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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 range of use, and achieve the effect of simple and easy purification process, easy-to-obtain raw materials, and high purity

Inactive Publication Date: 2006-04-05
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: 6444601 and 6130179 utilize dispersant sodium polyacrylate (molecular weight 4000~ 5000) effectively disperse and purify attapulgite, and there is no report in this regard in China

Method used

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

Examples

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Effect test

example 1

[0017] Example 1: the clay ore of gray-green natural attapulgite containing 17.2% of quartz and 83.8% of attapulgite clay, firstly crushed to 25 microns (200 mesh), was added at 40°C at 1:20, containing 1% sodium polyphosphate In the homogeneous aqueous solution, after 20 minutes of mechanical stirring and 10 minutes of ultrasonic vibration alternately for 3 times, let it stand for 30 minutes to produce obvious off-white suspension and black precipitate layering, pump out or pour out the upper suspension, and vacuum at 80 ~ 100 ° C Spray drying to obtain attapulgite clay particles with a clay content of 99.5% and a whiteness of 87 for the attapulgite.

[0018] The x-diffraction and scanning electron microscope detection of the attapulgite clay before and after purification are as follows: figure 1 and Figure 2 Show.

example 2

[0019] Example 2: The clay ore of gray-white natural attapulgite containing dolomite and quartz 47.5% is first crushed to 48 microns (300 orders), and added in a homogeneous aqueous solution containing 2.5% sodium silicate at 60° C. by 1:15, mechanically for 30 minutes Stirring and 20min ultrasonic oscillation alternate twice each, then stand still for 60min, pour out the upper suspension, and carry out centrifugation to obtain the clay crystal slurry of the attapulgite, and then vacuum freeze-dry at 40°C to obtain the clay content of the attapulgite 90% attapulgite clay particles with a whiteness of 91.

[0020] The x-diffraction and scanning electron microscope detection of the attapulgite clay before and after purification are as follows: image 3 and 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 Si 8 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: 6444601 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 Patents(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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