High pure attapulgite clay and preparation method

A technology of attapulgite and attapulgite, which is applied in the field of high-purity attapulgite and its preparation, can solve problems affecting the use effect and use range, and achieve the effect of simple and easy purification process, easy-to-obtain raw materials, and high purity

Inactive Publication Date: 2005-01-12
HUAIYIN INSTITUTE OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, attapulgite usually coexists with dolomite, calcite, quartz, opal, etc., which directly affects its use effect and scope
[0003] The U.S. is the first country to discover attapulgite, and it is also the main producer of attapulgite and the country with the most extensive research and application. Its invention patent U.S.Pat.No: 6446601 and 6130179 utilize dispersant sodium polyacrylate (molecular weight 4000~ 5000) effectively disperse and purify attapulgite, and there is no report in this area in China

Method used

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  • High pure attapulgite clay and preparation method
  • High pure attapulgite clay and preparation method
  • High pure attapulgite clay and preparation method

Examples

Experimental program
Comparison scheme
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example 1

[0018] Example 1: gray-green attapulgite ore containing 17.2% of quartz and 83.8% of attapulgite, primary crushed to 200 mesh, added to 40°C, 1% homogeneous aqueous solution containing sodium polyphosphate at a ratio of 1:20, mechanically stirred for 20 minutes and mixed with After alternating 10min ultrasonic vibrations for 3 times each, stand still for 30min to produce an obvious off-white suspension and black precipitate layering, take out or pour out the upper suspension, and carry out vacuum spray drying at 80-100°C to obtain attapulgite with a content of 99.5% attapulgite particles with a whiteness of 87.

[0019] The x-diffraction and scanning electron microscope detection of attapulgite before and after purification are as follows: figure 1 with figure 2 shown.

example 2

[0020] Example 2: The gray-white attapulgite ore containing dolomite and 47.5% of quartz is pre-filtered to 300 mesh, and added to a homogeneous aqueous solution containing 2.5% sodium silicate at 60°C at a ratio of 1:15, and mechanically stirred for 30 minutes and ultrasonically oscillated for 20 minutes. After 2 times, let it stand for 60 minutes, pour out the upper suspension, and carry out centrifugation to obtain attapulgite crystal slurry, and then vacuum freeze-dry at 40°C to obtain attapulgite with a content of attapulgite of 90% and a whiteness of 91. particles.

[0021] The x-diffraction and scanning electron microscope detection of attapulgite before and after purification are as follows: image 3 with Figure 4 shown.

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Abstract

The method is preparing high-purity concave soil by physicochemical process to do edulcorating and purifying to natural concave-convex rod clay mine. It is suitable for concave clay mine containing dolomite, quartz sand, calcite or opal. A kind of chemical regent is used as purifying dispersing agent to prepare water solution with proper density which is added concave clay will be processed by machinical forcing and in proper tem., after being fully dispersed and reacted, concave soil with good crystalline form, white color and more than 99 percent of purity is produced by separating and drying.

Description

Technical field [0001] The invention relates to a high-purity attapulgite and a preparation method thereof, belonging to the field of deep processing of non-metallic ores. Background technique [0002] Attapulgite clay, referred to as attapulgite, is a magnesium-rich silicate with a molecular formula of [Mg 5 S i8 o 2o ](OH) 2 (OH 2 ) 4 .4H 2 O, the crystal structure belongs to the 2:1 layer chain clay mineral, which endows it with high use value because of its special structure and properties. However, attapulgite usually coexists with dolomite, calcite, quartz, opal, etc., which directly affects its use effect and scope. [0003] The U.S. is the first country to discover attapulgite, and it is also the main producer of attapulgite and the country with the most extensive research and application. Its invention patent U.S.Pat.No: 6446601 and 6130179 utilize dispersant sodium polyacrylate (molecular weight 4000~ 5000) to effectively disperse and purify attapulgite, bu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B33/04
Inventor 金叶玲钱运华姚虎卿马正飞
Owner HUAIYIN INSTITUTE OF TECHNOLOGY
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