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Attapulgite purifying method

A purification method and technology of attapulgite, applied in the field of attapulgite purification, can solve the problems of poor purification effect and complicated process, and achieve the effect of improving purity, simple process and easy operation

Active Publication Date: 2019-04-23
NANJING UNIV OF INFORMATION SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Purpose of the invention: the present invention provides a method for purifying attapulgite, which solves the problems of complex process and poor purification effect in the existing purification technology

Method used

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Experimental program
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Effect test

Embodiment 1

[0029] The purification method of attapulgite includes the following steps:

[0030] (1) Primary selection of powder: crush and grind the original attapulgite mineral powder, pass through a 120-mesh sieve, and send it into a high-temperature horse boiling furnace for roasting and activation at 550°C for 1 hour to obtain the original attapulgite. The mass ratio of the original attapulgite to water is 1:0.8 Add water, add 2% sodium hexametaphosphate and 2% polyacrylic acid of the original attapulgite mass to a ball mill and grind for 2h at a low speed of 100 rpm. Take out the attapulgite slurry and let it stand for 24h. Divide into the upper clarified layer, the middle attapulgite suspension layer and the lower sedimentation layer, and the middle attapulgite suspension layer is taken by a pipette.

[0031] (2) Acidification treatment: add the intermediate attapulgite suspension layer to the mixed acid solution with a volume ratio of 5%, and add edetic acid to the attapulgite slurry a...

Embodiment 2

[0036] The purification method of attapulgite includes the following steps:

[0037] (1) Primary selection of powder: crush and grind the original attapulgite mineral powder, pass through a 120-mesh sieve, and send it into a high-temperature horse boiling furnace for roasting and activation at 650°C for 1 hour to obtain the original attapulgite. The mass ratio of the original attapulgite to water is 1:1 Add water at a ratio of 5%, add 5% sodium hexametaphosphate and 5% polyacrylic acid of the original attapulgite mass into a ball mill for 4h grinding at a low speed of 100 rpm, and remove the attapulgite slurry. After standing for 24 hours, the attapulgite slurry is divided into the upper clarified layer, the middle attapulgite suspension layer and the lower sedimentation layer, and the middle attapulgite suspension layer is taken by a pipette.

[0038] (2) Acidizing treatment: add the intermediate attapulgite suspension layer to the mixed acid solution with a volume ratio of 10%, a...

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Abstract

The invention discloses an attapulgite purifying method. The attapulgite purifying method comprises the steps of (1) primary powder selection, (2) acidizing treatment, (3) alkalizing treatment, (4) complexing treatment and (5) bleaching to obtain white attapulgite. The attapulgite purifying method has the advantages of being simple in process, easy to operate and the like, and meanwhile, under thepremise of no affecting original properties of attapulgite clay, improves the powder purity up to 98.5% and the whiteness up to 95%, thereby being of high significance to application and developmentattapulgite powder.

Description

Technical field [0001] The invention relates to the technical field of inorganic materials, in particular to a purification method of attapulgite. Background technique [0002] Attapulgite clay (attapulgite) is a kind of clay mineral mainly containing water-containing magnesium-rich silicate (attapulgite) with a layered chain transition structure. High-viscosity attapulgite is due to its excellent thickening and suspending properties. , Suspension is widely used in the coatings and paint industries of developed countries, and has very high use value. However, because the attapulgite is usually symbiotic with dolomite, calcite, quartz, opal and other minerals, the purity of the attapulgite powder is reduced. , Directly affect its use effect and scope of use. [0003] At present, there are related researches on the purification process of attapulgite powder. US Patent No: 6,446,601 uses polyacrylic acid sodium to disperse and purify attapulgite powder in solution to improve the puri...

Claims

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Application Information

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IPC IPC(8): C01B33/40
CPCC01B33/40C01P2004/03C01P2002/72C01P2006/80
Inventor 姚义俊齐贵君刘斌王卫谭敦峰胡义秋
Owner NANJING UNIV OF INFORMATION SCI & TECH