Method for removing impurity of mother liquid in preparation process of calcium carbonate crystal whisker
A calcium carbonate whisker, production process technology, applied in the direction of calcium carbonate/strontium/barium, single crystal growth, crystal growth, etc., can solve the problems of non-compliance with green chemical industry, increase production cost, environmental pollution, etc., and increase the number of cycles , Improving the purity and reducing the cost of impurity removal
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[0018] Example 1 A method for removing impurities from mother liquor in the production process of calcium carbonate whiskers, including the following steps:
[0019] (1) Put the mother liquor in the calcium carbonate whisker production process into the reactor, and add the solid barium chloride, stir and react for 0.5h at a rate of 130r / min at room temperature, and perform vacuum filtration (WLW-100 vacuum pump, pumping speed After 100L / S, rotation speed 350r / min), a mother liquor from which sulfate radicals are removed is obtained.
[0020] The composition of the mother liquor in the calcium carbonate whisker production process is (g / L): SO 4 2- 0.9696, Ca 2+ 1.12, Mg 2+ 10.1664 and a small amount of particulate impurities; the ratio of the amount of barium chloride to the amount of sulfate in the mother liquor is 0.9:1.
[0021] (2) Add decalcifying agent to the mother liquor for removing sulfate radicals, stir at 130r / min, and pass CO 2 , Stir the reaction until the pH value of th...
Example Embodiment
[0026] Embodiment 2 A method for removing impurities from mother liquor in a calcium carbonate whisker production process, including the following steps:
[0027] (1) Put the mother liquor in the calcium carbonate whisker production process into the reaction kettle, and add barium chloride solid, stir and react for 2h at a rate of 130r / min at room temperature, and vacuum filter to obtain the mother liquor from which sulfate radicals are removed.
[0028] The composition of the mother liquor in the calcium carbonate whisker production process is (g / L): SO 4 2- 0.9696, Ca 2+ 1.12, Mg 2+ 10.1664 and a small amount of particulate impurities; the ratio of the amount of barium chloride to the amount of sulfate in the mother liquor is 1:1.
[0029] (2) Add decalcifying agent to the mother liquor for removing sulfate radicals, stir at 130r / min, and pass CO 2 , Stir the reaction until the pH of the mother liquor is 7, stop the aeration, and perform vacuum filtration to obtain the mother liquor...
Example Embodiment
[0034] Embodiment 3 A method for removing impurities from mother liquor in a calcium carbonate whisker production process, including the following steps:
[0035] (1) Put the mother liquor from the calcium carbonate whisker production process into the reactor, and add barium chloride solid, stir and react for 1.5h at a rate of 130r / min at room temperature, and vacuum filter to obtain the mother liquor from which sulfate radicals are removed. .
[0036] The composition of the mother liquor in the calcium carbonate whisker production process is (g / L): SO 4 2- 0.9696, Ca 2+ 1.12, Mg 2+ 10.1664 and a small amount of particulate impurities; the ratio of the amount of barium chloride to the amount of sulfate in the mother liquor is 0.95:1.
[0037] (2) Add decalcifying agent to the mother liquor for removing sulfate radicals, stir at 130r / min, and pass CO 2 , The reaction is stirred until the pH of the mother liquor is 7, and the aeration is stopped to obtain the mother liquor from which c...
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