PROCESS OF REMOVING SULFUR FROM MAGNETITE CONCENTRATES VIA FLOTATION TREATMENT Russian patent published in 2007 - IPC B03D1/02 

FIELD: mineral dressing.

SUBSTANCE: process comprises crushing, conditioning with acid, ionic sulfur-containing collector, and modifying reagent, and flotation leading to isolation of sulfides into foamed product, said modifying reagent being a composition containing 80.0-99.0% isoalkenylacetylenic alcohols C₈-C₁₀ having general formula RCH=CR'C≡C-C(CH₂R")(CH₃)OH, 0-20% diisoalkenylacetylenes C₈-C₁₀ having general formula RCH=CR'C≡C-C(CH₂R")=CHR"', 0-5.0% α-acetylenic γ-diols C8-C10 having general formula (RCH₂)(CH₃)C(OH)-C≡C-C(CH₂R")(CH₃)OH, and 0-1.0% radical polymerization inhibitor. In presented formulas: R=H, CH₃; R' = CH₃, C₂H₅; R" = H, CH₃; and R"' = H, CH₃.

EFFECT: enlarged choice of modifying reagents.

1 tbl, 3 ex