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A modification activation process for attapulgite

A technology of attapulgite and attapulgite, applied in inorganic chemistry, silicon compounds, chemical instruments and methods, etc., can solve the problems of insufficient viscosity, affecting the performance and performance of attapulgite, and incomplete modification, so as to reduce production cost, improve environmental efficiency, and improve the effect of purity

Inactive Publication Date: 2017-04-05
明光市龙腾矿物有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Chinese patent discloses a variety of structural materials with attapulgite as coating, etc., but in the prior art, often due to
[0004] The modification operation of attapulgite has reasons such as unscientific purification and incomplete modification, which affect the performance and operation of attapulgite.
[0005] Use, the viscosity is not enough, and it is easy to cause disintegration when made into a coating or other structural materials

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] An attapulgite modification and activation process includes the following steps:

[0019] (1) Crush the attapulgite soil into 15 meshes, add the pulverized attapulgite soil to water, the mass ratio of attapulgite soil to water is 1:15, stir evenly, after soaking for 18 hours, centrifuge for 25min, centrifuge Rotation speed is 1600r / min; after centrifugation, filter, dry, and reserve;

[0020] (2) Add the attapulgite treated in the above step 1) to the 5% phosphoric acid solution, and stir and heat it at a stirring speed of 150r / min and a heating temperature of 85°C;

[0021] (3) Filter, dry and crush the attapulgite treated in step 2) to obtain modified attapulgite; raise the modified attapulgite from room temperature to 260°C and pass it through inert gas Nitrogen makes the water vapor contact with the attapulgite to react; after the reaction, the temperature starts to drop, and the addition of water vapor is stopped. After the temperature drops to room temperature, the atta...

Embodiment 2

[0023] (1) Crush the attapulgite soil into 10 meshes, add the crushed attapulgite soil to the water, the mass ratio of the attapulgite soil to water is 1:14, stir it evenly, soak for 20 hours, centrifuge for 20 minutes, centrifuge The rotating speed is 1700r / min; after centrifugation, filter, dry, and reserve;

[0024] (2) Add the attapulgite treated in the above step 1) to the 5% phosphoric acid solution, and stir and heat the mixture at a stirring speed of 220r / min and a heating temperature of 85°C;

[0025] (3) Filter, dry and crush the attapulgite treated in step 2) to obtain modified attapulgite; raise the modified attapulgite from room temperature to 280°C and pass it through inert gas Nitrogen makes the water vapor contact with the attapulgite to react; after the reaction, the temperature starts to drop, and the addition of water vapor is stopped. After the temperature drops to room temperature, the attapulgite is taken out, washed and dried.

Embodiment 3

[0027] (1) The attapulgite soil is crushed into 9 meshes, and the crushed attapulgite soil is added to the water. The mass ratio of the attapulgite soil to water is 1:13. Stir it evenly. After soaking for 16 hours, centrifuge for 18 minutes, centrifuge Rotation speed is 1600r / min; after centrifugation, filter, dry, and reserve;

[0028] (2). Add the attapulgite treated in the above step 1) to the 5% phosphoric acid solution, stir and heat, the stirring speed is 180r / min, and the heating temperature is 75°C;

[0029] (3) Filter, dry and crush the attapulgite treated in step 2) to obtain modified attapulgite; raise the modified attapulgite from room temperature to 265°C, and pass it through inert gas Nitrogen makes the water vapor contact and react with the attapulgite; after the reaction, the temperature starts to drop and the addition of water vapor is stopped. After the temperature drops to room temperature, the attapulgite is taken out, washed and dried.

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Abstract

A modification activation process for attapulgite is disclosed. The process includes steps of crushing attapulgite, then adding the crushed attapulgite into water, after the attapulgite is fully stirred and soaked, performing centrifugation treatment, filtration and drying, and keeping the obtained product for later use; adding the obtained product into a phosphoric acid solution, and stirring and heating the mixture; preparing modified attapulgite; heating the modified attapulgite, and allowing vapour to be in contact and reacted with the attapulgite through an inert gas that is nitrogen; and cooling the product after the reaction is finished, stopping feeding of the vapour, taking the attapulgite out after the temperature is lowered to room temperature, washing the attapulgite with water and drying the attapulgite. The high-temperature vapour is adopted to activate the attapulgite in the process. No acid washing waste water is discharged in the treatment process, thus increasing the environment protection efficiency of the production process and reducing the production cost.

Description

Technical field [0001] The invention relates to a modified activation process of attapulgite, belonging to the technical field of material preparation. Background technique [0002] Attapulgite, also known as palygorskite or palygorskite, is a kind of water-containing magnesium-rich silicate clay mineral with chain layered structure. Its structure is a 2:1 type clay mineral. In each 2:1 unit structure layer, the corners of the tetrahedral wafer are reversed at a certain distance, forming a layer chain. A channel parallel to the chain is formed between the tetrahedral strips, and the cross section of the channel is about 3.7*6.3A°. [0003] The Chinese patent discloses a variety of structural materials using attapulgite as a coating, but in the prior art, it is often due to [0004] The modification operation of attapulgite has unscientific purification and incomplete modification, which affect the performance and work of attapulgite. [0005] If the viscosity is not enough, it is e...

Claims

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Application Information

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IPC IPC(8): C01B33/40
Inventor 王小明
Owner 明光市龙腾矿物有限公司
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