knobloch
patent: 4265871 (1981-05-01), Felice et al.

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