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Preparation method of stannous methanesulfonate

A technology of stannous methanesulfonate and aqueous solution, which is applied in the direction of electrolysis, organic chemistry, electrolysis components, etc., can solve the problems of long reaction time, high reaction temperature, and many by-products, and achieve fast reaction speed and simple post-processing , the effect of short production cycle

Inactive Publication Date: 2014-07-09
宜兴方晶科技有限公司
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  • 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
  • Preparation method of stannous methanesulfonate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Embodiment 1: referring to accompanying drawing, electrolytic method prepares stannous methanesulfonate method, in diaphragm type polypropylene outer frame electrolyzer 1, oppositely set has the high-purity tin plate anode 2 and negative electrode 3 that purity is 99.9wt%, area 1dm respectively 2 , the two electrodes are separated by a secondary amine anion membrane 4, and the distance between the anode and the cathode and the ion membrane is 3 cm, forming an anode chamber and a cathode chamber respectively. Add 150.0g of 70wt% methanesulfonic acid aqueous solution and 50.0g of water to the anode chamber, and 150.0g of 70wt% methanesulfonic acid aqueous solution and 50.0g of water into the cathode chamber, and electrolyze with 10A constant current. The tin electrode of the anode is gradually reduced, and hydrogen gas is produced at the cathode. After electrolysis for a while, take a small amount of anolyte and titrate it with calibrated sodium hydroxide solution until ...

Embodiment 2-4

[0017] Embodiment 2-4: select tin electrodes of different shapes according to Table 1, wherein in granular tin and powder tin electrolysis devices, plate-shaped graphite current collectors are added, other experimental devices and process parameters are the same as in Example 1, and the electrolysis results are shown in Table 1 Show.

[0018] Table 1 Comparison table of different forms of tin electrodes

[0019] Example

[0020] The results showed that there was no significant difference in the electrolysis of various electrode configurations.

Embodiment 5-10

[0021] Examples 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 in Example 1. The electrolysis results are shown in Table 2.

[0022] Table 2 Comparison table of different ion exchange membrane tests

[0023]

[0024] The results show that both anionic membrane and cationic membrane electrolysis can be carried out, but the anionic membrane has a better effect than the cationic membrane, and the effect of the quaternary ammonium salt anionic membrane and the secondary ammonium salt anionic membrane is better, and the obtained product concentration High, high current efficiency.

[0025] Examples 11-16: According to Table 3, different current densities were used for electrolysis, other experimental devices and process parameters were the same as in Example 1, and the electrolysis results are shown in Table 3.

[0026] Table 3 Comparison table of different cur...

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Abstract

The invention relates to a method for directly preparing stannous methanesulfonate by electrolysis, which is characterized in that an aqueous solution of stannous methanesulfonate is directly obtained by electrolysis, wherein at least the anode of the electrolysis cathode and anode is solid tin, and the anode and cathode The ion exchange membranes are used to separate them, and the electrolyte is methanesulfonic acid aqueous solution. Compared with the chemical synthesis method, it has simple process, easy control of reaction, fast reaction speed, short production cycle, less impurity content than the product obtained by stannous chloride method, no need for separate separation and purification, and simple post-treatment. By controlling the concentration of electrolyte And solid purity, one step can directly obtain the required purity, concentration of stannous methanesulfonate aqueous solution.

Description

technical field [0001] The invention is an improvement to the preparation method of stannous methanesulfonate, in particular to a method for preparing stannous methanesulfonate by electrolysis. Background technique [0002] Tin methanesulfonate is an important organic tin compound, widely used in organic synthesis and tin electroplating process, for example, as the main salt and additive of tin plating in electro tin plating process, replacing the main salt of fluoroborate electroplating process. [0003] The synthesis of stannous methanesulfonate adopts metal tin and methanesulfonic acid to react, but the direct reaction of metal tin and methanesulfonic acid is slow. Carried out in acid, the reaction temperature is as high as above 140 °C, the energy consumption is high, and the purity of the obtained product is low. After obtaining the crude product of stannous methanesulfonate, it needs to be washed with absolute ethanol, ether, etc. to obtain the stannous methanesulfona...

Claims

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Application Information

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Patent Type & Authority Patents(China)
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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