Method for extracting boric acid from boron-containing magnesium chloride solution by using an acidification-extraction method
A technology of magnesium chloride solution and extraction method, which is applied in the direction of boron oxide compounds, etc., can solve problems such as unsuitable for boron extraction from salt lake brine, large dissolution loss, and inapplicability of salt lakes.
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Embodiment 1
[0006] Embodiment 1: adopt a certain salt lake boron-containing magnesium chloride brine, add sulfuric acid to the brine during acidification, make the pH value of the brine about 0, the acidification temperature is normal temperature, and the acidification time is 60 minutes, then the brine is filtered to obtain crude boric acid solid and the acidizing liquid, the acidizing liquid enters the multiple extraction process, and the extraction agent is added to the acidizing liquid during the multiple extractions to extract boron. After testing for six extractions, the boron content in the acidizing liquid is very low, and the extraction residue is discharged The extraction agent is prepared by mixing 2-octanol and iso-octanol in a ratio of 1:5 to obtain a main chain containing C 5~10 Branched monohydric mixed alcohol, monohydric mixed alcohol is diluted with aviation kerosene in a ratio of 1:1 to obtain a compound extractant. The stripping liquid in the multiple stripping is fres...
Embodiment 2
[0007] Embodiment 2: Take boron-containing magnesium chloride brine from a certain salt lake, add hydrochloric acid to the brine during acidification, make the pH value of the brine about 3, the acidification temperature is normal temperature, and the acidification time is 10 minutes, then the brine is filtered to obtain crude boric acid solid And the acidified liquid, the acidified liquid enters the multiple extraction process, and the extraction agent is added to the acidified liquid during the multiple extractions, and the boric acid extraction is carried out. After eight extractions, the boron content in the acidified liquid is reduced to no longer extractable, and the extracted The remaining liquid was drained, and the preparation of the extractant was a compound of 2-octyl alcohol and isoamyl alcohol in a ratio of 1:20 to obtain a main chain containing C 5~10 Monohydric mixed alcohol with branched chain, dilute monohydric mixed alcohol with sulfonated kerosene in a ratio ...
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