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将工厂提钾后的盐湖卤水作为提取Rb+和Cs+的实验用卤水,将萃取剂t-BAMBP的磺化煤油溶液作为有机相进行萃取。在萃取之前预先沉淀出镁并作为一种产品,在反萃前再多次洗涤分离出大部分的K+和Na+,最终使Rb+和Cs+得到有效富集和分离。研究油水相比(O/A)、水相的碱性(c(OH-)、K+和Mg2+的含量及洗涤油水相比(O/A′)对萃取过程的影响。最佳工艺条件为:1.0 mol/L的t-BAMBP磺化煤油溶液,水相碱性c(OH-)=1 mol/L,油水相比O/A=1:1。当用1×10-4 mol/L Na OH溶液洗涤萃取油相3次,洗涤油水相比O/A′=1:0.5时,铷和铯的洗脱率仅为10.5%。经过5级逆流萃取,最终铷和铯的萃取率分别达到了95.04%与99.80%。
Salt water brine extracted from the factory was used as experimental brine for extraction of Rb + and Cs +, and the sulfonated kerosene solution of extractant t-BAMBP was extracted as the organic phase. Precipitation of magnesium prior to extraction and as a product followed by multiple washings prior to stripping to separate most of the K + and Na + results in efficient enrichment and separation of Rb + and Cs +. The effects of oil / water ratio (O / A), alkaline (c (OH -)), K + and Mg2 + contents and O / A ratio on the extraction process were investigated. 1.0 mol / L t-BAMBP sulfonated kerosene solution, aqueous alkaline c (OH -) = 1 mol / L and oil / water ratio O / A = 1: 1. When using 1 × 10-4 mol / L Na OH solution was used to wash the oil phase three times, and the elution rate of rubidium and cesium was only 10.5% when the washing oil-water ratio was 0: 0.5, and the final extraction rate of rubidium and cesium reached respectively 95.04% and 99.80% respectively.