Device for preparing stannous sulfate by electrolysis in mobile cathode chamber

A technology of stannous sulfate and cathode chamber, which is applied in electrolysis process, electrolysis components, cells, etc., can solve the problems of high voltage of stannous sulfate tank, difficult maintenance of diaphragm tank, high processing cost, etc., so as to reduce the low voltage of the tank and avoid sealing The effect of difficulty and low processing cost

Inactive Publication Date: 2011-04-20
ZHEJIANG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In order to overcome the deficiencies of high tank voltage, difficult maintenance of the diaphragm tank, and high processing cost of the existing device for preparing stannous sulfate by diaphragm electrolysis, the i

Method used

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  • Device for preparing stannous sulfate by electrolysis in mobile cathode chamber
  • Device for preparing stannous sulfate by electrolysis in mobile cathode chamber
  • Device for preparing stannous sulfate by electrolysis in mobile cathode chamber

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0030] Example 1: An electrolysis device for electrolyzing stannous sulfate in a mobile cathode chamber, attached figure 1 with figure 2 In the mobile cathode chamber electrolysis device, the electrolytic cell 1 is a rectangular cell made of polypropylene, and the movable cathode chamber 2 is composed of the cathode cavity 7, the sealing gasket 8, the diaphragm 9, and the diaphragm frame 10, which are fastened by anti-corrosion screw caps. The cathode cavity 7 and the diaphragm frame 10 are made of polypropylene material, and the two side plates of the cathode cavity 7 and the middle window of the diaphragm frame 10 are opened into a cross frame structure, which is convenient for fixing the diaphragm. Place the three cathode chambers 2 in the rectangular frame of the anode chamber 1, and hang three tin plates as cathodes 4 in the three cathode chambers respectively; hang tin plates as anodes 3 on both sides of the movable cathode chamber 2, total 4 pieces. Hang 3 cathodes on t...

Example Embodiment

[0031] Example 2: In the electrolytic cell of Example 1, the effective area of ​​the diaphragm window is 0.5m 2 , The thickness of anode 3 is 2cm and the area is 0.6m 2 , The thickness of the anode 4 is 2cm and the area is 0.6m 2 . Add 10% H in electrolyzer 1 2 SO 4 Solution, add 10% H in 1 movable cathode chamber 3 respectively 2 SO 4 The solution constitutes 2 unit electrolyzers, and each unit electrolyzer is connected in parallel. Electrolysis with a constant current of 300A (each cell current is 150A, current density is 250A / m 2 ), the electrolyte temperature is controlled at 30-40℃. Electrolysis to SnSO 4 The electrolysis ends when the content is 180-200g / L, and the cell voltage is 1.5-2.5V. Pump out the anolyte, filter to remove a small amount of precipitate, concentrate in vacuum and crystallize to obtain SnSO 4 The product has a purity of 99.4%. The current efficiency is 93.1%.

Example Embodiment

[0032] Example 3: According to the method of Example 2, 10 movable cathode chambers 3 are placed in the electrolysis cell 1, a total of 20 unit electrolysis cells, and the unit electrolysis cells are connected in parallel. The anolyte and the storage tank constitute a circulation, and the catholyte and the pump constitute a circulation. Add 10% H in the anode and catholyte storage tanks 2 SO 4 Solution (anode electrolyte containing crystallization mother liquor), electrolysis with a constant current of 3000A (single cell current 150A, current density 250A / m 2 ), the electrolyte temperature is controlled at 30-40℃. Electrolysis to SnSO 4 The electrolysis ends when the content is 180-200g / L, and the cell voltage is 1.5-2.5V. Pump out the anolyte, filter to remove a small amount of precipitate, concentrate in vacuum and crystallize to obtain SnSO 4 The product, the output is 1360kg / day, and the purity is 99.4%. The current efficiency is 92.1%.

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Abstract

The invention discloses a device for preparing stannous sulfate by electrolysis in a mobile cathode chamber. The device comprises an electrolytic bath and anodes and a cathode arranged in the electrolytic bath, wherein the anodes are arranged on two sides of the cathode respectively; a diaphragm is arranged between the cathode and the anode; and the mobile cathode chamber is formed in the electrolytic unit bath, the mobile cathode chamber is positioned between two adjacent anodes, the mobile cathode chamber comprises a cathode cavity and diaphragm frames, the cathode is positioned in the cathode cavity, the diaphragm frames are arranged on two sides of the cathode cavity, the diaphragms are positioned in the diaphragm frames, and a sealing washer is arranged between the diaphragm frame and the cathode cavity. The invention provides the device for preparing the stannous sulfate by electrolysis in the mobile cathode chamber, which reduces the voltage of the bath, is convenient for diaphragm maintenance and bath maintenance and reduces the processing cost.

Description

technical field [0001] The invention relates to a device for preparing stannous sulfate by electrolysis. Background technique [0002] Stannous sulfate is a white powdery crystal, easily soluble in water at room temperature. As an important inorganic chemical raw material, stannous sulfate is widely used in acid plating of alloys, tinplate, cylinder pistons, steel wires, etc., as well as bright tin plating of electronic devices, decorative color plating of aluminum alloys, electroplating of electronic components, and aluminum alloy products. Oxidative coloring and mordant in printing and dyeing industry. In recent years, sulfuric acid has been used as an additive for cement calcination to prepare "green" environmentally friendly cement, which can inhibit the volatilization of heavy metal components in the cement production process, thereby reducing environmental pollution. [0003] The preparation method of stannous sulfate can be roughly divided into chemical method and e...

Claims

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Application Information

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IPC IPC(8): C25B1/00C25B9/06C25B9/17
Inventor 甘永平张文魁黄辉陶新永
Owner ZHEJIANG UNIV OF TECH
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