Detection method of demanded quantity of hydrogen peroxide in iron removing process of concentrated waste acid
A detection method and technology of hydrogen peroxide, applied in the direction of chemical analysis using titration method, can solve problems such as waste of resources and poor iron removal effect.
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Embodiment 1
[0032] Measure 1000ml concentrated spent acid (H 2 SO 4 %=53.0%, Fe%=0.6%) in a 2000ml beaker; take 10mL hydrogen peroxide in the burette, ensure sufficient stirring conditions and add dropwise to the fresh hydrogen peroxide used in the production line (H 2 o 2 %=27%), the hydrogen peroxide should not touch the beaker wall during the dropping process, after the color of the waste acid solution turns light yellow, slow down the speed of adding hydrogen peroxide until the last drop of hydrogen peroxide turns the color of the solution into a bright orange red, stop adding immediately Hydrogen peroxide, add 5.0 ml of hydrogen peroxide in total at this time, and by calculation, the optimal amount of hydrogen peroxide for the concentrated waste acid iron removal is 5.0 ml / L, that is, the volume ratio is 0.5%.
Embodiment 2
[0034] Measure 1000ml concentrated spent acid (H 2 SO 4 %=53.0%, Fe%=1.0%) in a 2000ml beaker; take 10mL of hydrogen peroxide in the burette, ensure sufficient stirring conditions and add dropwise to the fresh hydrogen peroxide used in the production line (H 2 o 2%=27%), the hydrogen peroxide should not touch the wall of the beaker during the dropping process, after the color of the waste acid solution turns light yellow, slow down the speed of adding hydrogen peroxide until the last drop of hydrogen peroxide turns the color of the solution into bright orange red, stop adding hydrogen peroxide immediately At this time, a total of 8.2 ml of hydrogen peroxide was added. By calculation, the optimal amount of hydrogen peroxide for the concentrated waste acid removal of iron was 8.2 ml / L, that is, the volume ratio was 0.82%.
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