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Purification technical method for attapulgite clay

A technology of attapulgite clay and process methods, applied in chemical instruments and methods, inorganic chemistry, non-metallic elements, etc., can solve problems such as dead condensation, complicated process, and influence on purification effect, and achieve easy operation, high purity, and simple process Effect

Active Publication Date: 2013-01-16
甘肃融万科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these methods are more complex, and the attapulgite clay is difficult to fully suspend in the aqueous solution, and the surface is prone to polymerization reaction to form dead condensation, which affects the purification effect

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] A. Weigh 100g of attapulgite clay into 1000ml of distilled water, stir with a cross-knife stirrer at 1500 rpm for 3 hours, and activate treatment with 50ml of hydrochloric acid with a solubility of 1mol / L in a water bath at 80°C for 3 hours; activation Add 10ml of OP-10 active agent to the treated suspension, add NaOH solution to adjust the pH of the suspension to 8, use a cross knife stirrer at 1500 rpm for 4 hours, stand still for 10 hours, separate the attapulgite Clay suspension and sedimentation impurity layer to filter out impurities;

[0019] B. Add 5g of ethylenediaminetetraacetic acid disodium salt to the separated attapulgite clay suspension, wait for it to react for 10 minutes, and centrifuge the reaction solution 3 times at 3500r / min in a centrifuge. Recover the solids every 5 minutes;

[0020] C. Add 15g Na to the recovered solid 2 CO 3 , Add distilled water to 1000mL to prepare a suspension, heat the prepared suspension to 100°C for 3 hours, and then centrifug...

Embodiment 2

[0023] A. Weigh 50g of attapulgite clay into 800ml of distilled water, stir with a cross-knife stirrer at 1500 rpm for 4 hours, and activate it with 50ml of hydrochloric acid with a solubility of 1mol / L in a water bath at 80°C for 1 hour; activation Add 5ml of Tween-20 active agent to the treated suspension, add NaOH solution, adjust the pH of the suspension to 6, use a cross knife stirrer at 1500 rpm for 2 hours, stand still for 10 hours, and separate Attapulgite clay suspension and sedimentation impurity layer to filter out impurities;

[0024] B. Add 3g of ethylenediaminetetraacetic acid disodium salt to the separated attapulgite clay suspension, wait for it to react for 10 minutes, centrifuge the reaction solution in a centrifuge at 3500r / min for 5 minutes, centrifuge Treat 3 times to recover solids;

[0025] C. Add 10g Na to the recovered solid 2 CO 3 , Add distilled water to 1000mL to prepare a suspension, heat the prepared suspension to 70°C for 3 hours, then centrifuge the...

Embodiment 3

[0028] A. Weigh 80g of attapulgite clay into 1000ml of distilled water, stir with a cross-knife stirrer at 1500 rpm for 4 hours, and activate treatment with 80ml of hydrochloric acid with a solubility of 1mol / L in a water bath at 100°C for 3 hours; activation Add 8ml of sorbitan fatty acid ester type activator (S80) type activator to the treated suspension, add NaOH solution to adjust the pH of the suspension to 7, and stir at 1500 rpm with a cross knife stirrer for 3 After 10 hours of standing still, separate the attapulgite clay suspension and the sedimentary impurity layer to filter out impurities;

[0029] B. Add 3g of ethylenediaminetetraacetic acid disodium salt to the separated attapulgite clay suspension, wait for it to react for 10 minutes, and centrifuge the reaction solution in a centrifuge at 3500r / min for 3 times. Recover the solids every 5 minutes;

[0030] C. Add 15g Na to the recovered solid 2 CO 3 , Then add distilled water to 1000mL to prepare a suspension, heat ...

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PUM

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Abstract

The invention relates to a purification technical method for attapulgite clay. The purification technical method comprises the following steps of: putting an active agent serving as a dispersion agent between the crystal faces of the attapulgite clay, so that the bonding force between crystal layers is weakened, and crystal stacked layers are released; applying proper mechanical action to fully separate attapulgite clay from impurities such as sand, and achieving a preliminary purification effect; then separating impurities such as dolomite and quartz in attapulgite clay powder by taking inorganic salt as a purification agent through adsorption and electrochemical action; and complexing inorganic salt and multivalent ions such as ferrum, copper, calcium and magnesium to form a stable water-soluble complex, wherein under the complexing action, color change caused by metal is prevented, and the purpose of improving the color of the attapulgite clay powder is fulfilled; and therefore, the attapulgite clay with the purity of over 99.5 percent is obtained.

Description

technical field [0001] The invention relates to a purification process of attapulgite clay. The method can improve the purity of powder without affecting the original properties of attapulgite clay, and belongs to the technical field of inorganic materials. Background technique [0002] Attapulgite clay is a clay mineral mainly composed of hydrous magnesium-rich silicate (attapulgite) with a layered chain transition structure. High-viscosity attapulgite clay is characterized by its excellent thickening, suspension, and shake-thaw properties. It is widely used in the paint and paint industry in developed countries, and has very high use value, but because attapulgite clay usually coexists with minerals such as dolomite, calcite, quartz, and opal, the purity of attapulgite clay powder is reduced. Directly affect its use effect and scope of use. [0003] At present, there are also relevant researches on the process of purifying attapulgite clay powder. US Patent No: 6446601 u...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B33/40
Inventor 姚义俊刘斌苏静
Owner 甘肃融万科技有限公司
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