Process for preparing limellar stripping nano imvite

A nano-montmorillonite and montmorillonite technology, applied in chemical instruments and methods, inorganic chemistry, non-metallic elements, etc., can solve the problems of lack of nano-features and limited application scope, and achieve the effect of improving yield and simple process

Inactive Publication Date: 2006-06-28
SHENYANG INSTITUTE OF CHEMICAL TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, montmorillonite is used as a nanomaterial. One is to modify it by intercalation. After the interlayer expands to a certain distance, it is added to the organic matter. When the organic monomer is polymerized between the layers, the sheet is further expanded and formed. To achieve the nano-exfoliation of the sheet, but the montmorillonite itself does not have nano-characteristics macroscopically before use; another preparation method of nano-montmorillonite is to acidify or ion-exchange the montmorillonite after sodium treatment, and then add Nano-dispersed montmorillonite suspension can be obtained by high-speed stirring or high-speed centrifugal sedimentation. This method only produces ultra-fine dispersion of montmorillonite, which can only be used as a solution together with impurity ions and their solvents. The scope of application very limited

Method used

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  • Process for preparing limellar stripping nano imvite
  • Process for preparing limellar stripping nano imvite
  • Process for preparing limellar stripping nano imvite

Examples

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example 1

[0028] The preparation method of exfoliated nano-montmorillonite of the present invention, it may further comprise the steps:

[0029] Organic intercalation modification of sodium-based montmorillonite by mechanochemical method: Take 20g of sodium-based montmorillonite with a cation exchange capacity of 80mmol / 100g, add it to 200ml of distilled water, and fully disperse it. : The ratio of 2 is taken in an appropriate amount, and the two are added together in the tank of the ball mill; according to the cation exchange capacity of the added montmorillonite, the organic intercalation modifier—hexadecyltrimethyl is weighed by 1.0 times of the exchange capacity Add 6.0g of ammonium bromide to 30ml of absolute ethanol, heat and stir at 80°C, pour it into the tank of the ball mill after it is completely dissolved; seal it, install the instrument, set the speed of the ball mill to 480 rpm, and reverse the time for 20 minutes. The reaction time is 60min, and organic intercalation modif...

example 2

[0033] The preparation method of exfoliated nano-montmorillonite of the present invention, it may further comprise the steps:

[0034] Use mechanochemical method to carry out organic intercalation modification to sodium-based montmorillonite: take 200ml of montmorillonite-containing sodium sulphate slurry, the cation exchange capacity of montmorillonite is 100mmol / 100g, and the ball mill corundum ball is 1.5∶2.5 : The ratio of 1.5 is taken in an appropriate amount, and the two are added together in the tank of the ball mill; according to the cation exchange capacity of the added montmorillonite, the organic intercalation modifier—octadecyltrimethyl is weighed by 1.5 times of the exchange capacity Add 12g of ammonium chloride to 50ml of absolute ethanol, heat and stir at 80°C, pour it into a ball mill jar after it is completely dissolved; seal it, install the instrument, set the speed of the ball mill to 560 rpm, reverse time to 20min, and the reaction time 120min, the organic ...

example 3

[0039] The preparation method of exfoliated nano-montmorillonite of the present invention, it may further comprise the steps:

[0040] Organic intercalation modification of sodium-based montmorillonite by mechanochemical method: Take 50g of sodium-based montmorillonite with a cation exchange capacity of 120mmol / 100g, add it to 400ml of distilled water, stir and disperse, first press the corundum balls of the ball mill into large, medium and small The ratio of 3.5:5:1.5 takes an appropriate amount and puts it into the tank of the ball mill, and then adds the sodium-based montmorillonite after stirring and dispersion into the tank of the ball mill; Weigh the organic intercalation modifier——dodecylbenzyldimethylammonium chloride 3.0g, dodecyldimethylbenzylammonium bromide 4.5g, dodecyltrimethylammonium chloride 6.0g, add the three organic intercalation modifiers into 100ml of methanol, heat and stir at 80°C, and pour it into the ball mill jar after it is completely dissolved; sea...

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Abstract

A layer stripping method for preparing nano-montmorillonite includes such steps as organic intercalating to Na-based montmorillonite by mechano-chemical method for modifying it, water washing, drying, and mechanical stripping by grinding.

Description

technical field [0001] The invention relates to a method for preparing exfoliated nano-montmorillonite, in particular to a method for preparing nano-montmorillonite by a mechanical method, and provides a method for preparing nano-montmorillonite in the fields of nanocomposite material preparation and fine chemical industry. A new approach that is efficient and easy to industrialize. Background technique [0002] Montmorillonite, also known as bentonite and microcrystalline kaolin, is named after it was first produced in Montmorillonite, France. It is a silicate clay mineral with layered structure and flaky crystals. Because of its excellent cation exchange, dispersibility, expansion, adsorption, rheology, fire resistance, etc., it is widely used in chemical, pharmaceutical, environmental protection, construction, mining, food and other fields. However, the current application is mostly limited to ordinary fillers. In fact, montmorillonite is still a mineral with a nanostruc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B33/40C01B33/44
Inventor 李三喜翟辉赵效忠伞晓广李天一曲琛李伟
Owner SHENYANG INSTITUTE OF CHEMICAL TECHNOLOGY
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