Electrolysis
By bromine synthetic potassium bromide and potassium hydroxide dissolved in distilled water dubbed electrolyte, electrolytic 24H after the first batch of crude, after every take time 12H crude, crude washed with distilled water to remove the potassium bromide solution, add a small amount potassium adjust PH value of 8, the insulation 0.5H filtered and the clear filtrate was cooled to room temperature in the mold, crystallization, separation, and drying to obtain the product potassium bromate.
Chlorine oxidation
After lime and chlorine bromine chlorine reaction leads to the oxidation reaction to PH value reaches 6-7 reaction terminated. After the slag, and the filtrate was evaporated. Barium chloride solution was added to precipitate barium bromate reaction, the precipitate was filtered after adding an aqueous suspension of potassium carbonate was added to maintain a constant temperature for the metathesis reaction, the crude potassium bromide after repeated washing with a small amount of distilled water was filtered and evaporated to cooling crystallization, separation, drying, crushed to obtain edible products of potassium bromate.
Bromide – potassium hydroxide method
With bromine and potassium hydroxide as the industrial raw material, with 1.4 times the mass of water to prepare a solution of potassium hydroxide was dissolved, stirring constantly pass into bromine. When bromine be added to a certain number, that is a white crystalline precipitate to obtain crude potassium bromate.
Continue adding bromine, until the liquid is pink so far. In bromine, while constantly adding cold water to the solution, in order to prevent overheating caused by bromine volatilization losses. Repeated recrystallization, filtration, drying, and then dissolved in deionized water, and add a small amount of potassium hydroxide to remove excess bromine synthesis, recrystallization once, finally remove the crystallization, drying derived products.
