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Method for directly preparing 4N level strontium chloride

A strontium chloride, direct technology, applied in chemical instruments and methods, calcium/strontium/barium chloride, inorganic chemistry, etc., can solve the problems such as the preparation of 4N grade strontium chloride, etc., to achieve less reagent consumption, product The effect of high purity and high yield

Inactive Publication Date: 2019-01-18
NANCHANG HANGKONG UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] It can be seen that there is no method for preparing 4N grade strontium chloride directly from the strontium chloride enrichment solution at present.

Method used

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  • Method for directly preparing 4N level strontium chloride

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] The naphthenic acid organic phase is a kerosene solution of naphthenic acid and TBP, in which the concentration of naphthenic acid is 1.0 mol / L and the concentration of TBP is 0.1 mol / L.

[0035] The organic phase of P5709 is a kerosene solution of P5709, and the concentration of P5709 is 1.0 mol / L.

[0036] The concentration of related elements in the strontium chloride enrichment solution are: S 4.5g / L, Na 2.0g / L, K 0.030g / L, Be 0.50g / L, Mg 1.5g / L, Ca 3.0g / L , Sr 115.0g / L, Ba 2.0g / L, Pb 0.50g / L, Cd 0.030g / L, Zn 0.50g / L, Al 0.030g / L, Fe 0.50g / L, Ti 0.050g / L.

[0037] Step 1: Saponification section I

[0038] According to the molar ratio of naphthenic acid: ammonia: strontium = 1: 0.60: 0.30, the naphthenic acid organic phase, 6.0 mol / L ammonia and the Sr / AlFeTi fractionation extraction and separation system from step 2 of the first stage outlet water phase The raw strontium chloride feed solution is added to the first stage of the saponification tank. After 8 levels of co-fl...

Embodiment 2

[0055] The naphthenic acid organic phase is a kerosene solution of naphthenic acid and TBP, in which the concentration of naphthenic acid is 1.0 mol / L and the concentration of TBP is 0.1 mol / L.

[0056] The organic phase of P5709 is a kerosene solution of P5709, and the concentration of P5709 is 1.0 mol / L.

[0057] The concentration of related elements in the strontium chloride enrichment solution are: S 1.0g / L, Na 0.10g / L, K 0.010g / L, Be 0.10g / L, Mg 0.10g / L, Ca 1.0g / L , Sr 150.0g / L, Ba 1.0g / L, Pb 0.010g / L, Cd0.010g / L, Zn 0.10g / L, Al 0.10g / L, Fe 0.10g / L, Ti 0.010g / L.

[0058] Step 1: Saponification section I

[0059] According to the molar ratio of naphthenic acid: ammonia: strontium = 1: 0.60: 0.30, the naphthenic acid organic phase, 6.0 mol / L ammonia and the Sr / AlFeTi fractionation extraction and separation system from step 2 of the first stage outlet water phase The raw strontium chloride feed solution is added to the first stage of the saponification tank. After 8 levels of co-f...

Embodiment 3

[0076] The naphthenic acid organic phase is a kerosene solution of naphthenic acid and TBP, in which the concentration of naphthenic acid is 1.0 mol / L and the concentration of TBP is 0.1 mol / L.

[0077] The organic phase of P5709 is a kerosene solution of P5709, and the concentration of P5709 is 1.0 mol / L.

[0078] The concentration of relevant elements in the strontium chloride enrichment solution are: S 8.0g / L, Na 4.0g / L, K 0.050g / L, Be 1.0g / L, Mg 3.0g / L, Ca 5.0g / L , Sr 80.0g / L, Ba 3.0g / L, Pb 1.0g / L, Cd 0.050g / L, Zn1.0g / L, Al 1.0g / L, Fe 1.0g / L, Ti 0.10g / L.

[0079] Step 1: Saponification section I

[0080] According to the molar ratio of naphthenic acid: ammonia: strontium = 1: 0.60: 0.30, the naphthenic acid organic phase, 6.0 mol / L ammonia and the Sr / AlFeTi fractionation extraction and separation system from step 2 of the first stage outlet water phase The raw strontium chloride feed solution is added to the first stage of the saponification tank. After 8 levels of co-flow sapon...

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Abstract

The invention provides a method for directly preparing 4N level strontium chloride. A strontium chloride enrichment matter serves as material liquid, naphthenic acid serves as an extraction agent andTBP serves as a demulsifier to separate and remove aluminum, iron and titanium impurities in the material liquid; P5709 serves as an extraction agent to separate and remove sulphur, sodium, potassium,beryllium, magnesium, calcium, barium, lead, cadmium and zinc in the material liquid; and the method specifically comprises the steps of a saponification stage I, quasi-fractional extraction separation of Sr / AlFeTi, a reverse extraction stage I, a saponification stage II, fractional extraction separation of SNaKBeMgCaSr / SrBaPbCdZn, full load quasi-fractional extraction separation of SNaKBeMgCa / Sr, fractional extraction separation of Sr / BaPbCdZn and a reverse extraction stage II. The purity of strontium in the 4N level strontium chloride solution is as high as 99.991-99.998%, the yield is 94-98%, a material basis is laid for preparation of 4N level strontium products, the separation efficiency is high, the technological process is short, the consumption of reagents is less, and the production cost is low.

Description

Technical field [0001] The present invention is a method for directly preparing 4N-grade strontium chloride, and specifically relates to a quasi-fractional extraction method using strontium chloride enrichment solution as a feed liquid, naphthenic acid as an extractant, TBP as a demulsifier, and a quasi-fractional extraction method to achieve strontium and aluminum and iron , Titanium and other metal elements; P5709 is an extractant, fractionation extraction and other extraction methods to achieve the separation of strontium and sodium, potassium, beryllium, magnesium, calcium, barium, lead, cadmium, zinc and other metal elements, and sulfur and other non-metal elements Separate, directly prepare 4N grade strontium chloride solution method. The specific technical field of the present invention is the preparation of 4N grade strontium chloride. Background technique [0002] With the increasing development of science and technology, there is an increasing demand for high-purity an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01F11/24
CPCC01F11/005C01F11/24C01P2006/80
Inventor 刘涛钟学明
Owner NANCHANG HANGKONG UNIVERSITY
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