METHOD OF EXTRACTION OF CHROME (VI) ON ANIONITE AM-2B Russian patent published in 1997 - IPC

FIELD: chemical technology. SUBSTANCE: adsorption is carried out in weak acid or weak alkaline medium and pH optimal value is regulated according the following equation: ΔpH = ΔpH_o•exp(-k•t^m) where: ΔpH - pH value deviation from the assigned meaning; ΔpH_o - maximal deviation of pH value from the assigned meaning at initial time moment; k, m - constants obtaining on the basis of experimental data; t - time. The proposed method can be used in chrome compound production, analytical chemistry, for galvanic, leather sewage treatment, in ferrous and nonferrous metallurgy. EFFECT: improved method of extraction. 3 dwg , 1 tbl