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A kind of hollow spherical serpentine superfine powder and its preparation method

A technology of ultra-fine powder and hollow sphere, applied in the direction of magnesium silicate, silicate, etc., can solve the problems of high bulk density and difficulty in completely solving the stable dispersion of serpentine powder, so as to reduce the bulk density and surface Polarity, effect of improving powder dispersibility

Active Publication Date: 2016-03-23
中建材科创新技术研究院(山东)有限公司
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  • Abstract
  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

The synthesized lizardite micro-nano powder has serious agglomeration and high packing density, so it is still difficult to completely solve the problem of stable dispersion of serpentine powder in lubricating oil

Method used

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Examples

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Embodiment 1

[0033] A method for preparing a hollow spherical serpentine ultrafine powder, the preparation method of the hollow spherical serpentine ultrafine powder comprises the following steps,

[0034] Step 1: take by weighing 5.128g of Mg(NO 3 ) 2 ·6H 2 O, 1.163g of Ni(NO 3 ) 2 ·6H 2 O, 0.430g La(NO 3 ) 3 ·6H 2 The citric acid of 0,4.804g, puts into 100mL distilled water successively, fully stirs, obtains mixed solution, drips ammoniacal liquor in mixed solution, the concentration of described ammoniacal liquor is 25%, adjusts the pH value of mixed solution to 7, and then Monodisperse SiO was added to the mixed solution 2 Hollow microspheres 1.001g, the monodisperse SiO 2 The average particle size of the hollow microspheres is 400-500nm.

[0035] Step 2: Add monodisperse SiO 2 The mixed solution of the hollow microspheres is heated and stirred at 60-90° C. until the mixed solution turns into a high-viscosity gel.

[0036] Step 3: Put the high-viscosity gel in an oven and d...

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PUM

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Abstract

The invention relates to the field of serpentine and particularly relates to hollow spherical type serpentine superfine powder and a preparation method thereof. The preparation method comprises the following steps: respectively weighing A mole of Mg<2+> magnesium salt, B mole of Ni<2+> nickel salt, C mole of La<3+> and D mole of citric acid, adding into water, evenly mixing to form a mixed solution, regulating pH value to be 5-7, and adding E mole of monodisperse SiO2 hollow microspheres, wherein A is greater than 0, B is greater than 0, (A+B):C is equal to (12:1)-(59:1), (A+B+C):D is equal to (1:3)-(1:1), and (A+B+C):E is equal to (3:2)-(3:4); then heating and stirring at 60-90DEG C to obtain high-viscosity gel, placing in a drying oven, drying for a long time at 80-150DEG C to form xerogel, igniting the xerogel to form spontaneous combustion powder and dispersing the powder; then mixing the dispersed spontaneous combustion powder with a surfactant and water, placing in an autoclave, reacting for 24-72h at constant temperature, cooling after reaction is finished, filtering, drying and dispersing to obtain the hollow spherical type serpentine superfine powder. The preparation method of the hollow spherical type serpentine superfine powder is simple and easy in manufacturing process, and continuous large-scale industrial production can be realized.

Description

technical field [0001] The invention relates to the field of serpentine, in particular to a hollow spherical serpentine superfine powder and a preparation method thereof. Background technique [0002] Serpentine is a TO-type layered silicate mineral, which is a general term for a hydrous magnesium-rich silicate mineral, such as antigorite, lizardite, and chrysotile. Composed of "magnesite" octahedral sheets with [SiO 4 ] The hexagonal mesh of the tetrahedral sheet is combined at a ratio of 1:1 to form a structural unit layer, and the layers are connected by hydrogen bonds, and the (001) cleavage is complete. Ideal chemical formula: Mg 6 Si 4 o 10 (OH) 8 , in the native state, the octahedral position Mg 2+ Will be partially replaced by Fe, Ni, Al, tetrahedral Si will be replaced by Al, Fe, density 2.57g / cm 3 . Serpentine has a positive charge on its surface. [0003] Regarding the synthesis of serpentine ultrafine powders, it mainly focuses on the preparation of chri...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B33/22
Inventor 李桂金赵平韩琳白志民
Owner 中建材科创新技术研究院(山东)有限公司
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