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Preparation method of ultra-dispersed functional calcium carbonate

A functional calcium carbonate, ultra-dispersion technology, applied in the direction of calcium carbonate/strontium/barium, chemical instruments and methods, calcium/strontium/barium compounds, etc., can solve the problems of different effects, to achieve increased whiteness, increased toughness, The effect of low oil absorption value

Pending Publication Date: 2022-05-10
河北立信新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

When calcium carbonate with different shapes is used as a plastic additive, the effect achieved is different.

Method used

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  • Preparation method of ultra-dispersed functional calcium carbonate
  • Preparation method of ultra-dispersed functional calcium carbonate
  • Preparation method of ultra-dispersed functional calcium carbonate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Embodiment 1 A kind of preparation method of hyperdispersion functional calcium carbonate

[0032] The present embodiment is a kind of preparation method of ultra-dispersed functional calcium carbonate, and concrete preparation process comprises the following steps of carrying out successively:

[0033] 1) Take 1kg of calcium oxide and add it to 7kg of water at a temperature of 85°C for digestion to obtain a slurry;

[0034] Turn on the excitation current, adjust the magnetic separation intensity of the magnetic separator to 150mT, and start injecting the slurry for magnetic separation;

[0035] After the slurry is magnetically separated, collect the effluent and inject it into the magnetic separator again for repeated magnetic separation, and collect the effluent that repeats the magnetic separation more than 2 times (this embodiment undergoes 2 magnetic separations), which is the calcium hydroxide slurry.

[0036] After the magnetic separator effectively absorbs most...

Embodiment 2～6

[0042] The preparation method of embodiment 2~6 hyperdispersion functional calcium carbonate

[0043] Embodiments 2 to 6 are respectively a preparation method of hyperdispersed functional calcium carbonate, and their steps are basically the same as in Example 1, the difference is only in the amount of raw materials and process parameters, see Table 1 for details:

[0044] List of each technological parameter in table 1 embodiment 2~6

[0045]

[0046]

[0047] The content of the other parts of Examples 2-6 is the same as that of Example 1.

experiment example 1

[0048] Experimental Example 1 Performance Measurement of Ultra-dispersed Functional Calcium Carbonate

[0049] Comparative example 1~4 is the comparative test of the hyperdispersion functional calcium carbonate preparation process in embodiment 1, and difference is only in:

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Abstract

The invention provides a preparation method of ultra-dispersed functional calcium carbonate, and belongs to the technical field of nano material preparation, the preparation method comprises the following steps: carrying out digestion reaction on calcium oxide and water, carrying out magnetic separation enrichment on the obtained slurry through a magnetic separator, collecting the outflow calcium hydroxide slurry, and carrying out aging reaction, sieving and water addition dilution to prepare a calcium hydroxide suspension; 2-amino-2-methyl propanol is added into the calcium hydroxide suspension, carbon dioxide gas is introduced for a carbonization reaction, when the pH value of a reaction system is reduced to 6.5-7.0, the carbonization reaction is stopped, and obtained calcium carbonate slurry is dehydrated, dried, smashed and screened to obtain the ultra-dispersed functional calcium carbonate. The cubic ultra-dispersed functional calcium carbonate is prepared by adding the 2-amino-2-methyl propanol, and the cubic ultra-dispersed functional calcium carbonate is large in specific surface area, good in dispersity, not prone to agglomeration and low in oil absorption value.

Description

technical field [0001] The invention relates to a preparation method of calcium carbonate, in particular to a preparation method of ultra-dispersed functional calcium carbonate. Background technique [0002] Light calcium carbonate has various shapes such as cubic, spindle, chain, needle, flake, spherical, etc. The preparation methods of calcium carbonate with different shapes and crystal forms are different, and the corresponding application fields and functions are also different. Light calcium carbonate has the advantages of high whiteness, high purity, good dispersion, high compatibility and rheology, and can partially replace semi-reinforcing carbon black and white carbon black products. Nano-calcium carbonate is used as a filler for plastics, rubber and paper, and has a semi-reinforcing effect. Moreover, nano-calcium carbonate has better dispersion after surface treatment, and it is more cost-effective for fillers. [0003] As an excellent additive for plastic product...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01F11/18B82Y40/00C08K3/26
CPCC01F11/183C01F11/181B82Y40/00C08K3/26C01P2004/38C01P2004/64C08K2003/265Y02P20/141
Inventor 许会成赵章李冠韬杜宇花婷许坤董德英张马利陈志勇
Owner 河北立信新材料科技有限公司
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