Synthetic method for stannous chloride
A technology of stannous chloride and synthesis method, applied in the direction of electrolysis process, electrolysis components, etc., can solve the problems of large amount of sewage, waste of resources, difficult recovery of tin-containing slag, etc., and achieves the effect of reliable process and slow reaction.
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Embodiment 1
[0014] Using 400 g to cast into two pieces with an effective area of 4dm 2 The polar plates are placed in the cathode and anode electrolytic cells separated by anion exchange membrane respectively. A 5%wt hydrochloric acid solution prepared with dilute hydrochloric acid is added to the anode tank, and 6%wt hydrochloric acid prepared with dilute hydrochloric acid is added to the cathode tank. solution. Input 1.9A / dm 2 direct current, electrolytic reaction at room temperature for 24h, to obtain tin containing 6.9%wt, hydrochloric acid is 1.8%wt stannous chloride electrolyte, the electrolyte is put into a reactor equipped with 10g tin flakes to concentrate, to obtain a specific gravity of 2.0g / cm 3 The concentrated solution, the concentrated solution is crystallized and dehydrated to obtain white crystals of stannous chloride with a main content of 99.2%, and other product indicators comply with HG / T 2526-2007.
Embodiment 2
[0016] 400 g metal tin is cast into two pieces with an effective area of 4dm 2 The polar plates are placed in the cathode and anode electrolytic cells separated by anion exchange membrane respectively, 6%wt hydrochloric acid solution prepared with dilute hydrochloric acid is added to the anode tank, and 7%wt hydrochloric acid prepared with dilute hydrochloric acid is added to the cathode tank solution. Pass through a direct current of 1.8A, and perform an electrolysis reaction at room temperature for 24 hours to obtain a stannous chloride electrolyte solution containing 6.6%wt of tin and 2.25%wt of hydrochloric acid, and the electrolyte is put into a reactor equipped with 10g of tin flakes for concentration , to obtain a specific gravity of 2.05g / cm 3 The concentrated solution, the concentrated solution is crystallized and dehydrated to obtain white crystals of stannous chloride with a main content of 99.15%, and other product indicators comply with HG / T 2526-2007.
Embodiment 3
[0018] 400 g metal tin is cast into two pieces with an effective area of 4dm 2 The polar plates are placed in the cathode and anode electrolytic cells separated by anion exchange membrane respectively, 9%wt hydrochloric acid solution prepared with dilute hydrochloric acid is added to the anode tank, and 10%wt hydrochloric acid prepared with dilute hydrochloric acid is added to the cathode tank solution. Input 1.9A / dm 2 direct current, electrolytic reaction at room temperature for 24h, to obtain the tin protochloride electrolyte solution containing 5.8%wt tin and 2.9%wt hydrochloric acid, the electrolytic solution is put into a reactor equipped with 10g tin flakes and concentrated to obtain a specific gravity of 2.1g / cm 3 The concentrated solution, the concentrated solution is crystallized and dehydrated to obtain white crystals of stannous chloride with a main content of 99.27%, and other product indicators comply with HG / T 2526-2007.
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