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Method for preparing strontium chloride

A technology of strontium chloride and strontium sulfide, applied in the direction of calcium/strontium/barium chloride, calcium/strontium/barium halide, etc., can solve problems such as increase in production cost, decline in economic benefit, decline in practicability, etc., and achieve production Short process, good social and economic benefits, cost reduction effect

Inactive Publication Date: 2007-11-14
QINGHAI INST OF SALT LAKES OF CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These methods for preparing strontium hydroxide all have long preparation processes, high energy consumption, and need to consume a large amount of chemical raw materials, which will undoubtedly increase production costs, decrease economic benefits, and decrease practicability.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Embodiment 1. Mix celestite ore powder with a strontium sulfate content of 55-75% and reduced coal powder in a weight ratio of 1:0.5-1:2.0, and roast at a temperature of 1100-1200° C. for 1.0-3.0 hours to obtain black Ash, leached three times in countercurrent with water with a solid-to-liquid weight ratio of 1:1 to 1:5 to obtain leaching solution A and leaching residue a, and then used leaching solution A to leaching another part of black ash countercurrently to obtain Leaching solution B and leaching residue b, use leaching solution B to leach the third part of black ash again to obtain leaching solution C and leaching residue c; combine leaching residues a, b, and c to form the total leaching residue, and pile up; the obtained The leach solution C reacts with strontium sulfide to form strontium polysulfide during the water leaching process, which makes the leach solution of strontium sulfide appear yellow, so it is commonly called yellow water, and its concentration (...

Embodiment 2

[0031] Example 2, mixing celestite ore powder with a strontium sulfate content of 55 to 70% and reduced coal powder in a weight ratio of 1:0.5 to 1:2.0, and roasting at a temperature of 1100 to 1200°C for 1.0 to 3.0 hours to obtain black Ashes, leached three times in countercurrent with water with a solid-to-liquid weight ratio of 1:1 to 1:5 to obtain a leaching solution and a leaching residue. Strontium polysulfide makes the leaching solution of strontium sulfide appear yellow, so it is commonly called yellow water. Add water to control its concentration (calculated as SrS) to 50g / L.

[0032] Take 500mL of yellow water, pass through H 2 S gas to saturation, slowly add 90g of purified MgCl under stirring 2 ·6H 2 O (obtained by purifying salt lake magnesium chloride by conventional methods), the reaction system was maintained at 85° C., and the reaction time was 1 hour. The hydrogen sulfide gas produced in the reaction is used to prepare strontium hydrosulfide from the satura...

Embodiment 3

[0033] Example 3, mixing celestite ore powder with a strontium sulfate content of 55 to 70% and reduced coal powder in a weight ratio of 1:0.5 to 1:2.0, and roasting at a temperature of 1100 to 1200°C for 1.0 to 3.0 hours to obtain black ash, leached three times with 1:1~1:3 water countercurrently to obtain leaching solution A and leaching residue a, and then used leaching solution A to countercurrently leaching another part of black ash to obtain leaching solution B and leaching residue a. slag b, the third part of black ash is leached again with the leaching solution B to obtain the leaching solution C and the leaching residue c; the combined leaching residues a, b, and c are the total leaching residues, which are piled up; the obtained leaching solution C is due to the In the process of leaching with water, it reacts with strontium sulfide to form strontium polysulfide, which makes the leaching solution of strontium sulfide appear yellow, so it is commonly called yellow wate...

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PUM

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Abstract

The invention offers a new method of strontium chloride preparation, the method uses breeze to deoxidize celestite which is dipped into hot water and get solution of strontium sulfide, put sulfureted hydrogen gas into solution of strontium sulfide to make solution of strontium hydrosulphide which reacts with magnesium chloride to get products of strontium chloride and magnesium hydrate, sulfureted hydrogen gas formed in the reaction is used to make strontium hydrosulphide, thus, it circulates like these steps above. The flow of the invention id short, it no need to consume chemical raw material, the raw material used in this invention is simple to get and is cheap, the quality of the product is high; it can get byproduct of magnesium hydrate at the same time and avoid pollution of sulfureted hydrogen, therefore, it has good economical and social benefits, and it is especially suitable for area where the sources of magnesium chloride is abundant.

Description

technical field [0001] The invention belongs to the field of chemical industry and relates to a method for preparing strontium chloride, which is characterized in that the strontium chloride is prepared by using SrS solution obtained in the process of preparing strontium carbonate by a carbon reduction method and salt lake magnesium chloride as reactants. Background technique [0002] Strontium chloride is one of the main strontium salt products, mainly used in the production of high-purity strontium carbonate, magnetic materials, electrolytic metal strontium and other strontium salt preparation raw materials, also used in the production of electrolytic metal sodium flux and organic synthesis catalyst etc.; and it is also used in the manufacture of fireworks, production of toothpaste, pigments, etc. With the advancement of science and technology, the use of strontium chloride will be more expanded, and the market demand is growing rapidly. At present, the production of stro...

Claims

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Application Information

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IPC IPC(8): C01F11/26
Inventor 龙光明祁米香王树轩李坤张光辉
Owner QINGHAI INST OF SALT LAKES OF CHINESE ACAD OF SCI
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