Method for preparing catalyst for nitro reduction and application
A catalyst and nitro technology, applied in the field of preparing catalysts for nitro reduction, can solve the problems of insufficient catalyst performance, low catalyst use efficiency, insufficient stability and activity, etc., to promote hydrogen dissociation and overflow, The effect of enhancing stability and activity and reducing production cost
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[0028] Example 1
[0029] The method for preparing a catalyst for nitro reduction in this embodiment includes the following steps:
[0030] Step 1. Place 100g of activated carbon in 1000g of hydrochloric acid solution with a mass concentration of 5%, cook for 0.5h at 110°C, filter, and wash the retentate with pure water to pH 6, to obtain acid-treated activated carbon;
[0031] Step 2. Put the acid-treated activated carbon described in step one in 600g of potassium hydroxide solution with a mass concentration of 15%, cook for 0.5h at 80℃, filter, and wash the retentate with pure water to pH 8. , To obtain alkali-treated activated carbon;
[0032] Step 3. Put the alkali-treated activated carbon described in step 2 into 1500g of hydrogen peroxide with a mass concentration of 10%, cook at 100°C for 4 hours, filter, wash the retentate with pure water to pH 6, and filter to obtain the oxidized Activated carbon, mixing and beating the oxidized activated carbon with water to obtain the oxid...
Example Embodiment
[0036] Example 2
[0037] The method for preparing a catalyst for nitro reduction in this embodiment includes the following steps:
[0038] Step 1. Place 100g of activated carbon in 800g of hydrochloric acid solution with a mass concentration of 5%, cook for 0.5h at 100°C, filter, and wash the retentate with pure water to pH 6, to obtain acid-treated activated carbon;
[0039] Step 2. Place the acid-treated activated carbon described in Step 1 in 600g of potassium hydroxide solution with a mass concentration of 20%, and perform cooking treatment at 80°C for 1 hour, filter, and wash the retentate with pure water to pH 8. Obtain alkali-treated activated carbon;
[0040] Step 3. Put the alkali-treated activated carbon described in step 2 in 1500g of hydrogen peroxide with a mass concentration of 10%, cook for 3 hours at 100°C, filter, wash the retentate with pure water to pH 6, and filter to obtain the oxidized Activated carbon, mixing and beating the oxidized activated carbon with wate...
Example Embodiment
[0048] Example 3
[0049] The method for preparing a catalyst for nitro reduction in this embodiment includes the following steps:
[0050] Step 1. Place 100g of activated carbon in 600g of hydrochloric acid solution with a mass concentration of 2%, cook for 1h at 80°C, filter, and wash the retentate with pure water to pH 6, to obtain acid-treated activated carbon;
[0051] Step 2. Place the acid-treated activated carbon described in Step 1 in 500g of sodium hydroxide solution with a mass concentration of 15%, and perform cooking treatment at 70°C for 2 hours, filter, and wash the retentate with pure water to pH 8. Obtain alkali-treated activated carbon;
[0052] Step 3. Place the alkali-treated activated carbon described in Step 2 in 1000 g of nitric acid solution with a mass concentration of 5%, cook for 2 hours at 110°C, filter, wash the retentate with pure water to pH 6, and filter to obtain oxidation After activated carbon, mixing and beating the oxidized activated carbon with w...
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