Method and device for preparing tin methane sulfonate through hydrogen-free electrolysis

A technology of stannous methanesulfonate and methanesulfonic acid, applied in the direction of electrolysis process, electrolysis components, electrolysis organic production, etc., can solve the problems of low hydrogen explosion limit, serious environmental pollution, short production cycle, etc., and achieve energy consumption And the effect of low cost, high product purity and saving power consumption

Inactive Publication Date: 2012-10-10
宜兴方晶科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Compared with the chemical synthesis method, it has the advantages of simple process, easy control of the reaction, fast reaction speed, short production cycle, less impurity content than the product obtained by the stannous chloride method, no need for additional separation and purification, and simple post-treatment. By controlling the concentration of the electrolyte and solid purity, one step can directly obtain the require

Method used

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  • Method and device for preparing tin methane sulfonate through hydrogen-free electrolysis
  • Method and device for preparing tin methane sulfonate through hydrogen-free electrolysis
  • Method and device for preparing tin methane sulfonate through hydrogen-free electrolysis

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Embodiment 1

[0027] Example 1: A method for preparing stannous methanesulfonate by hydrogen-free electrolysis, in such as figure 1 In the shown a clean hydrogen-free electrolysis stannous methanesulfonate device, the electrolytic cell 1 is a polypropylene material plate and frame diaphragm electrolytic cell, the anode is a solid tin anode, and the anode area is 0.15m 2 , the cathode is a gas diffusion electrode, the metal conductive substrate of the gas diffusion electrode is copper mesh, the waterproof layer is carbon and polytetrafluoroethylene film, the catalytic layer is a porous carbon film, and the cathode area is 0.1m 2 , the cathode and the anode are separated by a polymer anion exchange membrane, and 2% and 30% methanesulfonic acid solutions are added to the anode chamber and the cathode chamber respectively, and electrolyzed at a constant current of 20A (gas diffusion electrode current is 200A / m 2 ), the temperature of the electrolyte is controlled at 20-30°C, the current wil...

Embodiment 2

[0028] Embodiment 2-7: By the method of embodiment 1, the gas diffusion electrode in embodiment 1 is replaced with the following electrodes of the same area respectively, electrolytically prepares stannous methanesulfonate, embodiment 2-uses tin plate; Embodiment 3-gas diffusion cathode catalysis layer containing MnO 2 Catalyst; Embodiment 4-air cathode catalytic layer contains Pt black catalyst; Metal conductive base material among the embodiment 1 is replaced copper with embodiment 5-nickel mesh, embodiment 6-titanium mesh and embodiment 7-brass mesh respectively The net prepared stannous methanesulfonate, the experimental results are shown in Table 1.

[0029]

[0030] The results compared with Example 2 show that the use of air cathode not only avoids the generation of hydrogen, but also reduces the cell voltage by 0.6-1.50V, reducing power consumption.

Embodiment 8-12

[0031] Embodiment 8-12: By the method for embodiment 1, diaphragm in embodiment 1 is replaced with the following diaphragm of same area respectively, electrolytically prepares tin protosulfonate, embodiment 8-composite anion exchange membrane, embodiment 9-porous ceramic membrane, implement Example 10-Porous PE film (thickness 1mm), porous PP film (thickness 1mm), porous PP / PE composite film (thickness 1mm), the experimental results are shown in Table 2.

[0032]

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Abstract

The invention provides a method for preparing tin methane sulfonate through hydrogen-free electrolysis, and relates to the field of manufacturing the tin methane sulfonate through industrial electrolytic synthesis and can be used for directly preparing a tin methane sulfonate solution through using an electrolytic process. According to the method provided by the invention, electrolyte is a methanesulfonic acid solution; a cathode of an electrode is a gas diffusion electrode, and an anode of the electrode is solid tin; the cathode and the anode are separated through a membrane; the electrolyte temperature is controlled within a range of 0-60 DEG C; a current density is set within a range of 10-800 A/m<2>; the electrolyte is stopped until a content of free methyl sulfuric acid in the anode electrolyte is up to 0.1-10 g/L; and the anode electrolyte is filtered and concentrated, so as to prepare the tin methane sulfonate solution with different concentrations. The method provided by the invention is suitable for being carried out at the constant temperature and the constant pressure, so that the tin methane sulfonate solution with high purity can be directly obtained. The method provided by the invention has the characteristics of being simple in process, free from separation, high in product purity, low in energy consumption and low in cost.

Description

technical field [0001] The invention relates to the field of industrial electrolytic synthesis of tin methanesulfonate, in particular to a method and a device for preparing stannous methanesulfonate by hydrogen-free electrolysis. Background technique [0002] Tin methanesulfonate is an important organotin compound, which is widely used in organic synthesis and tin plating process, and can be used as the main salt and additive of tin plating. With the rapid development of electroplating and electronics industry, the traditional electroplating tin-plating process with fluoroborate as the main salt can no longer meet the performance requirements of tin-plating electronic components. The electroplating solution for electroplating tin with tin methanesulfonate as the main salt has attracted widespread attention in recent years because of its advantages of stable solution, low toxicity, low corrosion, low foaming, no lead and fluorine toxicity, and high coating quality. [0003] ...

Claims

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Application Information

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IPC IPC(8): C25B3/12C07C309/04C25B3/13
Inventor 不公告发明人
Owner 宜兴方晶科技有限公司
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