Method for preparing basic magnesium carbonate by using combinative alkali system high-salt heavy-ash mother solution
A technology of high-salt heavy ash mother liquor and magnesium carbonate, applied in directions such as magnesium carbonate, can solve the problems of long time consumption, complicated process flow and high production cost, and achieve the effects of short production cycle, simple production process and cost saving.
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Embodiment 1
[0016] (1) Dissolve industrial magnesium chloride into a 1mol / L solution and heat it to 80°C, and filter to remove insoluble matter; (2) Take high-salt heavy ash mother liquor and heat it to 50°C, keep the constant temperature for half an hour, then filter to remove calcium ion impurities; (3) the high-salt heavy ash mother liquor after filtering is added in the industrial magnesium chloride solution after filtering to make the two fully react under stirring, then the solution after the reaction is incubated for 2 hours, the add-on of high-salt heavy ash mother liquor and industrial magnesium chloride solution The molar volume ratio is 1.2; (4) The crystalline slurry is filtered, washed with deionized water, and dried at 120° C. to obtain a basic magnesium carbonate product.
[0017] After testing: the content of magnesium oxide in the obtained product is 41.2%.
Embodiment 2
[0019] (1) Dissolve industrial magnesium chloride into a 1.2mol / L solution and heat it to 90°C, then filter to remove the insoluble matter; (2) Take the high-salt heavy ash mother liquor and heat it to 60°C, keep the constant temperature for 40 minutes, then filter to remove calcium ion impurities (3) the high-salt heavy ash mother liquor after filtering is added in the industrial magnesium chloride solution after filtering to make the two fully react, then the solution after the reaction is incubated for 3 hours, the add-on of high-salt heavy ash mother liquor and industrial magnesium chloride solution The molar volume ratio is 1.5; (4) filter the crystalline slurry, wash it with deionized water, and dry it at 130° C. to obtain a basic magnesium carbonate product.
[0020] After testing: the content of magnesium oxide in the obtained product is 41%.
Embodiment 3
[0022] (1) Dissolve industrial magnesium chloride into a 1.45mol / L solution and heat it to 85°C, then filter to remove insoluble matter; (2) Take high-salt heavy ash mother liquor and heat it to 55°C, keep the temperature for 28 minutes, then filter to remove calcium ion impurities (3) the high-salt heavy ash mother liquor after filtering is added in the industrial magnesium chloride solution after filtering to make the two fully react, then the solution after the reaction is incubated for 2.5 hours, the add-on of high-salt heavy ash mother liquor and industrial magnesium chloride solution The molar volume ratio is 1.3; (4) the crystalline slurry is filtered, washed with deionized water, and dried at 125° C. to obtain a basic magnesium carbonate product.
[0023] After testing: the content of magnesium oxide in the obtained product is 41%.
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Abstract
Description
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Application Information
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