Lensing spherical vaterite calcium carbonate crystal with high purity and preparation method thereof
A technology of calcium carbonate and vaterite, applied in the direction of calcium carbonate/strontium/barium, etc., to achieve strong adsorption capacity, easy control of reaction conditions, and good monodispersity
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[0051] Example 1:
[0052] (1) Add 5.299 g of sodium carbonate to 100 ml of deionized water and stir until all is dissolved to obtain a solution with a concentration of 0.5 mol / L for use.
[0053] (2) Add 5.549 g of calcium chloride to 100 ml of deionized water, and stir until all is dissolved to obtain a solution with a concentration of 0.5 mol / L for use.
[0054] (3) 0.242 g of 1-butyl-3-methylimidazole dodecyl sulfate was dissolved in 77 ml of deionized water, and stirred until all was dissolved. Adjust the pH of the solution to 7, to obtain a solution with a concentration of 7.8 mmol / L, for use.
[0055] In this step, the preparation method of 1-butyl-3-methylimidazole dodecyl sulfate is as follows: Weigh 11.86g (0.085mol) of 1-butyl-3-methylimidazole chloride and 20.32g (0.070mol) ) Sodium lauryl sulfate was dissolved in 120 ml of dichloromethane, and the resulting solution was placed in a 250 ml Erlenmeyer flask at room temperature and stirred for 3 hours. Filter the resulting...
Example Embodiment
[0057] Example 2:
[0058] Steps (1) and (2) are the same as those described in Example 1.
[0059] (3) Dissolve 0.323 g of 1-butyl-3-methylimidazole dodecyl sulfate in 77 ml of deionized water, and stir until all is dissolved. Adjust the pH of the solution to 7, to obtain a solution with a concentration of 10.4 mmol / L, for use.
[0060] (4) The preparation process is as described in step (4) in Example 1. Obtained white powdery calcium carbonate, namely monodisperse lenticular vaterite type calcium carbonate. The analysis results of the calcium carbonate powder obtained are as follows: SEM photo ( figure 2 ) Shows that the obtained calcium carbonate is lenticular particles with good monodispersity, with a diameter of about 2.2-2.8 μm and a thickness of about 1-1.5 μm. The nanosphere substructure is spherical nanoparticles with a size of about 100-130 nm. From Figure 5 The results of X-ray powder diffraction showed that there were no impurity peaks in the spectrum and the produc...
Example Embodiment
[0061] Example 3:
[0062] Steps (1) and (2) are the same as those described in step (1) (2) in Example 1.
[0063] (3) Dissolve 0.484 g of 1-butyl-3-methylimidazole dodecyl sulfate in 77 ml of deionized water, and stir until all is dissolved. Adjust the pH of the solution to 7, to obtain a solution with a concentration of 15.6 mmol / L, which is ready for use.
[0064] (4) The preparation process is as described in step (4) in Example 1. Obtained white powdery calcium carbonate, namely monodisperse lenticular vaterite type calcium carbonate. The SEM result of the obtained calcium carbonate powder is similar to the result of Example 2. From Figure 5 The results of X-ray powder diffraction showed that there were no impurity peaks in the spectrum and the product was pure vaterite.
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