Method for preparing anti-aggregation modified nano calcium carbonate

A nano-calcium carbonate, anti-agglomeration technology, applied in the direction of calcium carbonate/strontium/barium, chemical instruments and methods, calcium/strontium/barium compounds, etc. Excellent, highly active effect

Inactive Publication Date: 2019-12-20
CHANGSHU HONGYU CALCIFICATION CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Due to the ultra-fine particle size, the crystal structure and surface electronic structure of nano calcium carbonate change, resulting in quantum size effect, small size effect, surface effect and macro quantum effect that ordinary calcium carbonate does not have, so it is very easy to agglomerate, its Uneven dispersion caused by agglomeration in plastic products will seriously affect the performance of plastic preparation

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] The invention discloses a preparation method of anti-agglomeration modified nano-calcium carbonate, which specifically comprises the following steps:

[0022] (1) Calcium hydroxide solution treatment: After the quicklime is digested and reacted, the slag is removed by a vibrating screen and refined by a hydrocyclone to obtain a calcium oxide solution with a mass concentration of 8%, and then add calcium hydroxide solution to the calcium hydroxide solution. The crystal form control agent of 1% of the calcium hydroxide dry basis mass is uniformly stirred, and then ultrasonically dispersed; wherein, the crystal form control agent is a mixture of white sugar, sodium citrate and sodium sulfate;

[0023] The process conditions of the ultrasonic dispersion are: ultrasonic frequency is 20-30 kHz, room temperature, time 30 min;

[0024] (2) Carbonization treatment: under the slow stirring state of 150r / min, under the constant temperature state of 30-40°C, pass carbon dioxide gas...

Embodiment 2

[0028] The invention discloses a preparation method of anti-agglomeration modified nano-calcium carbonate, which specifically comprises the following steps:

[0029] (1) Calcium hydroxide solution treatment: After the quicklime is digested and reacted, the slag is removed by a vibrating screen and a hydrocyclone is refined to obtain a calcium oxide solution with a mass concentration of 15%, and then calcium hydroxide solution is added to the calcium hydroxide solution. The 3% crystal form control agent of the dry basis mass of calcium hydroxide is stirred evenly, and then ultrasonically dispersed; wherein, the crystal form control agent is a mixture of white sugar, sodium citrate and sodium sulfate;

[0030] The process conditions of the ultrasonic dispersion are: ultrasonic frequency is 30kHz, room temperature, time 30min;

[0031] (2) Carbonization treatment: under the slow stirring state of 250r / min, under the constant temperature state of 30-40°C, pass carbon dioxide gas i...

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Abstract

The invention discloses a method for preparing anti-aggregation modified nano calcium carbonate. The method comprises the following steps: (1) treating a calcium hydroxide solution; (2) performing carbonization treatment; (3) performing modification and suspension treatment; and (4) preparing anti-aggregation nano calcium carbonate. By adopting the method for preparing anti-aggregation modified nano calcium carbonate, due to reasonable process designing, the prepared nano calcium carbonate has excellent anti-aggregation performance, and the modified nano calcium carbonate is high in activity,good in size stability, excellent in performance and wide in market prospect.

Description

technical field [0001] The invention relates to the technical field of lime product preparation, in particular to a preparation method of anti-agglomeration modified nanometer calcium carbonate. Background technique [0002] Nano-calcium carbonate is often used as a functional filler in high-grade plastic products, which can improve the rheology of plastic masterbatch and improve its formability. When it is used as plastic filler, it has the function of toughening and reinforcing, and can improve the bending strength of plastic. , flexural modulus of elasticity, heat distortion temperature and dimensional stability, and also endows the plastic with thermal hysteresis. There are many shapes and modified products of nano-calcium carbonate, such as spindle, cubic, needle, chain and spherical. [0003] Due to the ultra-fine particle size, the crystal structure and surface electronic structure of nano calcium carbonate change, resulting in quantum size effect, small size effect,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09C1/02C09C3/00C01F11/18
CPCC01F11/181C01F11/185C01P2004/60C09C1/021C09C3/00Y02P20/54
Inventor 顾拥明
Owner CHANGSHU HONGYU CALCIFICATION CO LTD
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