Method for extracting potassium sodium salts from m-aminophenol alkali fusion wastewater
A technology of m-aminophenol alkali and aminophenol alkali, which is applied in the field of extracting potassium and sodium salts, can solve the problems of low utilization value of recovered salt, low purity, high consumption of expensive solvents, etc., and achieves simple and easy extraction process and high extraction recovery rate , the effect of high product purity
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[0031] Example 1
[0032] The method for separating and extracting potassium and sodium from m-aminophenol alkali melting wastewater comprises the following steps:
[0033] The solid impurities and oily substances in the wastewater from alkali melting of m-aminophenol were removed by filtration, and the potassium and sodium contents were detected by flame photometer. Add 57.5g of fluosilicic acid with the content of 12% into the reaction bottle, stir at 20℃ and slowly drop 100g; of m-aminophenol alkali melting wastewater; Keeping the temperature at 20℃ and stirring for 20min;; After the reaction, the above system was filtered to obtain crude potassium fluosilicate, the filter cake was added into 50g of water, stirred evenly, and 1g of potassium chloride was added at 20℃, and the reaction temperature was 20℃ for 20min. Filtering and drying at 120℃ to obtain 10.4g of potassium fluosilicate product with purity over 99%, and the recovery rate of potassium salt over 95%; At the tempera...
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[0038] Example 2
[0039] The method for separating and extracting potassium and sodium from m-aminophenol alkali melting wastewater comprises the following steps:
[0040] The solid impurities and oily substances in the wastewater from alkali melting of m-aminophenol were removed by filtration, and the potassium and sodium contents were detected by flame photometer. Add 39.4g of fluosilicic acid with 15% content into the reaction bottle, stir at 40℃ and slowly drop 100g; of m-aminophenol alkali melting wastewater; Keeping the temperature at 40℃ and stirring for 10min;; After the reaction, the above system was filtered to obtain crude potassium fluosilicate, the filter cake was added into 70g of water, stirred evenly, and 0.9g of potassium chloride was added at 40℃, and stirred for 10min at 40℃. Filtering and drying at 120℃ to obtain 9.2g potassium fluosilicate product with purity above 99%, and the recovery rate of potassium salt is above 95%; At 40℃, 91.2g of fluosilicic acid wi...
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[0045] Example 3:
[0046] A method for separating and extracting potassium and sodium from m-aminophenol alkali melting wastewater comprises the following steps:
[0047]The solid impurities and oily substances in the wastewater from alkali melting of m-aminophenol were removed by filtration, and the potassium and sodium contents were detected by flame photometer. 18.93g of fluosilicic acid with the content of 35% was added into the reaction flask, stirred at 50℃ and slowly dropped into 100g; of m-aminophenol alkali melting wastewater; Keeping the temperature at 50℃ and stirring for 5min;; After the reaction, the above system was filtered to obtain crude potassium fluosilicate, the filter cake was added into 60g of water, stirred evenly, and then 0.85g of potassium chloride was added at 50℃ and stirred for 5min at 50℃. Filtering and drying at 120℃ to obtain 9.4g of potassium fluosilicate product with purity above 99%, and the recovery rate of potassium salt is above 95%; At 50℃, ...
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