Washing with hydrogen peroxide working solution
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I am a preparation worker at a hydrogen peroxide plant; new working solutions need to be washed with hydrogen peroxide, while recycled working solutions are usually washed with potassium carbonate. What is the difference between the two washing methods?
The new working solution is washed with hydrogen peroxide to remove reducing substances; the recovered working solution is washed with sodium hydroxide, but this results in a loss of anthraquinone. I can’t explain the specific differences clearly, as there are many reactions involving hydrogen peroxide and numerous intermediates that remain unknown.
Washing with hydrogen peroxide removes impurities that can cause its decomposition; otherwise, it may increase the decomposition in the oxidation tower and extraction tower
What is the saponification reaction? Could you explain it in detail?
The saponification reaction generally refers to the reaction of an alkali (usually a strong alkali) with an ester, resulting in the formation of an alcohol and a carboxylate salt, particularly the reaction of fats and oils with an alkali. In a narrow sense, in the context of hydrogen peroxide production, the saponification reaction is limited to the reaction between trioctyl phosphate and sodium hydroxide. It will affect the solvent ratio; you can conduct experiments to observe the changes in the solvent ratio and the distribution of total anthraquinones before and after using the alkaline cleaning solution. Only by tasting pears can one know their sourness and sweetness; only by stepping into water can one understand its depth
Our factory uses potassium carbonate as the cleaning solution – will saponification occur?
Almost all manufacturers use concentrated potassium carbonate to wash the working solution...