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Preparation method of high-purity strontium carbonate

A technology of high-purity strontium carbonate and strontium nitrate, applied in the direction of calcium carbonate/strontium/barium, etc., can solve the problems of high impurity content and low purity of strontium carbonate, and achieve the effects of low impurity content, low cost and simple preparation method

Inactive Publication Date: 2011-03-23
TIANJIN CHEM REAGENT RES INST
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Problems solved by technology

At present, the main production method of high-purity strontium carbonate is double decomposition method, which uses strontium sulfate solution and sodium carbonate solution to react to generate sodium sulfate solution and strontium carbonate precipitation. The strontium carbonate produced by this method has low purity and high impurity content, which cannot meet the requirements The need for demanding products in the electronics industry

Method used

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Examples

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Embodiment 1

[0017] A preparation method of high-purity strontium carbonate, the steps of the preparation method are:

[0018] (1), the preparation of ammonium carbonate solution: 10Kg distilled water is put into plastic barrel and feed ammonia gas and make ammoniacal liquor, relative density is controlled at 18Be, then feeds carbon dioxide gas, and pH value is controlled at 9.5, obtains ammonium carbonate solution for subsequent use;

[0019] (2), purify strontium nitrate: put 2Kg strontium nitrate into 3000ml distilled water, heat to 60 ℃ for dissolving, filter, concentrate, relative density is controlled at 20Be, dry after cooling crystallization, obtain purified strontium nitrate for subsequent use;

[0020] (3), removing impurity barium ions: put 1Kg of purified strontium nitrate into 3000ml distilled water, heat to 40°C for dissolving, then add 1g of sulfuric acid and stir, precipitate for 2 hours, filter to obtain the filtrate;

[0021] (4), the synthesis of high-purity strontium ca...

Embodiment 2

[0023] A preparation method of high-purity strontium carbonate, the steps of the preparation method are:

[0024] (1), the preparation of ammonium carbonate solution: 12Kg distilled water is put into plastic barrel and feed ammonia gas and make ammoniacal liquor, relative density is controlled at 20Be, then feeds carbon dioxide gas, and pH value is controlled at 9.2, obtains ammonium carbonate solution for subsequent use;

[0025] (2), purify strontium nitrate: put 2Kg strontium nitrate into 2500ml distilled water, heat to 70 ℃ for dissolving, filter, concentrate, relative density is controlled at 18Be, spin dry after cooling crystallization, obtain purified strontium nitrate for subsequent use;

[0026] (3), removing impurity barium ions: put 1.1Kg of purified strontium nitrate into 3300ml of distilled water, heat to 50°C for dissolving, then add 1.1g of sulfuric acid and stir, precipitate for 3 hours, filter to obtain the filtrate;

[0027] (4), the synthesis of high-purity ...

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Abstract

The invention belongs to a preparation method of high-purity strontium carbonate, comprising the following steps: (1) ammonium carbonate solution preparation; (2) strontium nitrate purification: placing the strontium nitrate into distilled water; heating the mixture to 60-70 DEG C; dissolving, filtering, and concentrating; controlling the relative density to be 18-20 Be; drying after cooling and crystallizing to obtain the purified strontium nitrate for later use; (3) impurity barium ions removing: placing the purified strontium nitrate into the distilled water; heating mixture to 40-50 DEG C; dissolving, adding sulfuric acid, stirring, precipitating for 2-3h, and filtering to obtain filter liquor; and (4) high-purity strontium carbonate synthesis: heating the filter liquor obtained in the step (3) to 60-70 DEG C; adding the ammonium carbonate solution obtained in the step (1); controlling the pH value at 8.5-9; and standing for 4-5h to obtain strontium nitrate precipitation; drying after pumping to dry to obtain the high-purity strontium carbonate finish product. The prepared strontium carbonate finish product has high purity and low impurity content, and the preparation process has simple process steps and higher production efficiency.

Description

technical field [0001] The invention belongs to the field of inorganic compounds, in particular to a preparation method of high-purity strontium carbonate. Background technique [0002] High-purity strontium carbonate is widely used in the electronics industry, especially in the manufacture of color TV picture tubes and electromagnets. At present, the main production method of high-purity strontium carbonate is double decomposition method, which uses strontium sulfate solution and sodium carbonate solution to react to generate sodium sulfate solution and strontium carbonate precipitation. The strontium carbonate produced by this method has low purity and high impurity content, which cannot meet the requirements The need for demanding products in the electronics industry. Contents of the invention [0003] The purpose of the present invention is to overcome the deficiencies of the prior art and provide a method for preparing high-purity strontium carbonate with high purity...

Claims

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Application Information

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IPC IPC(8): C01F11/18
Inventor 胡建华
Owner TIANJIN CHEM REAGENT RES INST
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