Method for producing citric acid bismuth, oxalic acid bismuth and bismuth subsalicylate by electrolyzing active metal bismuth
A technology of electrolytic activation and bismuth citrate, applied in the field of producing bismuth citrate, bismuth oxalate, and bismuth subsalicylate, can solve the problems of environmentally harmful nitrogen oxides, long process flow, residual nitrate, etc., and achieve the elimination of nitrogen oxides. Emission of pollutants, high product purity, and the effect of simplifying the production process
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Embodiment 1
[0044] In a 100mL beaker, use 50mL sodium chloride aqueous solution (1% concentration by mass) as electrolyte, refined bismuth (99.99%) sheet as anode (1cm×1cm), platinum sheet (99.50%) as cathode (1cm×1cm) 1cm), through direct current electrolysis, current 0.5A. After 45 minutes, the electrolysis was stopped, and black spongy ultrafine bismuth was obtained at the cathode with a particle size distribution of 40-150nm. Take out the electrode, scrape ultrafine bismuth from the cathode into 25mL citric acid aqueous solution (25% by mass), stir vigorously until the black powder disappears, and filter the reaction mixture to obtain a white precipitate. The precipitate was washed with deionized water and then dried to obtain product 1, as shown in Table 1 below.
Embodiment 2
[0046] In a 100mL beaker, use 50mL sodium chloride aqueous solution (mass percentage concentration: 1%) as the electrolyte, use refined bismuth (99.99%) as the anode (1cm × 1cm), and nickel (99.50%) as the cathode (1cm × 1cm), through direct current electrolysis, current 0.5A. After 45 minutes, the electrolysis was stopped, and black spongy ultrafine bismuth was obtained at the cathode with a particle size distribution of 40-150nm. Take out the electrode, scrape off the ultrafine bismuth from the cathode into 25mL oxalic acid aqueous solution (9% by mass), stir vigorously until the black powder disappears, filter the reaction mixture to obtain a white precipitate, wash the precipitate with deionized water, and then dry it. Get product two, see table 1 below.
Embodiment 3
[0048] In a 100mL beaker, use 50mL potassium chloride aqueous solution (1% by mass) as the electrolyte, use refined bismuth (99.99%) as the anode (1cm×1cm), and platinum (99.50%) as the cathode (1cm×1cm). 1cm), through direct current electrolysis, current 0.5A. After 45 minutes, the electrolysis was stopped, and black spongy ultrafine bismuth was obtained at the cathode with a particle size distribution of 40-150nm. Remove the electrodes and scrape the ultrafine bismuth from the cathode into the electrolyte. Directly add 25mL salicylic acid solution (mass percentage concentration is 15%, ethanol / water mixed solvent (volume ratio is 1: 1)) in this beaker, stir vigorously until black powder disappears, filter reaction mixture and obtain white precipitation, will The precipitate was washed with deionized water and then dried to obtain product 3, as shown in Table 1 below.
[0049] The characterization of above embodiment product:
[0050] The obtained product was subjected to ED...
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