Method for preparing stable tin methanesulfonate solution

A technology of stannous methanesulfonate and methanesulfonic acid, which is applied in the field of preparation of stannous methanesulfonate solution, can solve the problems of turbid precipitation, affecting product use, easy oxidation and discoloration, etc., so that it is not easy to oxidize and discolor Or turbid precipitation, long shelf life, and stable product quality

Inactive Publication Date: 2014-07-30
YUNNAN TIN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The object of the present invention is to provide a kind of stannous methanesulfonate stable solution preparation method, it can overcome the stannous methanesulfonate product that existing preparation method produces It is easy to oxidi

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Example 1: Cast 500 g metal tin into two pieces with an effective area of ​​1dm 2 The polar plate is put into the electrolytic tank separated by the ion membrane, and then the concentration of 0.5wt‰ hydroquinone is added to the anode tank, and the concentration of 5wt% methanesulfonic acid is added to the anode tank. 0.5wt‰ of phenolsulfonic acid and β-naphthol concentration of 5wt% methanesulfonic acid solution was added to the cathode cell. Connect 1.5A direct current and electrolyze at room temperature for 9 hours to obtain an electrolytic solution containing 3.01% tin and 0.81% acid. After filtration, the electrolytic solution is concentrated in vacuum. The concentration time is 6 hours, and the product containing 19.76% tin and 4.95% acid is obtained as a colorless clear liquid. The cathode has no sponge tin, and the direct yield of tin is 99.1%.

Embodiment 2

[0021] Example 2: Cast 500 g metal tin into two pieces with an effective area of ​​1dm 2 The polar plate is put into the electrolysis tank separated by the ion membrane to separate the cathode and the anode, and then the concentration of 1wt‰ ascorbic acid is added to the anode tank, and the concentration of 1.1wt‰ ascorbic acid is added to the anode tank, and the addition of 1.1wt‰ ascorbic acid The concentration of aloin is 30wt% methanesulfonic acid solution added to the cathode tank. Apply 1.5A direct current, electrolyze at room temperature for 48 hours to obtain an electrolytic solution containing 15.02% tin and 4.5% acid. The electrolytic solution is concentrated in vacuum after filtration. After 3.5 hours, a colorless and clear product containing 19.8% tin and 5.93% acid was obtained. The cathode has no sponge tin, and the direct yield of tin is 99.0%.

Embodiment 3

[0022] Example 3: Cast 500 g metal tin into two pieces with an effective area of ​​1dm 2 The pole plate is put into the electrolysis tank separated by the ion membrane between the cathode and the anode, then the concentration of 15.5 wt % methanesulfonic acid solution added with 3 wt‰ ascorbic acid is added to the anode tank, and the addition of 1.2 wt ‰ of β-naphthol and gelatin with a concentration of 16.5 wt% methanesulfonic acid solution were added to the cathode cell. Connect 1.8A direct current, electrolyze at room temperature for 28 hours to obtain an electrolytic solution containing 10.4% tin and 2.62% acid. After filtration, the electrolytic solution is concentrated in vacuum. The concentration time was 3.4 hours, and a colorless and clear product containing 19.75% tin and 4.98% acid was obtained. The cathode has no sponge tin, and the direct yield of tin is 98.25%.

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Abstract

The invention belongs to the field of tin chemical engineering and in particular relates to a method for preparing a stable tin methanesulfonate solution. The method comprises the steps of preparing anode and cathode sheets from refined tin, adding stabilizers into methanesulfonic acid to prepare an anolyte, adding electroplating additives into methanesulfonic acid to prepare the catholyte, shade, separating the anolyte from the catholyte by an anion separator, preparing a crude tin methanesulfonate solution by a direct current electric melting method, and concentrating the crude tin methanesulfonate solution in vacuum under the protection of inert gas to obtain the stable tin methanesulfonate solution, wherein the stabilizers are phenol, ascorbic acid or tartaric acid and the electroplating additives are phenol sulphonic acid, latex, gelatin, cresol, aloin, cresylic acid or beta-naphthol. The stable tin methanesulfonate solution prepared by the method disclosed by the invention has the characteristics of stable quality and no precipitation, is difficult to oxidize and discolor, and has the advantages of simple preparation process, low cost, environment friendliness and the like, and good popularization and application value are achieved.

Description

Technical field [0001] The present invention is a tin chemical industry, which involves a stable method for preparing a stable methamphetamine sulfonate. Background technique [0002] Methylsulfonate is an important chemical raw material. It is mainly used for semiconductors, lineboards, connectors, wires, tin -plated steel plates, etc., and is widely used in tin -plating processes of electronic components.Compared with sulfate tin plating system, the MSA tin plating system is not only stable in acidic, neutral and alkaline solutions, but not crystal beard during the electroplating process;Compared with silicon fluorine electroplating, metal sulfonate is non -toxic, low corrosive, light -plated, good weldability, simple wastewater treatment, etc. It is the green environmental protection electroplating system that countries in the world are committed to promoting use. [0003] At present, there are many methods for the method of molecular sulfonic acid sulfate, but there are probl...

Claims

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Application Information

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IPC IPC(8): C25B3/12C25D3/32C07C309/04C25B3/13
Inventor 魏兵郭应辉胡洋李伟何兴李祥彦段富良
Owner YUNNAN TIN
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