Potassium bromate CAS# 7758-01-2

Used as an oxidizing agent, as an additive to canned food, and as a treatment agent for wool. It is commonly used as an oxidizing agent and as a reference substance in analytical chemistry for the determination of gallium by spot-drop analysis. In mercury refining, its 3% aqueous solution can be used for mercury purification. It is also used as a wool treatment agent. In the food industry, it is used as a quality improver for canned fish products and as an additive for bread making to improve the quality of flour baking. As a flour quality improver, it has oxidizing properties and makes the flour bleached; it inhibits the activity of proteolytic enzymes and improves the nature of gluten. China’s regulations can be used in wheat flour, the maximum use level 0.03g/kg, the final food must not be detected. Used as wheat flour treatment agent; dough quality improver; oxidizing agent; fish canning reformer; malt saccharification treatment agent.

Production method:

1. obtained by the decomposition of magnesium bromate and potassium chloride: Mg(BrO3)2 + 2KCl → 2KBrO3 + MgCl2 by dropping bromine into potassium hydroxide solution, which can produce both potassium bromide and potassium bromate, and then crystallize them separately (recrystallization in boiling water).
2. Bromine-potassium hydroxide method uses industrial bromine and potassium hydroxide as raw material, dissolve potassium hydroxide in 1.4 times the mass of water, pass bromine under constant stirring, soon precipitate white, i.e. potassium bromate, continue to add bromine until the liquid is pink; after cooling, separate the generated potassium bromide, then recrystallize once with water to obtain finished potassium bromate. 6KOH + 3Br2 → 5KBr + KbrO3 + 3H2O 3H2OBarium bromate method add potassium sulfate to barium bromate solution, filter to remove the barium sulfate precipitate, the filtrate is cooled, crystallized, and dried to obtain the product.
3. Electrolysis method of bromine and potassium hydroxide synthesis of potassium bromide with distilled water to dissolve into the electrolyte, electrolysis 24h out of the first batch of crude products, after every 12h to take the crude products, crude products by washing to remove potassium bromide dissolved in distilled water, add a small amount of potassium hydroxide pH 8, insulation 0.5h and then filtered, the clarified filtrate in the crystallizer cooled to room temperature, crystallization, separation, drying, the product of potassium bromate product. Its anode Br-+6OH-→BrO3-+3H2O+6e cathode 6H++6e→3H2↑KBr+3H2O→KBrO3+3H2↑Chlorine oxidation method of lime milk and bromine reaction after the passage of chlorine gas for chlorine oxidation reaction, until the pH value of 6 ~ 7 reactions is terminated. After slag removal, the filtrate is evaporated. Add barium chloride solution to react to produce barium bromate precipitate, the filtered precipitate is suspended with water, keep a certain temperature and add potassium carbonate to carry out the re-decomposition reaction, the crude potassium bromate is washed with a small amount of distilled water several times and then filtered, evaporated, cooled and crystallized, separated, dried and crushed to produce edible potassium bromate products. Its 6Ca(OH)2+6Br2→Ca(BrO3)3+5CaBr2+6H2OCaBr2+6Cl2+6Ca(OH)2→Ca(BrO3)2+CaCl2+6H2OCa(BrO3)2+BaCl2→Ba(BrO3)2↓+CaCl2Ba(BrO3)2+K2CO3→2KBrO3 +BaCO3↓