Boron extraction by aliphatic mono- and di-hydroxy alcohols from a representative continental brine

IF 4.8 2区材料科学 Q1 METALLURGY & METALLURGICAL ENGINEERING Hydrometallurgy Pub Date : 2024-02-06 DOI:10.1016/j.hydromet.2024.106280

Abdoul Fattah Kiemde , Jérôme Marin , Victoria Flexer , Alexandre Chagnes

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引用次数: 0

Abstract

The extraction properties of mono-hydroxy alcohols (2-butyl-1-octanol, 2-ethyl-1-hexanol, 1-octanol) and di-hydroxy alcohols (2-ethyl-1,3-hexanediol, 2-butyl-2-ethyl-1,3-propanediol, 2-methyl-2,4-pentanediol) towards boron, potassium, lithium, sodium, calcium and magnesium ions were investigated as a function of pH and phase volume ratio (O/A) by considering an aqueous phase with a composition mimicking the brine from the Salar de Hombre Muerto in Argentina, in the Lithium Triangle. The mono-hydroxy alcohols are soluble in kerosene and sulfonated kerosene whereas the di-hydroxy alcohols are only soluble in mixtures of kerosene and toluene or m-xylene. No significant effect of the diluent on the extraction properties is observed. All alcohols exhibit high selectivity for boron over potassium, lithium, sodium, calcium and magnesium at acidic pH (pH = 1–5.5). A significant decrease of the extraction efficiency of boron by the mono-hydroxy alcohols is observed at pH >5.5 while no significant decrease of the extraction efficiency occurs with di-hydroxy alcohols. Finally, the best conditions to selectively extract boron from the synthetic brine with 1 mol L⁻¹ mono-hydroxy alcohols or di-hydroxy alcohols at 35 °C are pH = 5.5 and O/A = 4 when the diluent is kerosene and O/A = 2 when the diluent is a mixture of kerosene and toluene.

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用脂肪族一羟基和二羟基醇从具有代表性的大陆卤水中提取硼

研究了单羟基醇（2-丁基-1-辛醇、2-乙基-1-己醇、1-辛醇）和二羟基醇（2-乙基-1,3-己二醇、2-丁基-2-乙基-1,3-丙二醇、2-甲基-2,4-戊二醇）对硼、钾、锂、钠、钙和镁离子的萃取特性、硼、钾、锂、钠、钙和镁离子的关系，研究了水相的 pH 值和相体积比 (O/A)。单羟基醇可溶于煤油和磺化煤油，而二羟基醇只能溶于煤油和甲苯或间二甲苯的混合物。稀释剂对萃取性能没有明显影响。在酸性 pH 值（pH = 1-5.5）下，所有醇类对硼（钾、锂、钠、钙和镁）的选择性都很高。在 pH 值为 5.5 时，单羟基醇对硼的萃取效率明显降低，而二羟基醇对硼的萃取效率则没有明显降低。最后，在 35 °C条件下，用 1 mol L-1 单羟基醇或二羟基醇从合成盐水中选择性萃取硼的最佳条件是：当稀释剂为煤油时，pH = 5.5，O/A = 4；当稀释剂为煤油和甲苯的混合物时，O/A = 2。

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来源期刊

Hydrometallurgy 工程技术-冶金工程

CiteScore

9.50

自引率

6.40%

发文量

144

审稿时长

3.4 months

期刊介绍： Hydrometallurgy aims to compile studies on novel processes, process design, chemistry, modelling, control, economics and interfaces between unit operations, and to provide a forum for discussions on case histories and operational difficulties. Topics covered include: leaching of metal values by chemical reagents or bacterial action at ambient or elevated pressures and temperatures; separation of solids from leach liquors; removal of impurities and recovery of metal values by precipitation, ion exchange, solvent extraction, gaseous reduction, cementation, electro-winning and electro-refining; pre-treatment of ores by roasting or chemical treatments such as halogenation or reduction; recycling of reagents and treatment of effluents.