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Micron spindle-fiber-like structure vaterite calcium carbonate preparation method

A technology of vaterite and calcium carbonate, applied in the direction of calcium carbonate/strontium/barium, etc., to achieve the effects of good repeatability, simple process and safe operation

Inactive Publication Date: 2016-03-16
TIANJIN POLYTECHNIC UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, few reports have investigated the effect of temperature on calcium carbonate crystallization

Method used

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  • Micron spindle-fiber-like structure vaterite calcium carbonate preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] ①Dissolve 0.2g of Pluronic (F127) in 25ml of deionized water / ethanol=0.5 system, place at 25°C and stir for 10min to obtain a clear and transparent liquid A.

[0022] ②Add 0.312g of sodium dodecyl sulfate (SDS) to the clear and transparent liquid A, and continue to stir at 25°C until dissolved and mixed evenly to obtain a transparent solution B.

[0023] ③ 1.11g calcium chloride (CaCl 2 ) was dissolved in 10ml of deionized water, placed in an environment of 25°C, and stirred for 10 minutes to obtain a clear and transparent solution C.

[0024] ④ 1.06g potassium carbonate (Ka 2 CO 3 ) was dissolved in 10ml of deionized water, placed in an environment of 25°C, and stirred for 10min to obtain a clear and transparent solution D.

[0025] ⑤ Quickly add solution C to solution B, and stir the mixed solution in a water bath at 50°C for 5 minutes.

[0026] ⑥ Take 5ml of solution D and add it dropwise to the above mixed solution, place the mixed solution in an environment of ...

Embodiment 2

[0029] ① Dissolve 0.2g of Pluronic (F127) in 25ml of deionized water / ethanol = 0 system, place at 25°C, and stir for 10 minutes to obtain a clear and transparent liquid A.

[0030] ②Add 0.312g of sodium dodecyl sulfate (SDS) to the clear and transparent liquid A, and continue to stir at 25°C until dissolved and mixed evenly to obtain a transparent solution B.

[0031] ③ 1.11g calcium chloride (CaCl 2 ) was dissolved in 10ml of deionized water, placed in an environment of 25°C, and stirred for 10 minutes to obtain a clear and transparent solution C.

[0032] ④ 1.06g potassium carbonate (Ka 2 CO 3 ) was dissolved in 10ml of deionized water, placed in an environment of 25°C, and stirred for 10min to obtain a clear and transparent solution D.

[0033] ⑤ Quickly add solution C to solution B, and stir the mixed solution in a water bath at 50°C for 5 minutes.

[0034] ⑥ Take 5ml of solution D and add it dropwise to the above mixed solution, place the mixed solution in an environm...

Embodiment 3

[0037] ① Dissolve 0.2g of Pluronic (F127) in 25ml of deionized water / ethanol = 0.25 system, place at 25°C, and stir for 10 minutes to obtain a clear and transparent liquid A.

[0038] ②Add 0.312g of sodium dodecyl sulfate (SDS) to the clear and transparent liquid A, and continue to stir at 25°C until dissolved and mixed evenly to obtain a transparent solution B.

[0039] ③ 1.11g calcium chloride (CaCl 2 ) was dissolved in 10ml of deionized water, placed in an environment of 25°C, and stirred for 10 minutes to obtain a clear and transparent solution C.

[0040] ④ 1.06g potassium carbonate (Ka 2 CO 3 ) was dissolved in 10ml of deionized water, placed in an environment of 25°C, and stirred for 10min to obtain a clear and transparent solution D.

[0041] ⑤ Quickly add solution C to solution B, and stir the mixed solution in a water bath at 50°C for 5 minutes.

[0042] ⑥ Take 5ml of solution D and add it dropwise to the above mixed solution, place the mixed solution in an envir...

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Abstract

The present invention relates to a calcium carbonate inorganic mineral preparation method, particularly to a micron spindle-fiber-like structure vaterite calcium carbonate crystal preparation method, which comprises: 1) dissolving pluronic (F127) in a deionized water / ethanol system having a certain ratio (V / V); 2) adding a certain amount of sodium dodecyl sulfate (SDS) to the system; 3) preparing a calcium chloride aqueous solution with a certain concentration; 4) preparing a potassium carbonate aqueous solution with a certain concentration; 5) rapidly pouring the solution in the step 3) into the solution prepared in the step 2); 6) slowly adding the solution prepared in the step 4) into the solution in the step 5) in a dropwise manner, and aging at a certain temperature; and 7) carrying out centrifugation separation on the mixing solution obtained after the aging, and washing to obtain the micron spindle-fiber-like structure vaterite calcium carbonate crystal. According to the present invention, the prepared micron spindle-fiber-like structure vaterite calcium carbonate has characteristics of good purity, high yield and good monodisperse property, the preparation reaction conditions are easy to control, and the industrial production is easily achieved.

Description

technical field [0001] The invention belongs to a method for synthesizing calcium carbonate with a special spindle-like structure, in particular to a method for preparing calcium carbonate inorganic minerals, and in particular to a method for preparing vaterite calcium carbonate crystals with a spindle-like structure. Background technique [0002] In the past few decades, calcium carbonate has attracted the interest of many researchers because of its excellent properties and wide distribution, which can provide a reliable biomineralization model for laboratory experiments. As we all know, calcium carbonate exists in nature in three forms: calcite, aragonite, and vaterite. Calcite is the most thermodynamically and kinetically stable crystalline phase, while vaterite is the least stable crystalline phase, and it can easily transform into the other two crystalline phases [S.F.Chen, S.H.Yu, J.Jiang, F.Q.Li, Y.K.Liu , Chem. Mater. 18 (2006) 115.]. [0003] Nowadays, a wide vari...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01F11/18
Inventor 储德清王澳轩孙洪明王立敏马忠超
Owner TIANJIN POLYTECHNIC UNIV
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