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Method for preparing 6N-level strontium chloride

A technology of strontium chloride and strontium soap, applied in chemical instruments and methods, separation methods, calcium/strontium/barium chloride and other directions, can solve the problems such as the lack of 6N grade strontium chloride, and achieve high product purity and separation efficiency High, high-yield effect

Inactive Publication Date: 2019-01-25
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 6N-grade strontium chloride from 2N-grade strontium chloride

Method used

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  • Method for preparing 6N-level strontium chloride

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] The P229 organic phase is a sulfonated kerosene solution of P229, wherein the concentration of P229 is 1.0mol / L.

[0028] The relevant element concentrations in the 2N grade strontium chloride solution are: S 0.0150g / L, Na 0.020g / L, K0.0030g / L, Be 0.0150g / L, Mg 0.030g / L, Ca 0.20g / L, Sr 130.0g / L, Ba 0.15g / L, Pb 0.0030g / L, Cd 0.0030g / L, Zn 0.0030g / L, Al 0.0020g / L, Fe 0.020g / L.

[0029] Step 1: Saponification section

[0030] Be P229 according to molar ratio: ammoniacal liquor: strontium=1: 0.36: 0.18, the ammoniacal liquor of P229 organic phase, 6.0mol / L and the SNaKBeMgCaSr / SrBaPbCdZnAlFe fractional distillation extraction separation system from step 2 contain sulfur, sodium in the first stage outlet water phase , 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 is stront...

Embodiment 2

[0041] The P229 organic phase is a sulfonated kerosene solution of P229, wherein the concentration of P229 is 1.0mol / 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 P229 according to molar ratio: ammoniacal liquor: strontium=1: 0.36: 0.18, the ammoniacal liquor of P229 organic phase, 6.0mol / L and the SNaKBeMgCaSr / SrBaPbCdZnAlFe fractional distillation extraction separation system from step 2 contain sulfur, sodium in the first stage outlet water phase , 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 is strontium...

Embodiment 3

[0055] The P229 organic phase is a sulfonated kerosene solution of P229, wherein the concentration of P229 is 1.0mol / L.

[0056] 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 110.0g / L, Ba 0.20g / L, Pb 0.0050g / L, Cd 0.0050g / L, Zn 0.0050g / L, Al 0.0030g / L, Fe 0.030g / L.

[0057] Step 1: Saponification section

[0058] Be P229 according to molar ratio: ammoniacal liquor: strontium=1: 0.36: 0.18, the ammoniacal liquor of P229 organic phase, 6.0mol / L and the SNaKBeMgCaSr / SrBaPbCdZnAlFe fractional distillation extraction separation system from step 2 contain sulfur, sodium in the first stage outlet water phase , 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 is strontiu...

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Abstract

The invention discloses a method for preparing 6N-level strontium chloride. According to the method, a 2N-level strontium chloride solution is adopted as a material liquid, P229 is adopted as an extraction agent to extract and separate out impurity elements such as sulfur, sodium, potassium, beryllium, magnesium, calcium, barium, lead, cadmium, zinc, aluminum and iron from the 2N-level strontium chloride solution, and a 6N-level strontium chloride solution is prepared. The method specifically comprises five steps of saponification, fractional extraction and separation of SNaKBeMgCaSr / SrBaPbCdZnAlFe, fully-loaded standard fractional extraction and separation of SNaKBeMgCa / Sr, fractional extraction and separation of Sr / BaPbCdZnAlFe and reverse extraction. According to the prepared 6N-level strontium chloride solution, the purity of strontium is 99.99991%-99.99998%, and the yield is 92%-96%. The method has the advantages that the purity and yield of products are high, consumption of reagents is small, the separation efficiency is high, the technological flow is short, and the production cost is low.

Description

technical field [0001] A method for preparing 6N-grade strontium chloride of the present invention involves using 2N-grade strontium chloride solution as a feed liquid and P229 as an extraction agent to extract and separate sulfur, sodium, potassium, beryllium, magnesium, calcium, barium, lead, cadmium, zinc, aluminum, iron and other impurities to prepare 6N grade strontium chloride solution. The specific technical field of the present invention is the preparation of 6N grade strontium chloride. Background technique [0002] Impurities in materials, especially high-end materials and high-purity materials, seriously deteriorate the performance of materials, so the purity determines the performance of materials. 6N grade (99.99990%-99.99998%) strontium chloride is not only an important ultra-high-purity strontium product, but also one of the basic materials for preparing 6N-grade strontium carbonate and other ultra-high-purity strontium products. At present, the demand for u...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01F11/32B01D11/04
CPCB01D11/0492C01F11/32C01P2006/80
Inventor 徐玉娜钟学明
Owner NANCHANG HANGKONG UNIVERSITY
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