Preparation method of nano kaolin

A nano-kaolin, kaolin technology, applied in nanotechnology, chemical instruments and methods, inorganic chemistry and other directions, to achieve high feasibility, improve the high-tech content of products, and good dispersibility.

Inactive Publication Date: 2012-10-24
MINNAN NORMAL UNIV
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Problems solved by technology

[0008] The purpose of the present invention is to provide a method for solving the existing problems in th...

Method used

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Embodiment Construction

[0026] The present invention discloses a preparation method of high-grade nano-kaolin. The specific embodiment uses the raw ore of Longhai kaolin in Zhangzhou, Fujian as the main raw material. The main reactor adopts a stainless steel self-generated pressure reactor lined with polytetrafluoroethylene, and the inner tank is 200 ml. Actual accommodated volume is taken as an example to illustrate the preparation process of the present invention:

[0027] Step 1: Take 20 grams of kaolin raw ore and put it into 150 milliliters of water. The water can be ordinary tap water to reduce costs, and then carry out ordinary magnetic stirring for 30-60 minutes.

[0028] Step 2: Add 2-3 grams of iron remover, 1-1.5 grams of intercalation agent, and 1-1.2 grams of surfactant to the above mud solution, and continue stirring at room temperature for 40-60 minutes. The iron remover is oxalic acid or lemon Acid, etc., the intercalation agent is urea or thiourea or dimethyl sulfoxide, etc., and the...

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Abstract

A preparation method of nano kaolin comprises steps of: adding kaolin ore into water by a weight ratio of 1:75 for magnetic force stirring; successively adding deferrization agent, intercalator and surfactant in the slurry solution for continuous normal temperature stirring; filling the mixed solution into an autoclave, screwing a cover of the autoclave, carrying out a constant temperature hydrothermal reaction at 150-170 DEG C, and naturally cooling the autoclave to room temperature; taking out solid powder in the autoclave, and washing the solid powder till a pH of a washing liquid close to 7; and finally drying the solid powder to obtain a target nano kaolin product with high grade. The whole process of the invention has the characteristics of simple operation, low cost and strong feasibility; especially, steps of mixing the three reagents including deferrization agent, intercalator and surfactantand, with the kaolin slurry, and then conducting hydrothermal reaction obviously have advantages of simple process, high repeatability and no secondary pollution; and the nano kaolin prepared by the reparation method has a scale-like micro-morphology, large specific surface area, and good dispersibility in water.

Description

technical field [0001] The invention relates to a preparation method of kaolin, in particular to a preparation method of nanometer kaolin. Background technique [0002] Kaolin has a variety of uses. With the development of economy, the demand for kaolin in all walks of life is increasing rapidly, and the quality requirements for kaolin are getting higher and higher. Ordinary kaolin can no longer meet the needs of industry. Comprehensive development and utilization of kaolin resources It is imperative. Due to its small particle size, uniform shape, large specific surface area, high whiteness, and good dispersibility in water, nano-kaolin is widely used in rubber, plastic, paper, ink, coating, nano-ceramic, chemical fiber and other fields. prospect. Using kaolin raw ore as raw material, using a simple preparation process to produce ultra-fine nano-kaolin with good product quality and high purity has important research and development significance for increasing the added v...

Claims

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Application Information

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IPC IPC(8): C01B33/44B82Y40/00
Inventor 郭鸿旭
Owner MINNAN NORMAL UNIV
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