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A kind of method of producing sodium antimonate with antimony oxide

A technology for the production of sodium antimonate and antimony oxide, applied in chemical instruments and methods, antimonate/antimonite, inorganic chemistry, etc., can solve the problems of unsatisfactory raw material utilization and conversion rate, and achieve saving raw material consumption , improve the conversion rate, and promote the effect of conversion

Inactive Publication Date: 2018-02-06
陈安民
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the utilization rate and conversion rate of raw materials in this process are not ideal enough and need to be further improved.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] A method for producing sodium antimonate with antimony oxide, the production steps are:

[0019] (1) Heat the raw material antimony oxide at 300°C for 20 minutes under the condition of feeding air, then add it into the reaction vessel, add 25% hydrochloric acid and water into the reaction vessel, the addition amount is 1000g Add 250ml of hydrochloric acid and 500ml of water to the antimony raw material, stir at a speed of 250 rpm, add sodium polyacrylate during the stirring, and the amount of sodium polyacrylate added is 1% of the weight of the antimony oxide raw material;

[0020] (2) Add sodium hydroxide to the reaction vessel, the amount added is 40% of the weight of the antimony oxide raw material, continue to stir and control the reaction temperature to 50°C, after 40 minutes of reaction, feed oxygen into the reaction vessel to make the reaction mixture Under the oxygen pressure of 0.2MPa;

[0021] (3) Slowly add hydrogen peroxide into the reaction vessel. The tot...

Embodiment 2

[0024] A method for producing sodium antimonate with antimony oxide, the production steps are:

[0025] (1) Heat the raw material antimony oxide at 320°C for 20 minutes under the condition of feeding air, then add it into the reaction vessel, add 25% hydrochloric acid and water into the reaction vessel, the addition amount is 1000g oxidation Add 250ml of hydrochloric acid and 500ml of water to the antimony raw material, stir at a speed of 250 rpm, add sodium polyacrylate during the stirring, and the amount of sodium polyacrylate added is 2% of the weight of the antimony oxide raw material;

[0026] (2) Add sodium hydroxide to the reaction vessel, the amount added is 45% of the weight of the antimony oxide raw material, continue to stir and control the reaction temperature to 60°C, and after 30 minutes of reaction, feed oxygen into the reaction vessel to make the reaction mixture Under the oxygen pressure of 0.2MPa;

[0027] (3) Slowly add hydrogen peroxide into the reaction v...

Embodiment 3

[0030] A method for producing sodium antimonate with antimony oxide, the production steps are:

[0031] (1) Heat the raw material antimony oxide at 310°C for 20 minutes under the condition of feeding air, then add it into the reaction vessel, add 25% hydrochloric acid and water into the reaction vessel, the addition amount is 1000g Add 250ml of hydrochloric acid and 500ml of water to the antimony raw material, stir at a speed of 250 rpm, add sodium polyacrylate during the stirring, and the amount of sodium polyacrylate added is 1.5% of the weight of the antimony oxide raw material;

[0032] (2) Add sodium hydroxide to the reaction vessel in an amount of 42% of the weight of the antimony oxide raw material, continue to stir and control the reaction temperature to 55°C, and after 35 minutes of reaction, inject oxygen into the reaction vessel to make the reaction mixture Under the oxygen pressure of 0.2MPa;

[0033] (3) Slowly add hydrogen peroxide into the reaction vessel. The ...

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PUM

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Abstract

The invention relates to a method using antimony oxide to produce sodium antimonate. The method includes: heating the antimony oxide for 20 minutes, adding into a reactor container, adding hydrochloric acid and water, adding sodium polyacrylate while stirring, adding sodium hydroxide into the reaction container, continuing stirring, controlling reaction temperature to be 50-60 DEG C to perform reaction for 30-40 minutes, and feeding oxygen into the reaction container; slowly adding hydrogen peroxide, controlling reaction temperature to be 40-50 DEG C, and continuing performing reaction for 10 minutes after the adding of the hydrogen peroxide is completed in 30-50 minutes, and stopping stirring; standing, cooling to room temperature to filter out precipitates, washing the precipitates with water, and drying the washed precipitates until the moisture of the precipitates is smaller than 0.3% to obtain the sodium antimonate. By the method, the conversion of the antimony oxide during reaction is promoted, conversion rate is increased, and accordingly the production efficiency of the sodium antimonate is increased, raw material utilization rate is increased, the production time of the sodium antimonate is lowered effectively, and raw material use amount is reduced.

Description

technical field [0001] The invention belongs to the technical field of sodium antimonate preparation technology, and mainly relates to a method for producing sodium antimonate by using antimony oxide. technical background [0002] Sodium antimonate, also known as sodium pyroantimonate, the molecular formula is NaSbO 3 ·3H 2 O or NaSb(OH) 6 , the molecular weight is 246.78. When heated to 178.6°C, part of the structural water begins to be removed, and the structural water is almost completely removed at a constant temperature of 250°C for 2 hours to obtain sodium metaantimonate NaSbO 3 , its performance is similar to that of sodium antimonate. Sodium antimonate is a white powder with granular crystals and equiaxed crystals. High temperature resistance, no decomposition at 1000°C. Decomposes in water to form colloids. Soluble in tartaric acid, concentrated sulfuric acid, etc., slightly soluble in water, alcohol and ammonium salt, insoluble in acetic acid, dilute alkali ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01G30/02
CPCC01G30/023C01P2006/80
Inventor 陈安民
Owner 陈安民
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