Fluoride removal from sulphuric acid

C - Chemistry – Metallurgy – 01 – B

Patent

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C01B 17/90 (2006.01) B01D 53/34 (2006.01)

Patent

CA 2031229

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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