Arsenic Sulfide → Sulfuric Acid

Reaktionsgleichung

[As].[OH:2][O:3][S:4]([OH:7])(=[O:6])=[O:5].[S-2].[S-2].[S-2].[As+3].[As+3]>[Au].O>[OH:2][O:3][S:4]([OH:7])(=[O:6])=[O:5].[S:4](=[O:5])(=[O:3])([OH:7])[OH:6].[OH:2][OH:3]

Komponenten

Edukt 3

HCID 61569Arsenic Sulfide

HCID 2754594Peroxymonosulfuric acid2×

HCID 5359596Arsenic

Produkt 3

HCID 784Hydrogen PeroxideAusbeute 50 %

HCID 1118Sulfuric AcidAusbeute 92 %

HCID 2754594Peroxymonosulfuric acid

Reagenzien, Katalysatoren, Lösungsmittel 2

Versuchsvorschrift

In the process of the invention, the arsenic-containing gold ore is treated with Caro's acid, i.e. peroxymonosulphuric acid (H2SO5), to oxidize the arsenic sulfide in the ore to the water soluble arsenate form. Caro's acid is produced by reaction between 92 to 99% sulphuric acid and 50 to 75% aqueous hydrogen peroxide in a mole ratio of 1.5:1 to 3.5:1. The acid may be diluted with water for use in this invention, and usually has a concentration in the range of about 15 to about 30%.