Method for preparing high-viscosity organic bentonite by virtue of calcium-based bentonite

A calcium-based bentonite and bentonite technology, applied in chemical instruments and methods, inorganic chemistry, non-metallic elements, etc., can solve problems such as inability to effectively fix and affect the performance of organic bentonite

Active Publication Date: 2011-11-30
ZHEJIANG FENGHONG NEW MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The conventional method uses sodium carbonate as a modification agent, which can only fix Ca 2+ , Mg 2+ Plasma (and easily affected by system pH and temperature), while for some metal ions, especially Al 3+ Can not be effectively fixed, ultimately affecting the performance of organic bentonite

Method used

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  • Method for preparing high-viscosity organic bentonite by virtue of calcium-based bentonite
  • Method for preparing high-viscosity organic bentonite by virtue of calcium-based bentonite
  • Method for preparing high-viscosity organic bentonite by virtue of calcium-based bentonite

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Weigh 600g Zhejiang Anji bentonite raw ore powder, disperse in hydrochloric acid aqueous solution (30ml concentrated HCl, 1.8L water) under stirring condition, stir well, let stand at room temperature and soak for 2d, press filter and dehydrate, add 5L water to the filter cake to make slurry, Add 15.1g of sodium fluoride and 1g of tannic acid, stir for 1h at room temperature, centrifuge, and take the supernatant; heat the suspension to 50-80°C, add quaternary ammonium salt modifier, stir at constant temperature for 1h, wash, press Filtrate and dehydrate to obtain a waxy body, dry at 85°C, and pulverize to 200 mesh to obtain organobentonite AJ-1.

Embodiment 2

[0029] Weighed 600g of bentonite raw ore powder (raw ore MB 24.0%) from a place in Liaoning, and carried out the same method as in Example 1 to obtain organobentonite LN-1.

Embodiment 3

[0031] The implementation method is the same as in Example 1, using Zhejiang Anji bentonite raw ore as raw material, changing the acid solution to nitric acid solution to obtain organobentonite AJ-2.

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Abstract

The invention belongs to the field of deep processing of bentonite ore, in particular to a new method for preparing high-viscosity organic bentonite by virtue of calcium-based bentonite. The preparation method mainly comprises the following steps of: 1) acid activation: dispersing calcium-base bentonite raw mineral powder into acid liquor with certain concentration to be reacted and activated; 2)sodium treatment modification: adding specific sodium treatment modification agent into the activated bentonite, carrying out sodium treatment modification under certain condition and carrying out centrifugal purifying; and 3) organic modification: modifying the bentonite subjected to sodium treatment modification under certain condition with organic quaternary ammonium salt so as to prepare the high-viscosity organic bentonite. The preparation method provided by the invention overcomes the defect that organic bentonite gel prepared by the calcium-based bentonite has low viscosity, and surface activity of bentonite is improved by adopting an acid activation technology, thus organic bentonite with high dispersion and high viscosity performances is prepared.

Description

technical field [0001] The invention belongs to the category of deep processing of bentonite ore, and in particular relates to a new method for preparing high-viscosity organic bentonite from calcium-based bentonite. Background technique [0002] Organobentonite refers to a hydrophobic and lipophilic bentonite organic compound formed by replacing the exchangeable cations or adsorbed water between the layers of montmorillonite with organic cations or organic compounds, so that it loses or partially loses the adsorbed water. It has good colloid dispersion, thickening, thixotropy and suspension stability, and can be used as a thickening stabilizer for paints, inks, high-temperature greases, cosmetics, etc., and is suitable for oily petroleum drilling fluids and precision casting coatings, Sealing putty, glass fiber processing, etc. Organic bentonite can also be used to modify polymer plastic products such as rubber to generate nanocomposites. Organobentonite is used as a nano...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B33/44
Inventor 李静静林鸿福宋海明王晨伟叶秋杉廖永明
Owner ZHEJIANG FENGHONG NEW MATERIAL
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