从江陵凹陷富钾地下卤水中提取硼酸

Abstract

Abstract: The underground brine in Jiangling Depression is rich in a variety of resources.The concentrations of sodium chloride，potassium chloride，and boron trioxide in the brine are 23.3%（mass fraction），1.4%（mass fraction），and 2.48 g/L，respectively，which are more than two times of their industrial grade.According to the characteristics of sodium chloride in brine close to its saturation degree，boron trioxide enriched from 2.48 g/L to 9.84 g/L at the best concentration multiple of four times by the precipitation of sodium chloride through evaporation.Then，boron was separated by solvent extraction method， with the single-stage extraction yield of 96.73% and the stripping efficiency of 98.81%.Boric acid product was prepared by the evaporation and acidification to the strip liquor， with its quality achieving the requirements for the first class of Industrial Boric Acid，GB/T 538—2006.The total recovery fraction of boron was 82.63%.

Key words: Jiangling Depression, underground brine, boric acid, extraction, stripping

CLC Number:

TQ128.54

ZHANG Xiu-Feng, TAN Xiu-Min, ZHANG Li-Zhen, MA Ya-Meng. Extraction of boric acid from potassium-rich underground brine in Jiangling Depression[J]. INORGANICCHEMICALSINDUSTRY, 2015, 47(5): 21-.

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Inorganic Acid-Base-Salt Committee of CIESC

Extraction of boric acid from potassium-rich underground brine in Jiangling Depression

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