Liquid-phase catalytic oxidation cycle method for preparing humic acid from coal residue
A technology of liquid-phase catalysis and oxidation cycle, applied in the field of applied chemistry, can solve problems such as excessive oxidation reaction, achieve the effects of reducing emissions, improving humic acid yield and resource utilization, and protecting the environment
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[0013] Example 1
[0014] (1) At room temperature, add 1 kg of weathered coal humic acid extraction residue (referred to as the primary residue) into the reaction vessel, then add 1.7 g of ferric oxide catalyst and 33 g of solid sodium hydroxide, and then add 3.3 liters of 0.6 % Hydrogen peroxide, stirred and reacted for 1 hour, and then separated the solid and liquid to obtain the humic acid solution and the secondary residue respectively. (2) Add 33 grams of solid sodium hydroxide and 3.3 liters of 0.6% hydrogen peroxide to the secondary residue, stir and react for 1 hour, and then separate the solid and liquid to obtain a humic acid solution and the tertiary residue, respectively. (3) Add 33 grams of solid sodium hydroxide and 3.3 liters of 0.6% hydrogen peroxide to the three residues, stir and react for 1 hour, and then separate the solid and liquid to obtain a humic acid solution and four residues respectively. (4) Add 33 g of solid sodium hydroxide and 3.3 liters of 0.6% hyd...
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[0015] Example 2
[0016] (1) At room temperature, add 1 kg of weathered coal humic acid extraction residue (called the primary residue) to the reaction vessel, then add 1.7 g of copper oxide catalyst and 33 g of solid sodium hydroxide, and then add 3.3 liters of 0.6% The hydrogen peroxide solution was stirred and reacted for 1 hour and then solid-liquid was separated to obtain a humic acid solution and a secondary residue. (2) Add 33 grams of solid sodium hydroxide and 3.3 liters of 0.6% hydrogen peroxide to the secondary residue, stir and react for 1 hour, and then separate the solid and liquid to obtain a humic acid solution and the tertiary residue, respectively. (3) Add 33 grams of solid sodium hydroxide and 3.3 liters of 0.6% hydrogen peroxide to the three residues, stir and react for 1 hour, and then separate the solid and liquid to obtain a humic acid solution and four residues respectively. (4) Add 33 g of solid sodium hydroxide and 3.3 liters of 0.6% hydrogen peroxide to...
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[0017] Example 3
[0018] (1) At room temperature, add 1 kg of weathered coal humic acid extraction residue (referred to as the primary residue) into the reaction vessel, then add 6.7 g of zinc oxide catalyst and 33 g of solid sodium hydroxide, and then add 3.3 liters of 0.6% The hydrogen peroxide solution was stirred and reacted for 1 hour and then solid-liquid was separated to obtain a humic acid solution and a secondary residue. (2) Add 33 grams of solid sodium hydroxide and 3.3 liters of 0.6% hydrogen peroxide to the secondary residue, stir and react for 1 hour, and then separate the solid and liquid to obtain a humic acid solution and the tertiary residue, respectively. (3) Add 33 grams of solid sodium hydroxide and 3.3 liters of 0.6% hydrogen peroxide to the three residues, stir and react for 1 hour, and then separate the solid and liquid to obtain a humic acid solution and four residues respectively. The above three consecutive liquid phase catalytic oxidation residues conv...
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