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Preparation method of stannous methanesulfonate

A technology of stannous methanesulfonate and methanesulfonic acid, which is applied in the field of stannous methanesulfonate preparation, can solve the problems of long reaction time, high reaction temperature, and many by-products, and achieve fast reaction speed and post-processing The effect of simplicity and short production cycles

Active Publication Date: 2010-06-23
宜兴方晶科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The above-mentioned preparation of stannous methanesulfonate by chemical reaction method all has the defects of high reaction temperature, long reaction time, many by-products and large energy consumption

Method used

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  • Preparation method of stannous methanesulfonate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Embodiment 1: Referring to the accompanying drawings, the method for preparing stannous methanesulfonate by electrolysis method, in the diaphragm type polypropylene outer frame electrolytic cell 1, there are high-purity tin plate anode 2 and cathode 3 with a purity of 99.9wt% oppositely arranged, and the area is They are 1dm2 respectively, the two electrodes are separated by a secondary amine type anion membrane 4, and the distance between the anode and the cathode and the ion membrane is 3cm, respectively constituting the anode chamber and the cathode chamber. Add 150.0 g of a 70 wt% methanesulfonic acid aqueous solution and 50.0 g of water to the anode chamber, and also add 150.0 g of a 70 wt% methanesulfonic acid aqueous solution and 50.0 g of water to the cathode chamber to conduct electrolysis at a constant current of 10A. The anode tin electrode gradually decreases, and the cathode evolves hydrogen. After electrolysis for a period of time, take a small amount of a...

Embodiment 2-4

[0017] Embodiment 2-4: select different shapes of tin electrodes according to table 1, wherein in the particle tin and powder tin electrolytic device, the plate graphite current collector is added, other experimental devices and process parameters are the same as in embodiment 1, and the electrolysis results are as shown in table 1. Show.

[0018] Table 1 Test comparison table of different forms of tin electrodes

[0019] Example

[0020] The results showed that there was no significant difference in electrolysis between electrodes of various shapes.

Embodiment 5-10

[0021] Example 5-10: According to Table 2, different ion exchange membranes were selected as diaphragm materials, other experimental devices and process parameters were the same as those in Example 1, and the electrolysis results were shown in Table 2.

[0022] Table 2 Test comparison table of different ion exchange membranes

[0023]

[0024] The results show that both anionic membranes and cationic membranes can be electrolyzed, but anionic membranes have better effects than cationic membranes. high, high current efficiency.

[0025] Examples 11-16: Electrolysis was performed with different current densities according to Table 3, other experimental devices and process parameters were the same as those of Example 1, and the electrolysis results were shown in Table 3.

[0026] Table 3 Comparison table of different current density tests

[0027]

[0028] The results show that the effects of various current densities are roughly similar. Obviously, if the current ...

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Abstract

The invention relates to a method for directly preparing stannous methanesulfonate through electrolytic method, which is characterized in that the electrolytic method is adopted to directly obtain the stannous methanesulfonate water solution, wherein, at least the positive electrode of the electrolysis negative electrode, positive electrode is the solid tin, the positive electrode and the negative electrode are separated through an ion exchange membrane, the electrolyte is the methylsulfonic acid water solution. Compared with the chemical synthesis, the preparation method provided by the invention has simple process, and the reaction is easy to control, the reaction speed is fast, the production period is short; compared with the stannous chloride method, the impurity content of the obtained product is less, the further separation and purification are not required, the post-processing is simple; through controlling the concentration of the electrolyte and the solid purity, the stannous methanesulfonate water solution of required purity, concentration can be directly obtained at one step.

Description

technical field [0001] The present invention is an improvement on the preparation method of stannous methanesulfonate, and particularly relates to a method for preparing stannous methanesulfonate by an electrolytic method. Background technique [0002] Stannous methanesulfonate is an important organotin compound, which is widely used in organic synthesis and tin electroplating process, such as the main salt and additive of tin plating in electroplating tin process, instead of fluoroborate as the main salt. Electroplating tin process. [0003] In the synthesis of stannous methanesulfonate, metal tin and methanesulfonic acid are used to react, but the direct reaction of metal tin and methanesulfonic acid is slow. In order to speed up the reaction, the solid-liquid two-phase reaction requires methylsulfonic acid in a reflux state. It is carried out in acid, the reaction temperature is as high as 140 ° C or more, the energy consumption is high, and the obtained product has low ...

Claims

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Application Information

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IPC IPC(8): C25B3/12C07C309/04C25B3/13
Inventor 韩彦东张文魁甘永平黄辉陶新永
Owner 宜兴方晶科技有限公司
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