In situ FT-IR (Fourier Transform Infrared Spectroscopy) Studies of Reactions of Activated Sphalerite with Aqueous Solutions of Potassium Ethylxanthate

摘要

The Bureau of Mines has used Fourier transform infrared spectroscopy (FT-IR) to study in situ reactions of aqueous solutions of potassium ethylxanthate with Cu(II)- and Pb(II)-activated sphalerite plates, in which the plates were both the infrared-transparent windows and the reacting surfaces. A copper (I) ethylxanthate formed predominantly with Cu(II)-activated sphalerite, regardless of the activation time. The products formed on Pb(II)-activated sphalerite depended on the activation times; a short activation time (30 min) yielded a lead ethylxanthate-like product, but a long activation time (90 min) yielded a considerable amount of dixanthogen.