Method for preparing 5N-class strontium chloride

A technology of strontium chloride and saponification, applied in the direction of calcium/strontium/barium chloride, calcium/strontium/barium halide, etc., can solve the problems such as no 5N grade strontium chloride, achieve high purity, short technological process, The effect of high separation efficiency

Inactive Publication Date: 2019-02-12
NANCHANG HANGKONG UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, there is no method for preparing 5N-grade strontium chloride from 2N-grade strontium chloride

Method used

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  • Method for preparing 5N-class strontium chloride

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] The P507 organic phase is a sulfonated kerosene solution of P507 and TBP, wherein the concentration of P507 is 1.0 mol / L, and the concentration of TBP is 0.10 mol / L.

[0028] The relevant element concentrations in the 2N grade strontium chloride solution are: S 0.020g / L, Na 0.030g / L, K0.0050g / L, Be 0.020g / L, Mg 0.050g / L, Ca 0.30g / L, Sr 130.0g / L, Ba 0.20g / L, Pb 0.0050g / L, Cd 0.0050g / L, Zn 0.0050g / L, Al 0.030g / L, Fe 0.030g / L.

[0029] Step 1: Saponification section

[0030] Be P507 according to molar ratio: ammoniacal liquor: strontium=1: 0.36: 0.18, the ammoniacal liquor of P507 organic phase, 6.0mol / L and the SNaKBeMgCaSr / SrBaPbCdZnAlFe fractional distillation extraction separation system from step 2 contain sulfur, sodium , Potassium, beryllium, magnesium, calcium strontium chloride solution is added to the first stage of saponification tank. After 8 stages of co-flow saponification and phase separation, the aqueous phase is saponification wastewater, the organic pha...

Embodiment 2

[0041] The P507 organic phase is a sulfonated kerosene solution of P507 and TBP, wherein the concentration of P507 is 1.0 mol / L, and the concentration of TBP is 0.10 mol / L.

[0042] The relevant element concentrations in the 2N grade strontium chloride solution are: S 0.010g / L, Na 0.010g / L, K0.0010g / L, Be 0.010g / L, Mg 0.010g / L, Ca 0.10g / L, Sr 150.0g / L, Ba 0.10g / L, Pb 0.0010g / L, Cd 0.0010g / L, Zn 0.0010g / L, Al 0.010g / L, Fe 0.010g / L.

[0043] Step 1: Saponification section

[0044] Be P507 according to molar ratio: ammoniacal liquor: strontium=1: 0.36: 0.18, the ammoniacal liquor of P507 organic phase, 6.0mol / L and the SNaKBeMgCaSr / SrBaPbCdZnAlFe fractional distillation extraction separation system from step 2 contain sulfur, sodium , Potassium, beryllium, magnesium, calcium strontium chloride solution is added to the first stage of saponification tank. After 8 stages of co-flow saponification and phase separation, the aqueous phase is saponification wastewater, the organic pha...

Embodiment 3

[0055] The P507 organic phase is a sulfonated kerosene solution of P507 and TBP, wherein the concentration of P507 is 1.0 mol / L, and the concentration of TBP is 0.10 mol / L.

[0056] The relevant element concentrations in the 2N grade strontium chloride solution are: S 0.030g / L, Na 0.050g / L, K 0.010g / L, Be 0.030g / L, Mg 0.10g / L, Ca 0.50g / L, Sr 110.0g / L, Ba 0.30g / L, Pb 0.010g / L, Cd 0.010g / L, Zn 0.010g / L, Al 0.050g / L, Fe 0.050g / L.

[0057] Step 1: Saponification section

[0058] Be P507 according to molar ratio: ammoniacal liquor: strontium=1: 0.36: 0.18, the ammoniacal liquor of P507 organic phase, 6.0mol / L and the SNaKBeMgCaSr / SrBaPbCdZnAlFe fractional distillation extraction separation system from step 2 contain sulfur, sodium , Potassium, beryllium, magnesium, calcium strontium chloride solution is added to the first stage of saponification tank. After 8 stages of co-flow saponification and phase separation, the aqueous phase is saponification wastewater, the organic phase i...

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Abstract

The invention relates to a method for preparing 5N-class strontium chloride. The method is characterized in that a 2N-class strontium chloride solution is used as material liquid; P507 is used as an extracting agent, and TBP (tri-butyl-phosphate) is used as a modifying agent; the impurity elements in the 2N-class strontium chloride solution, such as sulfur, sodium, potassium, beryllium, magnesium,calcium, barium, lead, cadmium, zinc, aluminum and iron, can be removed by extracting and separating. The method specifically comprises the following five steps of saponifying; fractionating, extracting and separating of SNaKBeMgCaSr / SrBaPbCdZnAlFe; full-load quasi-fractionating, extracting and separating of SNaKBeMgCa / Sr; fractionating, extracting and separating of Sr / BaPbCdZnAlFe; and reverse extracting. The prepared 5N-class strontium chloride solution has the advantages that the purity of strontium is 99.9991% to 99.9998%, and the yield rate is 93% to 97%; the purity and yield rate of theproduct are high, the consumption of reagent is low, the separating efficiency is high, the technology process is short, the production cost is low, and the like.

Description

technical field [0001] A method for preparing 5N-grade strontium chloride of the present invention involves using 2N-grade strontium chloride solution as a feed liquid, P507 as an extractant, and TBP as a modifier to extract and separate sulfur, sodium, potassium, beryllium, magnesium, Calcium, barium, lead, cadmium, zinc, aluminum, iron and other impurities to prepare 5N grade strontium chloride solution. The specific technical field of the present invention is the preparation of 5N grade strontium chloride. Background technique [0002] 5N grade (99.9990%-99.9998%) strontium chloride is not only an important high-purity strontium product, but also one of the basic materials for preparing 5N grade strontium carbonate and other high-purity strontium products. At present, there is an increasingly urgent demand for high-purity and ultra-high-purity strontium compounds with a purity even higher than 5N (99.999%), and the development of a technology for preparing 5N-grade stron...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01F11/24
CPCC01F11/24C01P2006/80
Inventor 刘俊辰钟学明
Owner NANCHANG HANGKONG UNIVERSITY
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