Method for increasing oil absorption value of calcined kaolin

A technology of calcined kaolin and oil absorption value, which is applied in the direction of coating, etc., can solve the problems of pollution, increase the complexity of production, and cannot meet the requirements of high-grade coating preparation, and achieve the effect of low cost and simple method

Active Publication Date: 2010-10-13
CHINA UNIV OF GEOSCIENCES (WUHAN) +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The oil absorption of kaolin prepared by this method has been improved, but it still cannot meet the preparation requireme...

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Heat the oil bath to 150°C, weigh 20 g of calcined kaolin powder (particle size ≤ 50 μm), and then weigh 0.020 g of anhydrous magnesium chloride powder (particle size ≤ 45 μm) and place them in a conical flask, and stir for 1 hour to obtain more High oil absorption calcined kaolin. After testing, its oil absorption value is 70.52ml / 100g.

Embodiment 2

[0019] Heat the oil bath to 150 ° C, weigh 20 g of calcined kaolin powder (particle size ≤ 50 μm), and then weigh 0.040 g of anhydrous magnesium chloride powder (particle size ≤ 45 μm) and place them in a conical flask, and stir for 1 hour to obtain more High oil absorption calcined kaolin. After testing, its oil absorption value is 72.25ml / 100g.

Embodiment 3

[0021] Heat the oil bath to 150°C, weigh 20 g of calcined kaolin powder (particle size ≤ 50 μm), and then weigh 0.080 g of anhydrous magnesium chloride powder (particle size ≤ 45 μm) and place them in a conical flask, and stir for 1 hour to obtain more High oil absorption calcined kaolin. After testing, its oil absorption value is 75.54ml / 100g.

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Abstract

The invention relates to a method for increasing oil absorption value of calcined kaolin, which comprises the following steps of: mixing the calcined kaolin and anhydrous magnesium chloride in a weight ratio of 1:(0.001-0.1), stirring the mixture for 1 to 2 hours at the constant temperature of between 50 and 200 DEG C, and cooling the stirred mixture to obtain the calcined kaolin with high oil absorption value. The method has the advantages of simpleness, convenience, low cost, no pollution and capability of obviously increasing the oil absorption value of the calcined kaolin to between 72.50 and 102.60ml/100g from 65 to 70ml/100g.

Description

technical field [0001] The invention relates to a method for increasing the oil absorption value of calcined kaolin and improving the oil absorption of calcined kaolin. Background technique [0002] Kaolin is an important additive in the field of coatings, especially in the field of high-grade coatings. However, calcined kaolin with high oil absorption value is often required in the application of coatings, and calcined kaolin is prepared by calcining kaolin at 900-1100°C. Calcined kaolin has stable physical and chemical properties, high whiteness and certain oil absorption performance, and its oil absorption value is generally between 55ml / 100g and 70ml / 100g. Due to the difference in quality and process, the oil absorption value of American calcined kaolin is relatively high, generally between 90ml / 100g and 120ml / 100g, but it is expensive. [0003] At present, there are few research reports on the methods of increasing the oil absorption value of calcined kaolin. The Chi...

Claims

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Application Information

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IPC IPC(8): C09D7/12
Inventor 郭霞严春杰蔡建万为敏仇秀梅
Owner CHINA UNIV OF GEOSCIENCES (WUHAN)
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