Unlock instant, AI-driven research and patent intelligence for your innovation.

Preparation method of ultra-fine active calcium carbonate

A technology of active calcium carbonate and calcium carbonate, applied in the direction of calcium carbonate/strontium/barium, chemical instruments and methods, calcium/strontium/barium compounds, etc. Play a reinforcing role and other issues to achieve high production efficiency, improve dispersion and reinforcement performance, and stable operation

Inactive Publication Date: 2018-04-27
XUANCHENG XINTAO CALCIUM CARBONATE
View PDF4 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Since calcium carbonate is a non-polar compound with strong hydrophilic and oleophobic properties, when filling various polymers, it not only has poor dispersion, but also cannot play a reinforcing role, especially when it is excessively filled, it will greatly affect the polymer. Therefore, the physical and chemical properties of calcium carbonate have restricted and limited the application field of calcium carbonate. How to improve the surface properties of calcium carbonate to overcome the shortcomings of calcium carbonate itself is the focus of people's research and development in recent years, and it is also the problem to be solved by the present invention

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Preparation method of ultra-fine active calcium carbonate

Examples

Experimental program
Comparison scheme
Effect test

specific Embodiment 1

[0032] The present invention is a kind of preparation method of superfine active calcium carbonate, comprises the following steps:

[0033] Step 1. Lime water preparation: Grind quicklime to particles with a particle size of less than 10 mesh for later use, screen to remove particles with a particle size of more than 10 mesh, and add quicklime and water with a particle size of less than 10 mesh to the dissolution tank in a weight ratio of 1:3 Dissolve under the condition of agitator stirring, stirring and dissolving. When the temperature of the suspension in the dissolution tank is measured to be 5-10°C higher than the ambient temperature, the prepared suspension is sieved through a 160-mesh sieve and enters Sedimentation tank, control suspension in the sedimentation tank for 24 hours;

[0034] Step 2. Slurry preparation: Slowly pump the uppermost layer of clear water in the sedimentation tank, and control the flow rate of the pump to 20m 3 / h, control the liquid level height...

specific Embodiment 2

[0042] The present invention is a kind of preparation method of superfine active calcium carbonate, comprises the following steps:

[0043]Step 1. Lime water preparation: Grind the quicklime until the particles with a particle size of less than 10 mesh are used for later use, screen and remove the particles with a particle size of more than 10 mesh, and add quicklime and water with a particle size of less than 10 mesh to the dissolution tank in a weight ratio of 1:4 Dissolve under the condition of agitator stirring, stirring and dissolving. When the temperature of the suspension in the dissolution tank is measured to be 5-10°C higher than the ambient temperature, the prepared suspension is sieved through a 200-mesh sieve and enters Sedimentation tank, control suspension in the sedimentation tank for 150h;

[0044] Step 2. Slurry preparation: The uppermost layer of clear water in the sedimentation tank is slowly pumped away, and the flow rate of the water pump is controlled to ...

specific Embodiment 3

[0052] The present invention is a kind of preparation method of superfine active calcium carbonate, comprises the following steps:

[0053] Step 1. Lime water preparation: Grind the quicklime until the particles with a particle size of less than 10 mesh are used for later use, screen and remove the particles with a particle size of more than 10 mesh, and add quicklime and water with a particle size of less than 10 mesh to the dissolution tank in a weight ratio of 1:4 Dissolve under the condition of agitator stirring, stirring and dissolving. When the temperature of the suspension in the dissolution tank is measured to be 5-10°C higher than the ambient temperature, the prepared suspension is sieved through a 180-mesh sieve and enters Settling tank, control the suspension in the settling tank for 60h;

[0054] Step 2. Slurry preparation: Slowly pump the uppermost layer of clear water in the sedimentation tank, and control the flow rate of the pump to 25m 3 / h, control the liqui...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
particle size (mesh)aaaaaaaaaa
Login to View More

Abstract

The invention discloses a preparation method of ultra-fine active calcium carbonate, and relates to the technical field of calcium carbonate preparation method. The preparation method comprises the following steps; step 1, allowing a suspension prepared by dissolving quick lime to stand for 12-150 h in a sedimentation tank; step 2, preparing a slurry with the calcium hydroxide concentration of 15-22 wt%; step 3, adding water to a coating agent to blend into a coating agent aqueous solution with the concentration of 5-20 wt%; step 4, adding water to an additive, and dissolving to blend into anadditive solution with the concentration of 0.5-3 wt%; step 5, sending the slurry and the additive solution into a carbonization tower and introducing carbon dioxide, and carbonizing to the pH value of 6.5-7.0; step 6, adding the coating agent aqueous solution into the calcium carbonate slurry, and carrying out coating activation treatment; and step 7, carrying out filtering drying treatment of the activated calcium carbonate. The surface of calcium carbonate is subjected to activation treatment by the coating agent, the activated calcium carbonate is prepared, and the dispersity and the reinforcing properties during filling of various polymers are improved.

Description

technical field [0001] The invention belongs to the technical field of calcium carbonate preparation methods, in particular to a preparation method of ultrafine active calcium carbonate. Background technique [0002] Ultrafine activated calcium carbonate is a very fine white powder with a particle size between 0.02-01um. Filling it in rubber and plastic can make the product surface bright, with large elongation, high tensile strength, strong tear resistance and bending resistance. , Crack performance is good. When it is combined with rubber and plastic, it increases its strength and has a large filling limit. It can make it have good gloss, transparency, stability, and quick drying when used in advanced inks and coatings. It is an ideal light-colored reinforcing filler. [0003] Since calcium carbonate is a non-polar compound with strong hydrophilic and oleophobic properties, when filling various polymers, it not only has poor dispersion, but also cannot play a reinforcing ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): C01F11/18B82Y40/00
CPCC01F11/182B82Y40/00C01F11/183C01P2004/62C01P2004/64C01P2006/80
Inventor 李涛李国庆曹晶晶展宗峥
Owner XUANCHENG XINTAO CALCIUM CARBONATE