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A kind of method for preparing 5n level magnesium chloride solution

A magnesium chloride solution, magnesium chloride technology, applied in the preparation of 5N grade magnesium chloride, the field of preparing 5N grade magnesium chloride solution

Active Publication Date: 2022-01-25
NANCHANG HANGKONG UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The present invention aims at the method that there is no preparation of 5N grade magnesium chloride at present, establishes a kind of method that prepares 5N grade magnesium chloride solution with industrial grade magnesium chloride aqueous solution as feed liquid

Method used

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  • A kind of method for preparing 5n level magnesium chloride solution

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] The organic phase of P229 is sulfonated kerosene of P229, wherein the concentration of P229 is 1.0mol / L. When in use, use ammonia water to saponify the P229 organic phase to obtain the ammonia saponified P229 organic phase.

[0022] The element concentrations in the industrial grade magnesium chloride aqueous solution are: Br 0.010g / L, S 0.010g / L, As0.010g / L, Si 0.010g / L, Na 0.10g / L, K 0.010g / L, Mg 65.0g / L, Ca 0.10g / L, Ba 0.0010g / L, Pb 0.0010g / L, Al 0.0010g / L, Fe 0.0010g / L.

[0023] Step 1: Separation of NaKMg / MgCaBaPbAlFe by fractional distillation with full load

[0024] Use the balanced load P229 organic phase obtained at the 22nd stage of the NaK / Mg full-load fractionation extraction system in step 2 as the extraction organic phase, and the industrial grade magnesium chloride aqueous solution as the feed liquid, and the equilibrium water obtained at the 34th stage of the Mg / CaBaPbAlFe fractionation extraction system in step 3 The phase is detergent. The balanced...

Embodiment 2

[0031] The organic phase of P229 is sulfonated kerosene of P229, wherein the concentration of P229 is 1.0mol / L. When in use, use ammonia water to saponify the P229 organic phase to obtain the ammonia saponified P229 organic phase.

[0032] The element concentrations in the industrial grade magnesium chloride aqueous solution are: Br 0.020g / L, S 0.020g / L, As0.020g / L, Si 0.020g / L, Na 0.20g / L, K 0.030g / L, Mg 70.0g / L, Ca 0.30g / L, Ba 0.0020g / L, Pb 0.0020g / L, Al 0.0020g / L, Fe 0.0020g / L.

[0033] Step 1: Separation of NaKMg / MgCaBaPbAlFe by fractional distillation with full load

[0034] Use the balanced load P229 organic phase obtained at the 20th stage of the NaK / Mg full-load fractionation extraction system in step 2 as the extraction organic phase, and the industrial grade magnesium chloride aqueous solution as the feed liquid, and the equilibrium water obtained at the 38th stage of the Mg / CaBaPbAlFe fractionation extraction system in step 3 The phase is detergent. The balanced...

Embodiment 3

[0041] The organic phase of P229 is sulfonated kerosene of P229, wherein the concentration of P229 is 1.0mol / L. When in use, use ammonia water to saponify the P229 organic phase to obtain the ammonia saponified P229 organic phase.

[0042] The element concentrations in the industrial grade magnesium chloride aqueous solution are: Br 0.030g / L, S 0.030g / L, As0.030g / L, Si 0.030g / L, Na 0.30g / L, K 0.050g / L, Mg 75.0g / L, Ca 0.50g / L, Ba 0.0030g / L, Pb 0.0030g / L, Al 0.0030g / L, Fe 0.0030g / L.

[0043] Step 1: Separation of NaKMg / MgCaBaPbAlFe by fractional distillation with full load

[0044] Use the balanced load P229 organic phase obtained at the 20th stage of the NaK / Mg full-load fractionation extraction system in step 2 as the extraction organic phase, and the industrial grade magnesium chloride aqueous solution as the feed liquid, and the equilibrium water obtained at the 40th stage of the Mg / CaBaPbAlFe fractionation extraction system in step 3 The phase is detergent. The balanced...

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Abstract

A method for preparing 5N-grade magnesium chloride solution of the present invention uses industrial-grade magnesium chloride aqueous solution as the feed liquid and P229 as the extraction agent; by three full-load fractional distillation extraction and separation of NaKMg / MgCaBaPbAlFe, full-load fractional distillation extraction and separation of NaK / Mg and fractional distillation extraction separation of Mg / CaBaPbAlFe three The composition of steps; preparation of 5N grade magnesium chloride solution. The purity of the target product 5N grade magnesium chloride solution is 99.9991% to 99.9997%, and the yield of magnesium in the industrial grade magnesium chloride aqueous solution is 96% to 98%. The invention has the advantages of high product purity, high magnesium yield, less reagent consumption, high separation efficiency, short process flow, low production cost and the like.

Description

technical field [0001] The invention relates to a method for preparing a 5N grade magnesium chloride solution, which specifically involves using an industrial grade magnesium chloride aqueous solution as a feed liquid and P229 as an extraction agent to separate and remove metal elements such as sodium, potassium, calcium, barium, lead, aluminum, iron, etc. in the feed liquid , and separate and remove bromine, sulfur, arsenic, silicon and other non-metallic elements to prepare 5N grade magnesium chloride solution. The specific technical field of the present invention is the preparation of 5N grade magnesium chloride. Background technique [0002] 5N grade magnesium chloride is one of the basic raw materials for preparing other 5N grade magnesium products, but there is no method for preparing 5N grade magnesium chloride at present. [0003] In view of the fact that there is no method for preparing 5N-grade magnesium chloride at present, the present invention establishes a met...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01F5/30
CPCC01F5/30
Inventor 曾佳丽钟学明王菲
Owner NANCHANG HANGKONG UNIVERSITY
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