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Method for preparing octadecyl amine/kaolin inserted layer composition

An intercalation compound, kaolin technology, applied in silicon compounds, chemical instruments and methods, inorganic chemistry, etc., can solve problems such as unstable product performance, and achieve the effects of easy industrial production, stable performance, and easier acquisition.

Inactive Publication Date: 2010-01-06
CHINA UNIV OF GEOSCIENCES (WUHAN)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0020] From the published literature and patents, the current intercalation modification of kaolin has certain limitations: (1) the interlayer spacing of kaolin (001) has a small change, and the maximum value increases from 0.72nm to about 1.41nm; (2) ) Direct intercalation of small polar molecules is used to obtain kaolin intercalation complexes. The performance of the resulting products is unstable and is easy to wash out with water; (3) mostly inorganic modification

Method used

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  • Method for preparing octadecyl amine/kaolin inserted layer composition
  • Method for preparing octadecyl amine/kaolin inserted layer composition
  • Method for preparing octadecyl amine/kaolin inserted layer composition

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0053] Take by weighing 20 grams of made ammonium acetate / kaolin intercalation complex, then weigh 1 gram of octadecylamine ( Figure 4 ); first melt octadecylamine at 75°C, quickly add it to the ammonium acetate / kaolin intercalation compound, stir with a glass rod in an oil bath at 70°C for 1 hour, then put it in an oven at 70°C for 12 hours; take it out and cool Finally, the cooling complex is obtained; the cooling complex is washed and filtered with a mixed solution of ethanol and water with a volume ratio of 1:1, and dried in an oven at 55°C for 12 hours to obtain the octadecylamine / kaolin intercalation complex ( Figure 5 ), by X-ray diffraction (XRD) Figure 5 It can be seen that after the stearylamine molecule enters the interlayer of the ammonium acetate / kaolin intercalation structure, the (001) interlayer distance expands from 1.40nm to 8.33nm, and the intercalation rate can reach 91.7%.

Embodiment 2

[0055] Weigh 20 grams of the prepared ammonium acetate / kaolin intercalation complex, and then weigh 2 grams of octadecylamine; first melt the octadecylamine at 75° C., and then quickly add it to the ammonium acetate / kaolin intercalation complex, Stir with a glass rod in an oil bath at 70°C for 1 hour, and then put it in an oven at 70°C for 12 hours; take it out and cool it down to obtain a cooling compound; use a mixed solution of ethanol and water with a volume ratio of 1:1 for the cooling compound Washing and suction filtration, put into 55 ℃ oven and dry, promptly obtain octadecylamine / kaolin intercalation complex ( Image 6 ), by X-ray diffraction (XRD) Image 6 It can be seen that after octadecylamine molecules enter the interlayers of the ammonium acetate / kaolin intercalation structure, the (001) interlayer spacing expands from 1.40 nm to 8.71 nm, and the intercalation rate can reach 84.7%.

Embodiment 3

[0057] Take by weighing 20 grams of the prepared ammonium acetate / kaolin intercalation complex, and then weigh 3 grams of octadecylamine; first melt the octadecylamine at 75° C., and then quickly add it to the ammonium acetate / kaolin intercalation complex, Stir with a glass rod in an oil bath at 70°C for 1 hour, and then put it in an oven at 70°C for 12 hours; take it out and cool it down to obtain a cooling compound; use a mixed solution of ethanol and water with a volume ratio of 1:1 for the cooling compound Washing and suction filtration, put into 55 ℃ oven and dry, promptly obtain octadecylamine / kaolin intercalation complex ( Figure 7 ), by X-ray diffraction (XRD) Figure 7 It can be seen that after octadecylamine molecules enter the interlayers of the ammonium acetate / kaolin intercalation structure, the (001) interlayer spacing expands from 1.40 nm to 9.59 nm, and the intercalation rate can reach 93.5%.

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Abstract

The invention relates to a preparation method of kaolin organic and intercalation composite, in particular to a preparation method for octadecyl amine (ODA) / kaolin intercalation composite, which is characterized in that: the preparation method comprises the steps that: 1) producing hydrazine / kaolin intercalation composite: coal-series kaolin is selected as raw material, hydrazine hydrate solution with 17 mol / L of molar concentration is added, and the mass of the added solution is 30 to 60 percent of that of coal-series kaolin; 2) preparing ammonium acetate / kaolin intercalation composite: ammonium acetate saturated solution is added, the mass of which is 30 to 100 percent of the hydrazine / kaolin intercalation composite; 3) making octadecyl amine (ODA) / kaolin intercalation composite: octadecyl amine (ODA), the mass of which is 5 to 40 percent of the ammonium acetate / kaolin intercalation composite, is added into an oil bath pot and stirred for 1 to 2 hours at the temperature of 60 -80 DEG C, and then is sent into a baking oven to keep constant temperature for 12 to 24 hours, the temperature within the oven is 50 to 75 DEG C, a cooled composite is obtained after being taken out and cooled; mixed solution of ethanol having the volume ratio of 1:1 of the cooled composite and water is washed and filtrated, and then the obtained material is dried in a baking oven for 12 to 24 hours, and the temperature in the oven is 50 to 65 DEG C; the octadecyl amine (ODA) / kaolin intercalation composite is finally made. The method of the invention has simple technique; raw material is easily obtained; spacing of layers of kaolin structure lamellar is effectively enlarged with stable performance.

Description

technical field [0001] The invention belongs to the field of deep processing and modification of non-metallic mineral materials. Specifically, it relates to a method for preparing a kaolin organic intercalation compound. Background technique [0002] Kaolin is a common clay mineral that is widely used in papermaking, coatings, plastics, rubber, ceramics, refractories, glass fibers, building materials, chemicals, automobiles and aerospace. Kaolin in nature is mainly composed of kaolinite, which is also commonly known as kaolinite. [0003] Kaolin in nature generally needs to be processed and modified before it can be used. Using the layered structure of kaolin to carry out organic intercalation is an important method for modification. The reactions between clay minerals and organic compounds can occur through mechanisms such as adsorption, intercalation, and ion exchange. Intercalation refers to inserting a layer of other molecules or compound guests into the inorganic ho...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B33/44
Inventor 严春杰梅娟郭爱锋谌祺汪涛海书杰
Owner CHINA UNIV OF GEOSCIENCES (WUHAN)
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