Method for preparing stannous oxide

A technology of stannous oxide and stannous chloride, which is applied in the direction of tin oxide, etc., can solve the problems of high turbidity of electroplating solution and affect the quality of electroplating products, and achieve the effects of simplifying production process, improving stability and improving direct yield

Inactive Publication Date: 2010-03-10
YUNNAN TIN
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Problems solved by technology

The products produced are currently mainly used to manufacture intermediates of other tin compounds. It also has another use after being dissolved in methanesulfonic acid to prepare an electroplating s

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] Weigh 360g of crystalline stannous chloride and add 300ml of water to dissolve it, add it to a 2L four-necked reaction flask, place the reaction flask on an electric heating mantle, and add 20% sodium carbonate solution under stirring conditions to neutralize, when the pH Stop adding sodium carbonate solution when the value reaches 6, heat the material, add 12% sodium hydroxide solution under stirring, adjust the pH value to 12, heat the material to boiling, carry out conversion, keep slightly boiling for 1h, wash the material, and remove Cl - , add 1.5ml antioxidant cresylsulfonic acid, filter and dry to obtain 213g of stannous oxide product, the main content is: 99.18%, Cl - : 0.016%, when the product is dissolved in 30% methanesulfonate solution, the solution is colorless and transparent, and the NTU is 21.

Embodiment 2

[0017] Weigh 500 g of crystalline tin protochloride and add 500 ml of water to dissolve it, add it to a 2L four-necked reaction flask, place the reaction flask on an electric heating mantle, and add 22% sodium carbonate solution under stirring conditions to neutralize, when the pH Stop adding sodium carbonate solution when the value reaches 7, heat the material, add 8% sodium hydroxide solution under stirring, adjust the pH value to 11, heat the material to boiling, carry out conversion, keep slightly boiling for 1h, wash the material, and remove Cl - , add 2ml of antioxidant cresyl sulfonic acid, filter and dry to obtain 296.5g of stannous oxide product, the main content is: 99.60%, Cl - : 0.018%, when the product is dissolved in 30% methanesulfonate solution, the solution is colorless and transparent, NTU is 16.

Embodiment 3

[0019] Weigh 800g of crystalline stannous chloride and add 900ml of water to dissolve it, add it to a 3L four-necked reaction flask, place the reaction flask on an electric heating mantle, and add 18% sodium carbonate solution under stirring conditions to neutralize, when the pH Stop adding sodium carbonate solution when the value reaches 7, heat the material, add 5% sodium hydroxide solution under stirring, adjust the pH value to 12, heat the material to boiling, carry out conversion, keep slightly boiling for 1h, wash the material, and remove Cl - , add 2.5ml antioxidant cresyl sulfonic acid, filter and dry to obtain 476.8g of stannous oxide product, the main content is: 99.42%, Cl - : 0.015%, when the product is dissolved in 30% methanesulfonate solution, the solution is colorless and transparent, NTU is 18.

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Abstract

The invention relates to a method for preparing an inorganic tin compound, in particular to a method for preparing stannous oxide, belonging to the technical field of chemical industries. The method comprises the following technical steps: (1) slowly adding a sodium carbonate solution into a stannous chloride solution by stirring and carrying out neutralization reaction till the pH value is 6 to 7; (2) conversion reaction: immediately heating a neutralization reaction product, adding a sodium hydroxide solution into the materials, maintaining a boiling state and converting till a white sediment is converted into a black blue sediment; (3) washing the converted product by water to remove Cl<->, washing till the concentration of the Cl<-> is smaller than 0.2 percent, and adding antioxidant;after filtering the product, heating and drying in vacuum to obtain a stannous oxide product. The method has simple operation, easy control of process parameter and low cost; the purity of the prepared stannous oxide is more than 99 percent, the Cl<-> is smaller than and equal to 0.02 percent, and the product is dissolved into 30 percent of methanesulfonic acid to obtain a clear solution.

Description

technical field [0001] The invention relates to a method for producing an inorganic tin compound, in particular to a method for producing stannous oxide, and belongs to the technical field of chemical industry. Background technique [0002] The current production method of stannous oxide usually directly utilizes sodium carbonate and stannous chloride solution to react to generate stannous oxide hydrate, and after filtering, the material is put into sodium carbonate solution for conversion, washed with water, filtered, and dried Stannous oxide products can be obtained. The products produced are currently mainly used to manufacture intermediates of other tin compounds. It also has another use after being dissolved in methanesulfonic acid to prepare an electroplating solution, but the turbidity of the electroplating solution prepared by the stannous oxide product produced according to the above method Large, seriously affecting the quality of electroplating products. Conten...

Claims

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Application Information

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IPC IPC(8): C01G19/02
Inventor 欧四梅胡洋刘路坷张建国朱金能
Owner YUNNAN TIN
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