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Method for preparing high-purity strontium dihydroxide by utilizing strontium slag

A technology of strontium hydroxide and sodium hydroxide, applied in calcium/strontium/barium oxide/hydroxide, chemical instruments and methods, calcium/strontium/barium compounds, etc., can solve environmental problems such as pollution, waste of resources, etc. To achieve the effect of short process flow, reduce pollution and improve utilization rate

Active Publication Date: 2016-02-03
QINGHAI UNIV FOR NATITIES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

This patented technology involves making highly pure strontum hydroxides by adding bismuth oxychlorosilane (BOS) or other materials into an acidic solution containing calcium sulfate at temperatures between 70°C-85°C. These methods improve efficiency and reduce environmental concerns compared to traditional processes that use these chemicals.

Problems solved by technology

This patents describes different ways to produce various types of specialty chemical called strontum carbonates that can absorb x-, y-, or gamma radiation from sunlight without losing their effectiveness over time due to environmental concerns such as disposal costs and contaminating waterways. Additionally, this method allows us to use scraped off ends during processing instead of discarded ones, which saves money while minimizing damage caused by harmful substances present within the atmosphere.

Method used

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  • Method for preparing high-purity strontium dihydroxide by utilizing strontium slag
  • Method for preparing high-purity strontium dihydroxide by utilizing strontium slag
  • Method for preparing high-purity strontium dihydroxide by utilizing strontium slag

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] 1. Grinding the strontium slag. The smaller the particle size, the better.

[0033] 2. Mix the ground strontium slag and water according to the mass ratio of 1:1 to form a slurry, add a mixed solution of sulfuric acid and hydrochloric acid to the slurry, wherein the mass percent concentration of sulfuric acid is 0.5% to 1%, and the concentration of hydrochloric acid The mass percent concentration is 15% to 20%, the pH of the solution is adjusted to 0 to 0.2, heated to 85° C. and then kept at the temperature for 1 hour, and then the precipitate is separated by filtration to obtain the first liquid solution.

[0034] 3. Add 15% sodium hydroxide solution to the first solution, adjust the pH value of the first solution to 7, heat to 70° C. and keep the temperature for 1 hour, then filter and separate the precipitate to obtain a liquid second solution.

[0035] 4. Add a sodium hydroxide solution with a mass concentration of 15% to the second solution, adjust the pH value of...

Embodiment 2

[0040] 1. Grinding the strontium slag. The smaller the particle size, the better.

[0041] 2. Mix the ground strontium slag and water according to the mass ratio of 1:2 to form a slurry, add a mixed solution of sulfuric acid and hydrochloric acid to the slurry, wherein the mass percent concentration of sulfuric acid is 0.5% to 1%, and the concentration of hydrochloric acid The mass percent concentration is 15% to 20%, the pH of the solution is adjusted to 0 to 0.2, heated to 90° C. and then kept at a constant temperature for 2 hours, and then the precipitate is filtered to obtain a liquid first solution.

[0042] 3. Add 18% sodium hydroxide solution to the first solution, adjust the pH value of the first solution to 8, heat to 50° C., keep the temperature for 2 hours, and then filter and separate the precipitate to obtain a liquid second solution.

[0043] 4. Add a sodium hydroxide solution with a mass concentration of 18% to the second solution, adjust the pH value of the se...

Embodiment 3

[0048] 1. Grinding strontium slag. The smaller the particle size, the better.

[0049] 2. Mix the ground strontium slag and water according to the mass ratio of 1:3 to form a slurry, and add a mixed solution of sulfuric acid and hydrochloric acid to the slurry, wherein the mass percentage concentration of sulfuric acid is 0.5% to 1%, and the mass percentage of hydrochloric acid The percentage concentration is 15%-20%, the pH of the solution is adjusted to 0-0.2, then the mixed solution is heated to 100° C. and then kept at a constant temperature for 1.5 hours; finally cooled, filtered, and the precipitate is separated to obtain the first liquid solution.

[0050] 3. Add 20% sodium hydroxide solution to the first solution, adjust the pH value of the first solution to 9.5, heat to 60°C and keep the temperature for 0.5h, then filter and separate the precipitate to obtain a liquid second solution.

[0051] 4. Adding a sodium hydroxide solution with a mass concentration of 20% to ...

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Abstract

The invention discloses a method for preparing high-purity strontium dihydroxide by utilizing strontium slag. The method comprises the steps: (1) grinding the strontium slag; (2) dissolving the ground strontium slag and adding mixed solution of sulfuric acid and hydrochloric acid, and performing filtration to obtain liquid first solution; (3) adding sodium hydroxide solution into the first solution, performing filtering separation of sediment after the heating, and obtaining liquid second solution; (4) adding solid strontium dihydroxide into the second solution, performing heating to 40-70 DEG C and then maintaining constant temperature for 0.5-2 h, performing filtering separation of sediment, and obtaining strontium chloride solution; (5) using deionized water to dilute the strontium chloride solution and then adding sodium hydroxide solution to perform alkali decomposition, and filtering the precipitated crystal to obtain coarse strontium hydroxide crystal; (6) recrystalizing the coarse strontium hydroxide crystal, and obtaining high-purity strontium dihydroxide crystal. According to the method, tailing resources are utilized, the strontium ore utilization rate is improved, and the environmental pollution caused by tailings is reduced.

Description

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Claims

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Application Information

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Owner QINGHAI UNIV FOR NATITIES
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