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Method for preparing white pearlescent pigment by sericite

A pearlescent pigment, sericite technology, applied in inorganic pigment processing, chemical instruments and methods, fibrous fillers, etc., can solve the problems of complex production process, easy influence on product color, increased cost, etc., and achieve the effect of simple preparation method

Inactive Publication Date: 2009-06-17
CHINA UNIV OF GEOSCIENCES (WUHAN)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The natural color of sericite is silver-gray, and its color is extremely difficult to change at the same time. Therefore, there are the following defects in the application of sericite: 1. When it is used as a raw material or filler for a certain product (especially a product that is white in color) , can easily affect the color of the product, complicate the production process of the product, and increase the cost of the product; 2. Limit the application and dosage of sericite in some products

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] The present invention prepares the method embodiment 1 of white pearlescent pigment with sericite, and its steps are:

[0022] (1) After the sericite ore is roughly crushed, mashed, and graded and purified, it is ultra-fine in a stirring mill to about 10 μm by wet method, and then dehydrated, dried, and dispersed for subsequent use;

[0023] (2) Activation; the specific activation method is: take 10g of the above-mentioned ultrafine sericite, pour it into a three-necked flask, add 200ml hydrochloric acid solution (concentration is 1mol / L) simultaneously, place it in a 60°C water bath and stir for 40 minutes, filter, Wash until neutral; then add 200ml of phosphoric acid (concentration 5%), and place in a 60°C water bath to stir for 30 minutes, filter, wash until neutral, and set aside;

[0024] (3) In a three-neck flask, add 200ml of distilled water, place in a water bath at 80°C and stir, make a 5% suspension of activated sericite, and adjust the pH value to 2.0 with 1m...

Embodiment 2

[0026] The present invention prepares the method embodiment 2 of white pearlescent pigment with sericite, and its steps are:

[0027] (1) After the sericite ore is roughly crushed, mashed, and graded and purified, it is ultra-fine in a stirring mill to about 10 μm by wet method, and then dehydrated, dried, and dispersed for subsequent use;

[0028] (2) Activation; the specific activation method is: take 10g of the above-mentioned ultrafine sericite, pour it into a three-necked flask, add 200ml hydrochloric acid solution (concentration is 1mol / L) simultaneously, place it in a 60°C water bath and stir for 60 minutes, filter, Wash until neutral; then add 200ml of phosphoric acid (concentration 5%), and place in a 60°C water bath to stir for 30 minutes, filter, wash until neutral, and set aside;

[0029] (3) In a three-neck flask, add 200ml of distilled water, place in a water bath at 80°C and stir, make a 5% suspension of activated sericite, and adjust the pH value to 2.0 with 1m...

Embodiment 3

[0031] The present invention prepares the method embodiment 3 of white pearlescent pigment with sericite, and its steps are:

[0032] (1) After the sericite ore is roughly crushed, mashed, and graded and purified, it is ultra-fine in a stirring mill to about 10 μm by wet method, and then dehydrated, dried, and dispersed for subsequent use;

[0033] (2) Activation; the specific activation method is: take 10g of the above-mentioned ultrafine sericite, pour it into a three-necked flask, add 250ml hydrochloric acid solution (concentration is 1mol / L) simultaneously, place it in a 60°C water bath and stir for 40 minutes, filter, Wash until neutral; then add 250ml of phosphoric acid (concentration 5%), and place in a 60°C water bath to stir for 30 minutes, filter, wash until neutral, and set aside;

[0034] (3) In a three-necked flask, add 200ml of distilled water, stir in a water bath at 80°C, make a 5% suspension of activated sericite, and adjust the pH value to 1.5 with 1mol / L hyd...

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PUM

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Abstract

The invention relates to a method for preparation of white nacreous pigments with sericite mica, which consists of : (1) jevigating the sericite mica to 5-20 mum; (2) activating; (3) preparing 3-20 % suspending liquid with the activated sericite mica, adjusting PH value to 1.5-2.5 with the acid solution, dripping 10-15 % titanic chloride solution into water-bath of 60-80 DEG C, simultaneously dripping alkaline solution to keep the stabilization of the PH value; stopping dripping the liquid when the express flash appears in the solution, then filtering the solution and washing with water to neutral, drying to powders; (4) preserving the heat for 0.5-2 hours at 850-900 DEG C, after the refrigeratory, grinding to obtain the white nacreous pigments. The products can be used in industrial domain such as paint, paint, plastic, rubber, paper making and cosmetics.

Description

technical field [0001] The invention relates to sericite, especially a method for preparing products from sericite. Background technique [0002] Sericite belongs to layered silicate minerals, which are widely distributed in my country. It is generally a product of regional metamorphism and low-temperature hydrothermal alteration. Its natural color is silver-gray, with a strong silky luster. Transparent to translucent, the natural particle size is uniform and fine, and its standard chemical structure is KAl 2 [AlSi 3 o 10 ](OH) 2 . Sericite belongs to the monoclinic crystal system, and its optical axis angle q=15-30° is smaller than that of muscovite (q=30-50°). During the mixing process of sericite products, the force of drafting and Due to the pressure, it will be arranged in parallel orientation, and the laminated mica can be rotated and randomly dislocated, which will make the optical axis planes oblique or orthogonal to each other, resulting in interference color a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09C3/06C09C3/04
Inventor 严春杰韩利雄陈洁渝王宗霞
Owner CHINA UNIV OF GEOSCIENCES (WUHAN)