【摘 要】
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Extraction of chromate ions from wastewater by tri-alkylamine(R3N) dissolved in kerosene was studied at 2560℃. 1-Octanol was used as the modifier to remove the
【机 构】
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Department of Chemical Engineering
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Extraction of chromate ions from wastewater by tri-alkylamine(R3N) dissolved in kerosene was studied at 2560℃. 1-Octanol was used as the modifier to remove the third phase. The aqueous phase was a sulfuric acid solution of Cr(Ⅵ) in the concentration range commonly encountered in the galvanizing industry, namely about 2.0 mol/L. Measurement of equilibrium behavior of Cr(Ⅵ) was carried out over wide concentration ranges of amine, Cr2O2-7 and 1-octanol. Experimental results showed that the proper temperatures for extraction are 2540℃, the [H+] of the aqueous phase is 2 mol/L, and the solvent composition is 30% R3N, 64% kerosene, and 6% 1-octanol. Prediction and optimization of solvent extraction plant performance for variable industrial feed conditions are then possible. The influence of 1-octanol as the modifier to remove the third phase was also studied.
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