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Method for preparing functional filling material of superfine calcium carbonate powder

A technology of fine calcium carbonate and filling materials, applied in the direction of calcium carbonate/strontium/barium, etc., can solve the problems of long reaction time, large product particle size, expensive production equipment, etc., achieve simple production process and equipment, and narrow particle size distribution range , low energy consumption and low cost

Inactive Publication Date: 2006-10-11
YANGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the methods commonly used in the production of fine calcium carbonate are: the first is the carbonization method. The disadvantages of this method are mainly that the production equipment (such as the carbonization tower) is relatively expensive, the operation is relatively complicated, the reaction time is long, and the production cost and energy consumption are also low. Higher, and the product particle size is too large, etc.
The second is to use the microemulsion method, that is, firstly, the Ca 2+ and CO 3 2- The solution of the ions is made into a water-in-oil microemulsion respectively, and then, certain conditions are controlled to make the two microemulsions undergo a chemical reaction, and after the solvent is removed, they are dried to obtain calcium carbonate nanoparticles; but there are raw materials in this method Disadvantages such as high cost, use of toxic organic solvents, easy pollution of the product surface, small output, and not suitable for industrial production

Method used

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  • Method for preparing functional filling material of superfine calcium carbonate powder
  • Method for preparing functional filling material of superfine calcium carbonate powder
  • Method for preparing functional filling material of superfine calcium carbonate powder

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Weigh 0.005mol of calcium chloride and sodium bicarbonate powder, add to 100mL of deionized water and stir thoroughly; put it into a microwave reactor, and react for 60 minutes under the action of a microwave with a power of 140W; suction filter the solid product, Wash with deionized water and dry to obtain the product submicron calcium carbonate powder.

[0019] Such as figure 1 , figure 2 As shown, the German Bruker D8Advance X-ray powder diffractometer (CuK α Radiation, λ = 1.5406 Ȧ) to determine the crystal structure of the prepared material; the morphology and size of the product were observed with a Tecnai 12 transmission electron microscope (TEM, 120kV) from Philips Company in the Netherlands.

[0020] The results showed that:

[0021] figure 1 : the X-ray diffraction pattern of the manufactured product of Example 1 of the present invention. All its X-ray diffraction peaks correspond to (012), (104), (006), (110), (113), (202), (024), (018) of Mitsubishi ph...

Embodiment 2

[0024] Weigh 0.005mol of calcium nitrate and sodium bicarbonate powder, add to 100mL deionized water and stir fully; put it into a microwave reactor, and react for 60 minutes under the action of a microwave with a power of 140W; suction filter the solid product, and use Wash with deionized water and dry to obtain the product submicron calcium carbonate powder.

[0025] Such as image 3 , Figure 4 As shown, the German Bruker D8 Advance X-ray powder diffractometer (CuK α Radiation, λ = 1.5406 Ȧ) to determine the crystal structure of the prepared material; the morphology and size of the product were observed with a Tecnai 12 transmission electron microscope (TEM, 120kV) from Philips Company in the Netherlands.

[0026] The results showed that:

[0027] image 3 : the X-ray diffraction pattern of the product made in Example 2 of the present invention. All its X-ray diffraction peaks correspond to (012), (104), (006), (110), (113), (202), (024), (018) of Mitsubishi phase calc...

Embodiment 3

[0030] Weigh 0.005mol of calcium acetate and sodium bicarbonate powder, add to 100mL of deionized water and stir thoroughly; put it into a microwave reactor, and react for 60 minutes under the action of a microwave with a power of 140W; suction filter the solid product, and use Wash with deionized water and dry to obtain the product submicron calcium carbonate powder.

[0031] Such as Figure 5 , Image 6 As shown, the German Bruker D8 Advance X-ray powder diffractometer (CuK α Radiation, λ = 1.5406 Ȧ) to determine the crystal structure of the prepared material; the morphology and size of the product were observed with a Tecnai 12 transmission electron microscope (TEM, 120kV) from Philips Company in the Netherlands.

[0032] The results showed that:

[0033] Figure 5 : the X-ray diffraction figure of the manufactured product of the embodiment of the present invention 3. All its X-ray diffraction peaks correspond to (012), (104), (006), (110), (113), (202), (024), (018) o...

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Abstract

The invention discloses a process for preparing functional filling material of fine calcium carbonate powder, and it is characterized in that the process comprises following steps: adding calcium chloride, calcium nitrate or calcium acetate and sodium acid carbonate with 0.001-0.007 mol into deioned water with 100 ml; stirring it; putting it into microwave reactor for chemical reaction under power of microwave with 100-200 W; sucting soild product, washing with deioned water, drying and getting said functional filling material. The invention is characterized by cheap raw materialn simple prepartion process and device, time saving, low energy consumption and cost, and product with pure diamond-shape phase, narrow granular size distribution, large specific surface area and high white content.

Description

technical field [0001] The invention relates to a preparation method of fine calcium carbonate powder as a functional filling material, belonging to the technical field of chemical industry materials. Background technique [0002] The particle size of fine calcium carbonate powder is between 0.1 and 1.0 μm. It has the characteristics of fine particles, large specific surface area and high whiteness. It is widely used in plastics, rubber, papermaking, paint, feed, ink, medicine, daily chemical industry, In industries such as glass, cement, ceramics, asphalt felt and metallurgical leather, it is an excellent filler, extender and performance improver. For example: in the field of coatings, the application of fine calcium carbonate in water-based coatings can greatly improve the thixotropy of the system, significantly improve the adhesion, scrub resistance, and stain resistance of coatings, and have good anti-settling effects; in medicine and In the field of food, fine calcium ...

Claims

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Application Information

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IPC IPC(8): C01F11/18
Inventor 张永才王根林张明
Owner YANGZHOU UNIV
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