POLYMERIC DEPRESSORS OF SULFIDE MINERALS AND METHOD OF ENRICHMENT OF VALUABLE MINERALS Russian patent published in 2001 - IPC

FIELD: organic chemistry, polymers. SUBSTANCE: invention describes a composition used for suppression of sulfide minerals including repeating links of the formula (I) where each R means independently hydrogen atom or C₁C₄-alkyl group; each R¹ means independently hydrogen atom or methyl group; R² means hydrogen or C₁C₄-alkyl group; each R³ means independently hydrogen atom or C₁C₄-alkyl group; R⁴ means hydrogen atom or C₁C₄-alkyl group; each X means independently hydrogen atom or hydroxyl group under condition that at least one X is hydroxyl group; x means the mole part in the range from about 60% to about 98%; y means the mole part in the range from about 1% to about 20%; z means the mole part in the range from about 1% to about 20% and molecular mass of polymer is in the range from about 1000 to about 2000000 Da. Invention provides the development of the novel terpolymer providing the excellent enrichment of valuable minerals in combination with high level of separation of minerals of barren rock and/or separation of valuable minerals one from another. EFFECT: enhanced effectiveness of polymer. 6 cl, 4 tbl, 25 ex