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Preparation method of guaranteed-reagent sodium antimonate

A technology for obtaining pure sodium antimonate and sodium antimonate, applied in the direction of antimonate/antimonite, etc., can solve the problems of not meeting the needs of the electronics industry, high impurity content, low purity of sodium antimonate, etc., and achieve production efficiency High, low impurity content, easy to control the effect of operation

Inactive Publication Date: 2016-02-10
TIANJIN CHEM REAGENT RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] High-grade pure sodium antimonate is widely used in color TV picture tube glass bulbs and high-grade glass clarifiers. The current chlorination method is to mix antimony trioxide with hydrochloric acid to prepare sodium antimonate. The antimony acid produced by this method is Sodium purity is low, impurity content is high, can only meet the opaque filler of cast iron paint, textile flame retardant, can not meet the needs of the electronics industry

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] A preparation method of superior grade pure sodium antimonate, the method is as follows:

[0017] ⑴ Oxidation of antimony trioxide

[0018] Put 3Kg antimony trioxide and 1Kg sodium hydroxide into a stainless steel bucket, add 1000ml of distilled water, dissolve under constant stirring, heat after dissolving, heating temperature is at 55°C, and slowly add 100ml of hydrogen peroxide solution under constant stirring , that is, sodium antimonate precipitates, and A is obtained after drying;

[0019] ⑵Synthesis to obtain superior pure sodium antimonate

[0020] A obtained from step (1) was dissolved by adding HCl (content 37%) under constant stirring, adjusted to pH 1, and filtered to obtain solution B, which was obtained by adding sodium hydroxide to neutralize to PH=6 under constant stirring, The precipitate was precipitated, cooled, and washed with distilled water. After washing, it was dried and placed in a desiccator for drying. The drying temperature was 100°C for 2 ...

Embodiment 2

[0022] A preparation method of superior grade pure sodium antimonate, the method is as follows:

[0023] ⑴ Oxidation of antimony trioxide

[0024] Put 4.5Kg antimony trioxide and 1.5Kg sodium hydroxide into a stainless steel bucket, add 1500ml of distilled water, dissolve under constant stirring, heat after dissolving, heating temperature is at 60°C, and slowly add hydrogen peroxide solution under constant stirring 120 ml, the sodium antimonate precipitate was obtained, and A was obtained after drying;

[0025] ⑵Synthesis to obtain superior pure sodium antimonate

[0026] The A obtained from step (1) was dissolved by adding HCl (content 37%) under constant stirring, adjusted to pH 2, and filtered to obtain solution B, which was obtained by adding sodium hydroxide to neutralize to PH=6 under constant stirring, The precipitate was precipitated, cooled, and washed with distilled water. After washing, it was dried and placed in a desiccator for drying. The drying temperature was...

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Abstract

The invention relates to a preparation method of guaranteed-reagent sodium antimonate, which includes the following steps: 1) oxidization of antimonous oxide: placing the antimonous oxide and sodium hydroxide into a stainless steel barrel, adding distilled water with continuous stirring to dissolve the raw materials, heating the solution at 60 DEG C, and adding slowly a hydrogen peroxide solution with continuous stirring to obtain sodium antimonate precipitate, and spin-drying the precipitate to obtain a substance A; and (2) synthesis to prepare the guaranteed-reagent sodium antimonate: adding the substance A in the step 1) to a 37 wt% hydrochloride acid solution with continuous stirring to dissolve the substance A, regulating the pH to 2, performing filtration to obtain a solution B, adding sodium hydroxide to the solution B with continuous stirring to neutralize the solution until pH=6, separating out the precipitate and cooling the precipitate, washing the precipitate with distilled water, spin-drying the precipitate and drying the precipitate in a drier at 110 DEG C for 3 h to obtain the guaranteed-reagent sodium antimonate. In the method, under effects of the oxidizing agent hydrogen peroxide, the sodium antimonate is generated by oxidizing the antimonous oxide and carrying out a reaction to the oxidized antimonous oxide and sodium hydroxide.

Description

technical field [0001] The invention belongs to the field of inorganic compounds, in particular to a preparation method of high-grade pure sodium antimonate. Background technique [0002] High-grade pure sodium antimonate is widely used in color TV picture tube glass bulbs and high-grade glass clarifiers. The current chlorination method is to mix antimony trioxide with hydrochloric acid to prepare sodium antimonate. The antimony acid produced by this method is Sodium has low purity and high impurity content, which can only meet the needs of opaque fillers for cast iron paints and textile flame retardants, but cannot meet the needs of 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 superior-grade pure sodium antimonate with simple process steps, high production efficiency, low impurity content and high purity. [0004] The purpose technical ...

Claims

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Application Information

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IPC IPC(8): C01G30/02
Inventor 胡建华
Owner TIANJIN CHEM REAGENT RES INST
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