A kind of ultra-white composite sericite and preparation method thereof

A technology of sericite and sericite powder, applied in chemical instruments and methods, fibrous fillers, dyeing physical treatment, etc., to achieve bright and soft luster, good touch, and stable chemical properties.

Active Publication Date: 2021-05-25
四川赛和新材料科技有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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  • A kind of ultra-white composite sericite and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0056] (1) Take 100g of gray sericite powder with a dry weight of 1-15 μm in particle size, put it into a 2L reaction kettle, add 1200 milliliters of deionized water, and stir to make it uniformly dispersed into a suspension;

[0057] (2) Heat the suspension in a constant temperature water bath and raise the temperature to 70°C. Adjust the pH of the suspension to 2.0 with hydrochloric acid solution, and add TiCl with a concentration of 2 mol / L 4 Solution 110ml (corresponding to TiO 2 With respect to the specific gravity of base material gray sericite powder (15%), the feeding can be stopped, and the pH value can be kept constant with liquid caustic soda solution. Stir at constant temperature for 30 minutes after stopping feeding;

[0058] (3) Keep the above temperature constant, adjust the pH of the suspension to 11 with liquid caustic soda solution, and add dropwise MgCl with a mass fraction of 15% in the solution 2 ·6H 2 O solution 840.8ml (corresponding MgO is 20% with ...

Embodiment 2

[0065] (1) Take 100g of gray sericite powder with a dry weight of 1-15 μm in particle size, put it into a 2L reaction kettle, add 1200 milliliters of deionized water, and stir to make it uniformly dispersed into a suspension;

[0066] (2) Heat the suspension in a constant temperature water bath and raise the temperature to 70°C. Adjust the pH of the suspension to 2.0 with hydrochloric acid solution, and add TiCl with a concentration of 2 mol / L 4 Solution 156.3ml (corresponding TiO 2 With respect to the proportion of base material gray sericite powder (20%), the feeding can be stopped, and the pH value can be kept constant with liquid caustic soda solution. Stir at constant temperature for 30 minutes after stopping feeding;

[0067] (3) Keep the above temperature constant, adjust the pH of the suspension to 11 with liquid caustic soda solution, and add dropwise MgCl with a mass fraction of 15% in the solution 2 ·6H 2 O solution 1120.9ml (corresponding MgO is 25% with respec...

Embodiment 3

[0074] (1) Take by weighing 100 g of gram dry weight particle diameter and be 1-15 μ m gray sericite powder, drop into a volume and be in the reactor of 2 L, add 1200 milliliters of deionized water, stir to make it evenly disperse into suspension;

[0075] (2) Heat the suspension in a constant temperature water bath and raise the temperature to 70°C. Adjust the pH of the suspension to 2.0 with hydrochloric acid solution, and add TiCl with a concentration of 2 mol / L 4 Solution 156.3ml (corresponding TiO 2 With respect to the proportion of base material gray sericite powder (20%), the feeding can be stopped, and the pH value can be kept constant with liquid caustic soda solution. Stir at constant temperature for 30 minutes after stopping feeding;

[0076] (3) Keep the above temperature constant, adjust the pH of the suspension to 11 with liquid caustic soda solution, and add dropwise MgSO with a mass fraction of 15% in the solution 4 ·7H 2 O solution 1747.5ml (corresponding ...

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Abstract

Provided is an ultra-white composite sericite product, which includes sericite as a base material or core, and a titanium dioxide layer, a magnesium oxide layer and a silicon dioxide layer coated sequentially on the surface of the sericite. Also provided is a method of preparing the ultra-white composite sericite product from gray sericite with low whiteness.

Description

technical field [0001] The invention relates to a method for preparing ultra-white composite sericite from natural sericite with low whiteness (such as gray sericite) and a preparation method thereof, belonging to the field of new inorganic non-metallic materials. Background technique [0002] Sericite is a kind of potassium aluminum silicate mineral produced in layer or sheet form. It is a subspecies of muscovite ore. It is muscovite produced in fine particles. It has all the physical and chemical properties of muscovite : Excellent insulation, good chemical stability (insoluble in acid and alkali at room temperature), high temperature resistance (dehydration at above 800 °C, becoming opaque), large diameter-thickness ratio, smooth surface, delicate and smooth hand feeling Soft, with a bright silky luster, the particle size of the monomer is between 2-10um, and it is in the shape of fine scales. It has good dispersibility, good covering rate, moderate particle size, and ha...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09C1/30C09C3/06C09C3/04
CPCC09C1/3054C09C1/309C09C3/006C09C3/043C09C3/063
Inventor 张宏张斌裸伍拉哈
Owner 四川赛和新材料科技有限责任公司
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