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A Method of Alternating Electric Field Induced Attapulgite Mineral Crystal Bundle Depolymerization

A technology of attapulgite and alternating electric field, which is applied in chemical instruments and methods, silicon compounds, inorganic chemistry, etc., can solve problems that have not been applied before, and achieve good dispersion effect, small loss of rod crystal aspect ratio, and reproducible good sex effect

Active Publication Date: 2019-06-04
LANZHOU INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, at present, there is no relevant research report on the depolymerization of attapulgite clay rod crystal bundles and aggregates by alternating electric field, and there is no precedent for application

Method used

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  • A Method of Alternating Electric Field Induced Attapulgite Mineral Crystal Bundle Depolymerization
  • A Method of Alternating Electric Field Induced Attapulgite Mineral Crystal Bundle Depolymerization

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] After the attapulgite raw ore is crushed and squeezed against rollers, 1 kg is dispersed into 20 kg of a glycine aqueous solution with a mass concentration of 0.1% to make a suspension with a concentration of 5%, and then transferred to a container with electrodes on both sides , apply 380V and 50 Hz alternating current at both ends of the electrode, treat for 10 minutes, mechanically stir and disperse for 30 minutes, and apply an alternating electric field with an electric field strength of 2000 V / m for 30 minutes; then the suspension is swirled and classified to remove quartz sand and Large particles of impurities are finally separated by pressure filtration, dried and pulverized to obtain highly dispersed nano attapulgite. When the obtained nano-attapulgite is dispersed in water at 20%, the particle size of attapulgite in the suspension is D90 ≤ 1 micron, and the aspect ratio of attapulgite rod crystals is ≥ 32. The viscosity of nano-attapulgite 7% water suspension i...

Embodiment 2

[0023] After the attapulgite raw ore is crushed and squeezed against rollers, 1 kg is dispersed into 5 kg of ammonium phosphate aqueous solution with a mass concentration of 2.5% to make a suspension with a concentration of 20%, and then transferred to a container with electrodes on both sides Inside, apply 100V and 1200 Hz alternating current at both ends of the electrode, treat for 60 minutes, mechanically stir and disperse for 30 minutes, and then apply an alternating electric field with an electric field strength of 500 V / m for 120 minutes; then the suspension is swirled and classified to remove the quartz sand and large particle impurities, and finally carry out pressure filtration separation, drying and crushing treatment to obtain highly dispersed nano attapulgite. When the obtained nano-attapulgite is dispersed in water at 20%, the particle size of attapulgite in the suspension is D90 ≤ 1.2 microns, and the aspect ratio of attapulgite rod crystals is ≥ 31. The viscosit...

Embodiment 3

[0025] After the attapulgite raw ore is crushed and squeezed against the rollers, take 1 kg and disperse it into 10 kg of 1% alanine aqueous solution to make a suspension with a concentration of 10%, and then transfer it to a container with electrodes on both sides Inside, apply 220V and 500 Hz alternating current at both ends of the electrode, treat for 60 minutes, mechanically stir and disperse for 30 minutes, and then apply an electric field intensity of 1000 V / m alternating electric field for 60 minutes, and then classify the suspension to remove quartz sand and Large particles of impurities are finally separated by pressure filtration, dried and pulverized to obtain highly dispersed nano attapulgite. When the obtained nano-attapulgite is dispersed in water at 20%, the particle size of attapulgite in the suspension is D90 ≤ 1.3 microns, and the aspect ratio of attapulgite rod crystals is ≥ 33. The viscosity of nano-attapulgite 7% water suspension is 3310 mPa.s, which is 6....

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Abstract

The invention discloses a method for inducing attapulgite mineral crystal beams to depolymerize with an alternating electric field. Specifically, attapulgite suspending liquid is put into the alternating electric field, so that charged attapulgite mineral crystal beams or charged aggregate particles can move relatively to generate shearing force to overcome electrostatic force or van-der waals force between rod crystals in aggregates, and the attapulgite rod crystal beams and the aggregates are depolymerized into highly dispersed nano-rods. According to the method, the attapulgite mineral crystal beams and the aggregates are depolymerized through the pulse action generated by the alternating electric field, the ratio of length to diameter of the rod crystals is small, the dispersion effect is good, and a product is dispersed in nano-meter scale in real meaning; severe conditions of high temperature, high voltage and the like are not adopted in the whole technological process, and the process is simple in operation, low in cost and good in reproducibility and is safe and pollution-free; the depolymerization and the dispersion degrees of the aggregates can be controlled by adjusting the intensity and the frequency of the electric field, so that the product is good in performance and low in cost and can be used for various fields of plastics, rubber, catalysts, petrochemical engineering, environmental protection, functional materials and so on.

Description

technical field [0001] The invention relates to a method for depolymerizing attapulgite mineral crystal bundles induced by an alternating electric field, and belongs to the technical field of deep processing of natural non-metallic minerals and preparation of nanometer materials. Background technique [0002] Attapulgite, also known as palygorskite or palygorskite, is a hydrous magnesium-rich aluminum silicate clay mineral with layered chain structure, nanorod crystal morphology and nanopores. Due to its unique nano-rod crystal structure and surface properties, it exhibits excellent colloid, adsorption, carrier and reinforcement properties, and has been widely used in the fields of fine chemicals, petrochemicals, decolorization, building materials, environmental protection and functional materials. However, due to the strong van der Waals force and hydrogen bonds among the naturally produced attapulgite rod crystals, the rod crystals mainly exist in the form of stable rod cr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B33/40B82Y40/00
CPCC01B33/40C01P2002/72C01P2004/03C01P2004/61C01P2004/62C01P2006/22
Inventor 王文波王爱勤康玉茹汪琴牟斌
Owner LANZHOU INST OF CHEM PHYSICS CHINESE ACAD OF SCI