Peracetic acid solution as well as preparation method and application thereof
A technology of peracetic acid and solution, applied in the field of peracetic acid solution and preparation thereof, can solve the problems of complicated preparation process, inconvenient use of binary packaging type, unfavorable industrial production, etc., and achieves environmental friendliness, low cost, and is conducive to industrialization. production effect
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[0028] More preferably, when the reaction substrate is a mixture of acetic acid and sodium acetate, the preparation method comprises the following steps: mixing the reaction substrate with water to form a mixed solution A1; mixing an oxidant and a catalyst to form a mixed solution B1; mixing the mixed solution A1 Mix with the mixed solution B1 to form a mixed solution with a pH value of 4.0-4.5, and perform an oxidation reaction to obtain a peracetic acid solution. In this way, mixed solution A1 and mixed solution B1 initially form a mixed solution with a pH value of 4.0-4.5, the reaction between hydrogen peroxide and the reaction substrate is more complete and stable, and the conversion rate of peracetic acid is higher.
[0029] In a preferred embodiment, when the reaction substrate is acetic acid, the buffer is disodium hydrogen phosphate, the catalyst is sodium tungstate, and the pH of the reaction system is 6.2 to 6.4 during the oxidation reaction; or, the reaction substrat...
Embodiment 1
[0038] S1, add deionized water (3 mL) to acetic acid (1.0 g), stir at room temperature to form a mixed solution A, pH ≈ 2.5.
[0039] S2, add sodium tungstate dihydrate (0.11g) to hydrogen peroxide (2.3g) with a mass concentration of 30% to form a mixed solution B, add disodium hydrogen phosphate solid to the mixed solution B, and then drop the mixed solution A Add to the mixed solution B with disodium hydrogen phosphate solid to carry out the oxidation reaction, the pH value is pH ≈ 6.4. The reaction time is 15 minutes. Take the above reaction solution and dilute it 100 times, and detect it with peracetic acid detection test paper. The test paper shows that the concentration is 1000-1500 mg / L, and the conversion rate of peracetic acid is 50%-75%.
Embodiment 2
[0041] S1, add deionized water (3 mL) to sodium acetate (1.0 g), stir at room temperature to form a mixed solution A, pH ≈ 6.7.
[0042] S2, add sodium tungstate dihydrate (0.08g) to hydrogen peroxide (1.6g) with a mass concentration of 30% to form a mixed solution B, add sodium dihydrogen phosphate solid to the mixed solution B, and then add the mixed solution A to Add it to the mixed solution B added with solid sodium dihydrogen phosphate to carry out the oxidation reaction, the pH value is pH ≈ 6.4, and the reaction time is 15 minutes.
[0043] Take the above reaction solution and dilute it 100 times, and detect it with peracetic acid detection test paper. The test paper shows that the concentration is 1000-1500 mg / L, and the conversion rate of peracetic acid is 50%-75%.
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