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
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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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