Wet surface treatment process for calcium carbonate

A technology of wet processing and calcium carbonate, which is applied in the treatment of dyed low-molecular organic compounds, dyed high-molecular organic compounds, and fibrous fillers. cost effect

Inactive Publication Date: 2018-05-18
XUANCHENG XINTAO CALCIUM CARBONATE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The existing surface treatment methods of calcium carbonate are mainly divided into wet treatment and dry treatment. The existing surface treatment process of calcium carbonate is cumbersome and the production cost is high.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Step 1, material selection: choose calcium carbonate with an average particle size of about 50nm, and its crystal structure is calcite type;

[0020] Step 2, stirring: put 10kg of calcium carbonate powder into the reactor to make a calcium carbonate suspension with a solid concentration of 12%, keep the temperature of the calcium carbonate suspension in the range of 80°C, and control the stirring speed of the stirring paddle ;

[0021] Step 3, adding sodium stearate modifier: keep the temperature and stirring speed of the calcium carbonate suspension in step 2 constant, add modifier dosage and calcium carbonate dosage ratio is 1 / 100g, and reaction time is 30min;

[0022] Step 4, washing and drying: filter the slurry while it is hot, wash the filter cake, remove unreacted modifier, and obtain active calcium carbonate powder after drying.

Embodiment 2

[0024] Step 1, material selection: choose calcium carbonate with an average particle size of about 50nm, and its crystal structure is calcite type;

[0025] Step 2, stirring: put 10kg of calcium carbonate powder into the reactor to make a calcium carbonate suspension with a solid concentration of 12%, keep the temperature of the calcium carbonate suspension in the range of 80°C, and control the stirring speed of the stirring paddle ;

[0026] Step 3, add sodium stearate modifier: keep the temperature and stirring speed of the calcium carbonate suspension in step 2 constant, add modifier dosage and calcium carbonate dosage ratio be 2 / 100g, reaction time is 30min;

[0027] Step 4, washing and drying: filter the slurry while it is hot, wash the filter cake, remove unreacted modifier, and obtain active calcium carbonate powder after drying.

Embodiment 3

[0029] Step 1, material selection: choose calcium carbonate with an average particle size of about 50nm, and its crystal structure is calcite type;

[0030] Step 2, stirring: put 10kg of calcium carbonate powder into the reactor to make a calcium carbonate suspension with a solid concentration of 12%, keep the temperature of the calcium carbonate suspension in the range of 80°C, and control the stirring speed of the stirring paddle ;

[0031] Step 3, adding sodium stearate modifier: keep the temperature and stirring speed of the calcium carbonate suspension in step 2 constant, add modifier dosage and calcium carbonate dosage ratio to be 3 / 100g, and the reaction time is 30min;

[0032] Step 4, washing and drying: filter the slurry while it is hot, wash the filter cake, remove unreacted modifier, and obtain active calcium carbonate powder after drying.

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Abstract

The invention discloses a wet surface treatment process for calcium carbonate, which relates to the technical field of surface treatment for calcium carbonate. The wet surface treatment process for calcium carbonate comprises choice of material, agitation, addition of modifier and washing and drying. The steps are as follows: choice of material: the average grain size of chosen calcium carbonate is about 30nm to 70nm, and the crystal form structure is the form of calcite; agitation: the calcium carbonate powder is put into a reaction kettle, so that a calcium carbonate suspension is prepared,the temperature of the calcium carbonate suspension is kept within a range from 70 to 80 DEG C, and the agitation speed of agitating blades is controlled; addition of modifier: the temperature of thecalcium carbonate suspension and the agitation speed in step 2 are kept unchanged, the ratio of the dosage of added modifier to the dosage of the calcium carbonate is 1-4/100g, and reaction time is within a range from 20 to 30 minutes; and washing and drying: the hot slurry is filtered, the filter cake is washed to remove the unreacted modifier, and after drying, active calcium carbonate powder isobtained. The operation process of the wet surface treatment method disclosed by invention is simple, and in the process of treatment, an activator can more uniformly wrap the surface of calcium carbonate.

Description

technical field [0001] The invention belongs to the technical field of calcium carbonate surface treatment, in particular to a calcium carbonate surface wet treatment process. Background technique [0002] As a high-grade filler with high filling content, active calcium carbonate is widely used in rubber, plastic, plastic-steel doors and windows, PVC cable materials, advanced coatings, pipes, tires, shoe soles, polyethylene blown film, sealing strips, glass steel products, cable packaging cloth , papermaking, building materials, ink, daily chemicals, textiles, feed, food additives and other industries. [0003] Activated calcium carbonate is used as the base material, and it is made by modifying and activating the surface of inorganic powder by using multi-functional surfactant and compound high-efficiency processing aid. After modification, the calcium carbonate powder forms a special cladding structure on the surface, which can significantly improve the dispersion and aff...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09C1/02C09C3/08C09C3/10
Inventor 李涛李国庆曹晶晶展宗峥
Owner XUANCHENG XINTAO CALCIUM CARBONATE
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