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Method for preparing single crystal dispersed nanometer attapulgite through ion liquid synergetic high-pressure homogenizing treatment

A nano attapulgite, ionic liquid technology, applied in nanotechnology, chemical instruments and methods, inorganic chemistry and other directions, can solve problems such as changing the affinity and hydrophobic properties, and achieve the effects of stable quality, simple and easy process, and high purity

Active Publication Date: 2017-09-22
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

In recent years, there has been a patent disclosure (CN 104399527B) for preparing catalysts with ionic liquids and attapulgite, and a patent disclosure for changing the surface affinity of attapulgite with ionic liquids (CN 101469145), but the special charge characteristics of ionic liquids have not yet been utilized. Synergistic high-pressure homogeneous depolymerization of attapulgite crystal beams to prepare single crystal dispersed nano-attapulgite research reports and technical application precedents

Method used

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  • Method for preparing single crystal dispersed nanometer attapulgite through ion liquid synergetic high-pressure homogenizing treatment
  • Method for preparing single crystal dispersed nanometer attapulgite through ion liquid synergetic high-pressure homogenizing treatment

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] After crushing 50 kg of attapulgite ore, add 19.5 kg of ethanol / methanol containing 1.25 kg of 1-ethyl-3-methylimidazolium bromide ( v / v =1:1) in the solution, after mixing evenly, it is first processed by double rollers and pressed into tablets, and then transferred to a closed container for 24 hours, so that the ionic liquid and attapulgite can fully interact; then the mixture of attapulgite and ionic liquid is directly Disperse in 980kg of water, fully stir to form a suspension of about 5%, pass through a 400-mesh sieve, carry out high-pressure homogenization treatment at 5 MPa, and obtain the suspension hydraulic filtration treatment. The obtained filter cake has a power of 5 KW and a frequency of Under the action of 2450 Hz microwave, it was dried and pulverized to obtain off-white nano attapulgite. Its scanning electron microscope picture is shown in figure 2 c.

Embodiment 2

[0021] After crushing 50 kg of attapulgite ore, add 15 kg of ethanol / methanol containing 5 kg of 1,2-dimethyl-3-ethylimidazolium tetrafluoroborate ( v / v =1:1) solution, mixed evenly, processed by double rollers and pressed into tablets, then transferred to an airtight container and placed for 6 hours, so that the ionic liquid and attapulgite could fully interact; then the attapulgite and ionic liquid mixture was directly dispersed into 250 kg of water, fully stirred to form a 20% suspension, passed through a 400-mesh sieve, and subjected to high-pressure homogeneous treatment at 30 MPa, and the obtained suspension was hydraulically filtered, and the obtained filter cake had a power of 10 KW and a frequency of 2450 Under the action of Hz microwave, it is dried and pulverized to obtain off-white nano attapulgite. Its scanning electron microscope picture is shown in figure 2 c.

Embodiment 3

[0023] After crushing 50 kg of attapulgite ore, add 18 kg of ethanol / methanol containing 2 kg of 1,2-dimethyl-3-ethylimidazolium chloride ( v / v =1:1) solution, mixed evenly, processed by double rollers and pressed into tablets, then put in a closed container for 12 hours, so that the ionic liquid and attapulgite can fully interact; then directly disperse the attapulgite and ionic liquid mixture into 500 kg of water, fully stirred to form a 10% suspension, passed through a 400-mesh sieve, and subjected to high-pressure homogeneous treatment at 40 MPa, and the obtained suspension was hydraulically filtered, and the obtained filter cake had a power of 8 KW and a frequency of 2450 Under the action of Hz microwave, it is dried and pulverized to obtain off-white nano attapulgite. Its scanning electron microscope picture is the same as 2c.

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Abstract

The present invention discloses a method for preparing single crystal dispersed nanometer attapulgite through ion liquid synergetic high-pressure homogenizing treatment. The method comprises: carrying out breaking treatment on attapulgite crude ore, adding to the ethanol / methanol solution of an ion liquid, uniformly mixing, carrying out roller pressing treatment, transferring to a closed container, carrying out closed placing for 6-24 h so as to completely interact between the ion liquid and the attapulgite, directly dispersing the attapulgite and ion liquid mixture into water, completely stirring to form a suspension with a mass concentration of 5-20%, screening with a 400 mesh sieve, carrying out high-pressure homogenizing treatment, separating the obtained solid, drying, and crushing to obtain the nanometer attapulgite while recycling the liquid. According to the present invention, the method has advantages of simple production process, high efficiency and no waste liquid discharge, and the obtained product has advantages of excellent performance, high purity and stable quality, and can be used in a variety of fields such as polymer material reinforcement, thickening and suspending, functional carriers and the like.

Description

technical field [0001] The invention relates to a method for preparing single-crystal dispersed nano-attapulgite by ionic liquid coordinated high-pressure homogeneous treatment, and belongs to the technical field of nano-material preparation and non-metallic ore deep processing. Background technique [0002] Attapulgite clay resources are abundant in my country, but the utilization level and product added value are not high. The main reason is that the naturally formed attapulgite rod crystals gather in the form of rod crystal bundles. Attapulgite rod crystals are about 1-5 μm in length and 20-70 nm in diameter. They are natural one-dimensional nanomaterials. However, due to strong hydrogen bonds and electrostatic forces, natural attapulgite rod crystals are mostly bird's nest rod crystals. shape or woodpile-like aggregation. Over the years, traditional treatment methods such as high-speed stirring, ultrasonication, rollers, grinding and freezing have been used to dissociat...

Claims

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Application Information

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