Fluoride removal from sulphuric acid

Details Fluoride removal from sulphuric acid Fluoride removal from sulphuric acid

1993-09-07

1994-06-28

Straub, Gary P.

Chemistry of inorganic compounds

Sulfur or compound thereof

Oxygen containing

C01B 1790

Patent

active

053244990

ABSTRACT:
A process for the reduction in fluoride concentration in a fluoride-contaminated sulphuric acid which process comprises treating said sulphuric acid with a silicon compound to produce silicon tetrafluoride, and removing said silicon tetrafluoride to produce a purer sulphuric acid having a substantially reduced fluoride concentration. The process is of particular use for the removal of fluoride from waste sulphuric acid in the copper smelting industry to meet environmental concerns.

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patent: 4138231 (1979-02-01), Hedenas et al.
patent: 4781909 (1988-01-01), Evans et al.

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