A combined purification method of process wastewater and rectification raffinate in the production process of aniline
A production process and wastewater technology, applied in chemical instruments and methods, neutralized water/sewage treatment, natural water treatment, etc., can solve the problems of strict operating environment requirements, low efficiency, high energy consumption, and reduce the difficulty of operation, The effect of reducing energy consumption, process environmental protection and energy saving
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Embodiment 1
[0045] Add 500 mL of aniline rectification raffinate, 0.25 mL of glycerol monostearate and 3150 mL of wastewater into the emulsification kettle, stir and emulsify at 30 °C for 0.8 h to obtain an emulsion with a viscosity of 3.2 mPa·s; among them, the rectification raffinate The calorific value is 30000 kJ / kg, and the COD of wastewater is 19500 mgO 2 / L.
[0046] 0.05 kg 100-200 mesh LaMnO catalyst for fluidized bed reactor pyrolysis oxidation 3 The catalyst is prepared by a sol-gel method. Weigh 0.01 mol of lanthanum nitrate and 0.01 mol of manganese nitrate dissolved in 18 mL of deionized water and stir for 0.5 h, add 0.2 mol of citric acid and stir for 0.5 h, evaporate the solvent at 80 °C to form a gel, and place the gel in 100 ℃ oven for 12 h to form a xerogel. Then the xerogel was calcined at 800 °C for 6 h to form LaMnO 3 catalyst.
[0047] 0.05 kg 40-60 mesh LaCoO as the deep catalytic oxidation catalyst in fixed bed reactor 3 The catalyst is prepared by a sol-gel...
Embodiment 2
[0051] Add 500 mL of aniline rectification raffinate, 0.80 mL of propylene glycol fatty acid ester and 2400 mL of waste water into the emulsification kettle, stir and emulsify at 35 °C for 0.8 h to obtain an emulsion with a viscosity of 30 mPa·s; among them, the calorific value of the rectification raffinate is 25000 kJ / kg, and the COD of wastewater is 28000 mgO 2 / L.
[0052] 0.05 kg 100-200 mesh LaFeO for fluidized bed reactor pyrolysis oxidation catalyst 3 The catalyst is prepared by a sol-gel method. Weigh 0.01 mol lanthanum nitrate and 0.01 mol ferric nitrate dissolved in 18 mL deionized water and stir for 0.5 h, add 0.2 mol citric acid and stir for 0.5 h, evaporate the solvent at 80 °C to form a gel, and place the gel in 100 ℃ oven for 12 h to form a xerogel. Then the xerogel was calcined at 800 °C for 6 h to form LaFeO 3 catalyst.
[0053] The deep catalytic oxidation catalyst in the fixed bed reactor is 0.05 kg 40-60 mesh LaCrO 3 The catalyst is prepared by a sol...
Embodiment 3
[0057] Add 500 mL of aniline rectification raffinate, 1.10 mL of diethylene glycol monooleate and 2050 mL of waste water into the emulsification kettle, stir and emulsify at 45 °C for 0.8 h to obtain an emulsion with a viscosity of 110 mPa·s; among them, the rectification The heat value of raffinate is 24800kJ / kg, and the COD of waste water is 11000 mgO 2 / L.
[0058] 0.05 kg 100-200 mesh LaNiO catalyst for fluidized bed reactor pyrolysis oxidation 3 The catalyst is prepared by a sol-gel method. Weigh 0.01 mol of lanthanum nitrate and 0.01 mol of nickel nitrate dissolved in 18 mL of deionized water and stir for 0.5 h, add 0.2 mol of citric acid and stir for 0.5 h, evaporate the solvent at 80 °C to form a gel, and place the gel in 100 ℃ oven for 12 h to form a xerogel. Then the xerogel was calcined at 800 °C for 6 h to form LaNiO 3 catalyst.
[0059] 0.05 kg 40-60 mesh LaCuO catalyst for deep catalytic oxidation in fixed bed reactor 3 The catalyst is prepared by a sol-gel...
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