Method for removing impurity of mother liquid in preparation process of calcium carbonate crystal whisker
A calcium carbonate whisker and production process technology, applied in the direction of calcium carbonate/strontium/barium, single crystal growth, crystal growth, etc., can solve the problems of non-conforming to 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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Embodiment 1
[0018] The impurity removal method of mother liquor in a kind of calcium carbonate whisker production technology of embodiment 1 comprises the following steps:
[0019] (1) Put the mother liquor in the calcium carbonate whisker production process into the reaction kettle, and add barium chloride solid, stir and react at a rate of 130r / min for 0.5h at normal temperature, and carry out vacuum filtration (WLW-100 vacuum pump, pumping speed 100L / S, after rotating speed 350r / min), obtain the mother liquor that removes sulfate radical.
[0020] Wherein the mother liquor composition 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 particle impurities; the ratio of barium chloride to the amount of sulfate in the mother liquor is 0.9:1.
[0021] (2) Add calcium remover to the mother liquor for removing sulfate radicals, stir at a speed of 130r / min, and feed CO 2 , stirred and reacted until the pH value of...
Embodiment 2
[0026] The impurity removal method of mother liquor in a kind of calcium carbonate whisker production technology of embodiment 2 comprises the following steps:
[0027] (1) Put the mother liquor in the calcium carbonate whisker production process into the reactor, add barium chloride solid, stir and react at a rate of 130r / min for 2h at normal temperature, and vacuum filter to obtain the mother liquor that removes sulfate radicals.
[0028] Wherein the mother liquor composition 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 barium chloride to the amount of sulfate in the mother liquor is 1:1.
[0029] (2) Add calcium remover to the mother liquor for removing sulfate radicals, stir at a speed of 130r / min, and feed CO 2 , stirring and reacting until the pH value of the mother liquor is 7, stop the aeration, and perform vacuum filtration to obtain the mother liq...
Embodiment 3
[0034] The impurity removal method of mother liquor in a kind of calcium carbonate whisker production technology of embodiment 3 comprises the following steps:
[0035] (1) Put the mother liquor in the calcium carbonate whisker production process into the reactor, and add barium chloride solid, stir and react at a rate of 130r / min for 1.5h at normal temperature, after vacuum filtration, obtain the mother liquor that removes the sulfate radical .
[0036] Wherein the mother liquor composition 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 barium chloride to the amount of sulfate in the mother liquor is 0.95:1.
[0037] (2) Add calcium remover to the mother liquor for removing sulfate radicals, stir at a speed of 130r / min, and feed CO 2 , stirring and reacting until the pH value of the mother liquor is 7, stop the ventilation, and obtain the mother liquor from...
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