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Method for purifying attapulgite

A technology of attapulgite and attapulgite, applied in chemical instruments and methods, inorganic chemistry, silicon compounds, etc., can solve the problem that ultrasonic devices cannot be widely used in large-scale production, purified attapulgite cannot be effectively utilized, and the specific surface area has not been improved. problems, to achieve the effect of abundant reserves, low cost and optimized process flow

Active Publication Date: 2019-05-28
北京中蓝港湾科技有限公司 +1
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

However, the shortcomings of these methods are: under industrial production conditions, ultrasonic devices cannot be widely used in large-scale production. Although the purity of the finally formed purified attapulgite material is improved, its specific surface area has not been improved, and the purified attapulgite cannot be effectively utilized.
Therefore, how to improve the performance of attapulgite under the premise of purifying attapulgite, increase its specific surface area, and make it industrially utilized is still a challenge.

Method used

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  • Method for purifying attapulgite
  • Method for purifying attapulgite
  • Method for purifying attapulgite

Examples

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Embodiment 1

[0027] A. Primary purification of attapulgite:

[0028] The attapulgite clay raw ore is ball milled and vibrating screened to obtain a powder with a particle size of about 5um. Weigh 10g of the original soil powder for later use. Weigh 0.3g of sodium hexametaphosphate and add it to 1L solution to prepare a mass fraction of 3 % dispersant solution, and then pour it into the colloid mill and mix it evenly with the original soil powder, so that the attapulgite original soil is fully dispersed in the dispersant solution. The mixed solution was centrifuged and washed once for one hour and taken out for later use.

[0029] B. Secondary purification of attapulgite:

[0030] The attapulgite treated with the dispersant in step A is added to 200ml of 1mol / L hydrochloric acid solution, after fully mixing in the colloid mill for 1 hour, then the acidified attapulgite is centrifuged and added to 200ml of 1mol / L ammonia solution, Stir in a magnetic stirrer for 30 minutes and then centrifu...

Embodiment 2

[0035] Weigh 0.8g of sodium pyrophosphate and add it to 1L solution to prepare a dispersant solution with a mass fraction of 8%, then pour it into a colloid mill and mix it evenly with the original soil powder to fully disperse the attapulgite original soil in the dispersant solution.

[0036] Others are the same as embodiment 1.

[0037] Specific data: SEM photo see Figure 5 , X-ray diffraction pattern see Figure 6 .

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Abstract

The invention provides a method for purifying attapulgite, and belongs to the technical field of attapulgite purification. A technological process of purification attapulgite clay with high specific surface area includes the following steps that attapulgite virgin clay after ball-milling screening is added into a dispersant solution and then subjected to centrifugal washing, a hydrochloric acid solution is added, the mixture is mixed thoroughly for 1 hour in a colloid mill and then subjected to centrifugal separation, an ammonium hydroxide solution is added, the mixture is stirred in a magnetic stirrer and then centrifuged, deionized water is added, the mixture is mixed well and then centrifuged, a supernatant is taken for spray drying, and the purification attapulgite clay with the specific surface area reaching up to 151.6 m<2> / g can be obtained. The technological process has the advantages of easy operation, high safety, low price of raw materials and abundant reserves, is easily suitable for industrial expandable production, and has great application value.

Description

technical field [0001] The invention relates to a method for preparing purified attapulgite with high specific surface area, and belongs to the technical field of attapulgite purification. Background technique [0002] Attapulgite (hereinafter referred to as attapulgite) refers to a clay mineral with attapulgite as the main component, often containing impurity minerals such as montmorillonite, kaolin, sepiolite, hydromica, quartz, opal and carbonate . Attapulgite is a hydrous magnesium aluminum silicate crystal with a layered chain structure, rod-like, fibrous, 500-5000nm long and 50-150nm wide. There are a large number of zeolite channels inside the crystal, and the surface is concave and convex, full of grooves, so that it has a large specific surface area and strong adsorption force. Most of the cations, water molecules and organic molecules of a certain size can be directly adsorbed into the channels. , and the electrochemical performance is stable, and it is not easy ...

Claims

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Application Information

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IPC IPC(8): C01B33/40
Inventor 孙文孙晓明李佳伟武川罗亮
Owner 北京中蓝港湾科技有限公司
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