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Preparation process of modified china-clay for inserted layer

A kaolin and modification technology, applied in the field of intercalation modified kaolin preparation, can solve problems such as a long time, and achieve the effects of reducing energy consumption, small particle size distribution, and uniform shape

Inactive Publication Date: 2005-01-05
GUANGZHOU INST OF GEOCHEMISTRY - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Secondary layer inserts mostly use organic small molecules, such as ethylene glycol, oleic acid, stearic acid, acrylamide, etc.; the traditional methods are pressurization, heating, stirring, soaking, etc., which also take a long time

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Take 20g of kaolin and uniformly disperse in 50g of DMSO in a kneading and dispersing machine to obtain a stable suspension and place it in an ultrasonic reactor with constant temperature water at 50°C for 15 minutes of defoaming. Under the condition of ultrasonic treatment for 4 hours, the obtained product was centrifuged, washed with deionized water several times, dried in vacuum at 60°C to constant weight, and crushed to obtain a white powder product. It is measured that the interlayer spacing is expanded from the original 0.724874nm to 1.126742nm, and combined with the DTA curve analysis, it is obtained that the interlayer DMSO content of kaolin is about 5% (weight ratio). At the same time, the particle size is reduced from 4.5 μm to 3 μm, and the distribution is narrowed.

Embodiment 2

[0033]Take DMSO-modified kaolin, disperse it in ethylene glycol / toluene solvent, stir it evenly to form a stable suspension, then place it in an ultrasonic instrument with constant temperature water at 50°C, first defoam for 10 minutes, mix at 20KHz, power 4.5KW The obtained product was subjected to ultrasonic treatment for 4 hours, and the obtained product was centrifuged, washed several times with deionized water, dried in vacuum at 70°C to constant weight, and crushed to obtain a white powder product. The measured interlayer spacing is 1.136023nm, and the particle size is reduced from the original 3μm to about 2μm, and the distribution is narrowed.

Embodiment 3

[0035] Take DMSO-modified kaolin, disperse it in cetyl ammonium bromide / toluene solvent, stir it evenly to form a stable suspension, put it in an ultrasonic instrument with constant temperature water at 50°C, and mix it at 35KHz, power 4.5KW After ultrasonic treatment for 4 hours, the obtained product was centrifuged, washed with deionized water several times, dried in vacuum at 60°C to constant weight, and crushed to obtain a white powder product. The measured layer spacing is 1.126523nm, and there is also a small amount of insertion at the position of 4.012562nm in the layer spacing, but the particle size distribution has not improved.

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Abstract

The invention relates to a method of preparing intercalation modified kaoline, firstly dispersing the kaoline in an intercalation agent solution to form uniform suspension serum, then making ultrasonic treatment, and finally separating, washing, drying and grinding to obtain the products, where the ultrasonic treatment: placing the suspension serum in a ultrasonic reactor, using 30-60 deg. water as medium, regulating ultrasonic frequency to 15-40 KHz, and making mixing ultrasonic treatment for 3-4 hours. It is a method of saving energy sources and benefiting environmental protection, and has high intercalation efficiency, the need time is short, on conditions of relaxative operation and environment, it can make the intercalation ratio up to above 90%.

Description

technical field [0001] The invention relates to a method for preparing intercalated modified kaolin. technical background [0002] Kaolin is an important non-metallic mineral resource. It has many valuable practical values ​​and technological properties, such as plasticity, cohesiveness, dispersion, fire resistance, insulation and chemical stability. , Rubber, refractory materials and chemical industries are indispensable mineral raw materials. my country has proven kaolin reserves of 1.432 billion tons, mainly concentrated in Guangdong (309 million tons), Fujian (111 million tons), Jiangxi (77 million tons), Hunan (54 million tons), Jiangsu (37 million tons), In addition, there are 1.67 billion tons of coal-measure kaolin, which are concentrated in Inner Mongolia, Shanxi, Shandong, Anhui, Liaoning and Shaanxi. However, due to the ore-forming process and weathering, the kaolin currently mined and processed in my country has low viscosity and low whiteness, and the product c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B33/04
Inventor 刘雪宁杨治中韩世瑞胡南
Owner GUANGZHOU INST OF GEOCHEMISTRY - CHINESE ACAD OF SCI
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