Method for preparing ferric chloride
A technology of iron trichloride and iron oxide red, which is applied in the direction of ferric halide, etc., can solve the problems of high cost of ferric chloride, pollute the environment, and be harmful to health, and achieve the effects of less impurities, lower reaction temperature, and simplified production process
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Embodiment 1
[0017] Be that the hydrochloric acid 200ml of 6mol / L with concentration, convert into adding Fe by reaction formula (2) 2 o 3 It is 32g, according to Fe in iron red in Table 1 2 o 3 Content 98.9%, calculated to add by-product iron oxide red 32.4g, in order to make Fe 2 o 3 Fully react, add 33g of by-product iron oxide red, stir evenly and heat up to 60°C, then add 0.2g of hydrogen peroxide reagent with a concentration of 30% by weight and 1g of solid NaNO 2 The composite catalyst formed was stirred evenly and air was blown in, the temperature was raised to 98°C and kept for 1 hour, and then the reaction product was filtered, and the filtered solid product was dried and pulverized and then returned to the iron red silo, the filtrate was cooled to 30°C, and then in the drum Raise the temperature to 90°C under air conditions and keep it warm for 30 minutes to obtain liquid FeCl 3 Sample (see table 2), just can obtain solid FeCl as further concentrating 3 product.
Embodiment 2
[0019] Be 200ml of hydrochloric acid of 3.5mol / L with concentration, be converted into adding Fe by reaction formula (2) 2 o 3 It is 18.7g, according to Fe in iron red in Table 1 2 o 3 Content 98.9%, calculated to add by-product iron oxide red 18.9g, in order to make Fe 2 o 3 Fully react, add 20g of by-product iron oxide red, stir evenly and heat up to 70°C, then add 0.5g of hydrogen peroxide reagent with a concentration of 30% by weight and 1g of solid NaNO 2 The composite catalyst formed was stirred evenly and air was blown in, the temperature was raised to 98°C and kept for 1.5h, and then the reaction product was filtered, and the filtered solid product was dried and pulverized and then returned to the iron red silo, the filtrate was cooled to 50°C, and then Raise the temperature to 95°C under the condition of blowing air and keep it for 30min to obtain liquid FeCl 3 Sample (see table 2), just can obtain solid FeCl as further concentrating 3 product.
Embodiment 3
[0021] The residual hydrochloric acid is 11.2wt%, FeCl 2 Be 15.8wt% steel pickling waste liquid 300ml, calculate Fe by reaction formula (1) and reaction formula (2) 2 o 3 Add 2.9g, according to Fe in iron red in Table 1 2 o 3 The content is 98.9wt%, converted into adding 2.93g of by-product iron oxide red, in order to make Fe 2o 3 Fully react, add 3g of by-product iron oxide red, stir evenly and heat up to 65°C, then add 1g of hydrogen peroxide reagent with a concentration of 30% by weight and 1g of solid NaNO 2 The composite catalyst formed was stirred evenly and air was blown in, the temperature was raised to 85°C and kept for 1 hour, and then the reaction product was filtered, and the filtered solid product was dried and pulverized and then returned to the iron red silo, the filtrate was cooled to 40°C, and then in the drum Raise the temperature to 95°C under air conditions and keep it warm for 30 minutes to obtain liquid FeCl 3 Sample (see table 2), just can obtain s...
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