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Method for activating attapulgite

A technology of attapulgite and activation method, applied in chemical instruments and methods, separation methods, other chemical processes, etc., can solve the problems of polluting the environment, corroding equipment, uneconomical, etc., to improve surface properties, improve mechanical strength, improve The effect of production efficiency

Active Publication Date: 2014-07-02
SUZHOU YUXI NEW MATERIAL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] However, it is not economical to use acid solution to activate the attapulgite in actual production, and it also requires an additional washing process, and the waste water produced is acidic, which not only corrodes the equipment, but also pollutes the environment

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Take by weighing 100 grams of attapulgite, grind and pulverize, sieve to below 2 mm, measure 2 liters of deionized water, mix attapulgite with deionized water, stir evenly, let stand, filter, and dry to obtain the initial attapulgite. finished product.

[0028] The prepared attapulgite was raised from room temperature to 250 °C, passed through N 2 Make the water vapor contact with the attapulgite; further increase the reaction temperature to 300°C, keep the temperature down for 2 hours, stop adding water vapor, and take out the attapulgite after the temperature drops to room temperature.

[0029] The water vapor is passed through the micropump, and the water is first passed through the vaporization section to form water vapor, and then the water vapor is activated and modified through the reaction section, which can be realized quantitatively and at a constant speed through the micropump. In this embodiment, the flow rate of the water vapor is 1 liter / Hour.

Embodiment 2

[0031] Take by weighing 100 grams of attapulgite, grind and pulverize, sieve to below 2 mm, measure 5 liters of deionized water, mix attapulgite with deionized water, stir evenly, let stand, filter, and dry to obtain the initial attapulgite. finished product.

[0032] The prepared attapulgite was raised from room temperature to 250 °C, passed through N 2 Make water vapor contact with attapulgite to react; after further raising the reaction temperature to 350°C, start to cool down after 1 hour of heat preservation reaction, and stop adding water vapor. After the temperature drops to room temperature, take out attapulgite.

[0033] In this embodiment, the flow rate of water vapor is 5 liters / hour.

Embodiment 3

[0035] Apply the activated attapulgite obtained in Example 1 to the preparation process of foam ceramic insulation materials: weigh 100 grams of activated attapulgite, 2 grams of aminovinylsilane coupling agent and 1.5 kilograms of water, Heat in a water bath to 50°C, ultrasonically disperse for 10 minutes to obtain a viscous liquid of attapulgite, then add 300 grams of green layer cerite powder, stir and disperse at high speed for 10 minutes to obtain a dispersed mixed slurry, and continue to add foam ceramics 2 kg of blanks and 20 grams of foaming agent are ball milled in a ball mill for 4 hours, and finally sintered at high temperature. The sintering furnace is first heated to 300°C, kept for 1 hour, and then heated to 800°C, kept for 1 hour, and the foam ceramic insulation material is obtained. .

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PUM

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Abstract

The invention discloses a method for activating attapulgite. The method specifically comprises the steps of (1) purifying the attapulgite, grinding and pulverizing the attapulgite, screening the attapulgite until the attapulgite with the particle size of being smaller than 2mm is retained, then mixing the attapulgite with deionized water, and performing stirring, stewing, filtering and drying; and (2) activating the attapulgite, heating the prepared attapulgite from room temperature to 250 DEG C, enabling water steam to be in contact with the attapulgite by taking inert gas N2 as carrier gas for reaction, further raising the temperature to 300-350 DEG C, preserving the heat for 1-2 hours, starting to cool the attapulgite, stopping feeding the water steam, and taking out the attapulgite after the attapulgite is cooled to the room temperature. The method has the advantages that (1) the attapulgite is activated through the water steam, and no pickling wastewater is emitted in the treatment process, so that the environment protection efficiency in a production process is improved; (2) due to the water steam activation treatment under proper temperature, the surface performance of the attapulgite can be improved, and the application field of the attapulgite can be further expanded.

Description

technical field [0001] The invention relates to an activation method of attapulgite, which belongs to the technical field of material preparation. Background technique [0002] Attapulgite is a layer chain structure of hydrous rich magnesium aluminum silicate clay mineral. Attapulgite is widely used in the fields of chemical industry, light industry, textile, building materials, environmental protection and pharmaceuticals because of its special fiber structure, excellent adsorption and decolorization properties. [0003] Under normal circumstances, attapulgite, as a powder material, is difficult to exist in the state of dispersed independent rod crystals, but forms a certain form of crystal aggregates. Therefore, in practical application, attapulgite must be purified and activated. [0004] In the prior art, thermal activation or acid activation process is often used, combined with mechanical stirring, ultrasonic stirring, muffle furnace and microwave heating methods to a...

Claims

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Application Information

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IPC IPC(8): B01J20/12B01J20/34B01J20/30
Inventor 张宇
Owner SUZHOU YUXI NEW MATERIAL TECH
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