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Method for preparing sodium stannate

A technology of sodium stannate and tin flower, applied in chemical instruments and methods, tin compounds, inorganic chemistry, etc., can solve the problems of serious environmental pollution, high energy consumption, high cost of sodium stannate, and achieve simple preparation method and energy consumption. low effect

Inactive Publication Date: 2013-01-09
YUNNAN TIN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to overcome the existing problems of high cost, high energy consumption, and serious environmental pollution in the preparation of sodium stannate, and provide a new method for preparing sodium stannate, which has the advantages of simple preparation process, low cost, and environmental friendliness.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Add 500 g of metal tin flowers into the reactor, then add a 10% sodium hydroxide solution into the reactor, start stirring, and then add 5% hydrogen peroxide to the above system. The molar ratio of sodium hydroxide to metal tin flowers is 2:1, and the molar ratio of hydrogen peroxide to metal tin flowers is 2:1. After reacting for 1 h at a reaction temperature of 60 °C, filter, concentrate under reduced pressure, and concentrate in a vacuum. is 0.04 MPa, the temperature of the concentrated solution reaches 85°C, is filtered, and the filter cake is dried to obtain sodium stannate, and the yield of sodium stannate is 21.3%.

Embodiment 2

[0019] Add 500 g of metal tin flowers into the reactor, then add a 10% sodium hydroxide solution into the reactor, start stirring, and then add 5% hydrogen peroxide to the above system. The molar ratio of sodium hydroxide to metal tin flowers is 2:1, and the molar ratio of hydrogen peroxide to metal tin flowers is 2:1. After reacting for 3 h at a reaction temperature of 60°C, filter, concentrate under reduced pressure, and concentrate under vacuum. is 0.04 MPa, the temperature of the concentrated solution reaches 85°C, is filtered, and the filter cake is dried to obtain sodium stannate, and the yield of sodium stannate is 34.6%.

Embodiment 3

[0021] Add 500 g of metal tin flowers into the reactor, then add a 10% sodium hydroxide solution into the reactor, start stirring, and then add 10% hydrogen peroxide to the above system. The molar ratio of sodium hydroxide to metal tin flowers is 3:1, and the molar ratio of hydrogen peroxide to metal tin flowers is 2:1. After reacting for 6 h at a reaction temperature of 60°C, filter, concentrate under reduced pressure, and concentrate in a vacuum. was 0.06 MPa, the temperature of the concentrated solution reached 95 °C, filtered, and the filter cake was dried to obtain sodium stannate, and the yield of sodium stannate was 91.4%.

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Abstract

The invention provides a method for preparing sodium stannate. According to the method, banca tin, hydrogen peroxide and potassium hydroxide which serve as raw materials are synthesized in one step to form the sodium stannate. The method comprises the following steps of: putting the banca tin and 10 to 40 percent sodium hydroxide solution into a reaction kettle, stirring, adding 5 to 30 percent hydrogen peroxide into the system, and reacting at the temperature of between 60 and 100 DEG C for 1 to 6 hours; and filtering, concentrating a filtrate under reduced pressure, filtering, and drying a filter cake to obtain the sodium stannate, wherein the yield of the sodium stannate is up to 99.5 percent. The method has the characteristics of simple preparation process, energy conservation, environment friendliness and the like and can be used for industrial production, the generation of harmful gases of ammonia gas and the like is avoided, and the sodium stannate is prepared at low temperature under normal pressure.

Description

Technical field [0001] The present invention involves a preparation method of sodium tin acid, which is the field of inorganic chemical technology. Background technique [0002] Sodium tin acid is an important chemical raw material, which is widely used in electroplating, electronics, printing and dyeing industries, glass, ceramics, coin, automobile manufacturing, canned food boxes, and close instruments. [0003] At present, there are many methods for preparing sodium tin acidic acid, but there are problems such as high energy consumption, toxic raw materials, or complex preparation processes.For example, the patent literature CN101544397 revealed a method of using tin raw materials to directly produce sodium sodium, and tin and tin alloy will be chemically reacting with sodium hydroxide and sodium nitrate at 300 ° C to 600 ° C in the reactive kettle.Sodium coarse tinate, then dissolved sodium coarse acid with water, refined and purified, concentrated, separated, and dried final...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G19/00
Inventor 刘路坷贾庆明郭应辉段富良李伟李祥彦
Owner YUNNAN TIN
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