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Preparation method of spherical antimonous oxide

A technology of antimony trioxide and spherical shape, which is applied in the field of preparation of spherical antimony trioxide, can solve the problems of material mechanical properties decline, failure to meet the use requirements, poor matrix compatibility, etc., and achieve improved compatibility and low oil absorption value , Improve the effect of sphericity

Active Publication Date: 2021-04-20
广东宇星阻燃新材股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, antimony trioxide used as a flame retardant is cubic or orthorhombic crystal antimony trioxide prepared by traditional methods. Generally, it is used as an additive powder flame retardant because of its small particle size, resulting in In the process of use, the compatibility with the matrix is ​​poor, which will easily cause the mechanical properties of the material to decline. When it is applied to the fields with high viscosity and fluidity requirements such as coatings and paints, it cannot meet the use requirements.

Method used

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  • Preparation method of spherical antimonous oxide
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  • Preparation method of spherical antimonous oxide

Examples

Experimental program
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Effect test

Embodiment 1

[0024] (1) Preparation of antimony trioxide seed crystals: Weigh an appropriate amount of cubic crystal (purity: 99.8%, D50=1.5 μm, D90=3 μm) and add it to distilled water, the proportion of antimony trioxide is 5%, And add 0.1% sodium hexametaphosphate, and then ultrasonically disperse for 30 minutes to form slurry A; then the slurry A is added to the horizontal sand mill, and the amount of zirconia beads in the horizontal sand mill is adjusted to make it account for the total 65% of the volume, adjust the feed motor speed, control the flow rate to be 34% of the volume of the sand mill, and obtain slurry B after being processed by a horizontal sand mill; filter and dry the slurry B to obtain standby di Antimony seeds, ensure that the particle size distribution is D50≤0.4μm, D90≤1.0μm.

[0025] (2) Prepare a device for preparing spherical antimony trioxide: prepare an oxygen blowing tube, and the oxygen blowing tube (see figure 1 ) comprises a hollow circular outer tube 1 wit...

Embodiment 2

[0028] (1) Preparation of antimony trioxide seed crystals: Weigh an appropriate amount of orthorhombic antimony trioxide (purity: 99.8%, D50=1.5 μm, D90=3 μm) and add it to distilled water. accounted for 15%, and added 0.5% triethylhexanoic acid, and then ultrasonically dispersed for 50 minutes to form slurry A; then the slurry A was added to the horizontal sand mill, and the zirconia beads in the horizontal sand mill were adjusted The amount makes it account for 70% of the total volume, adjust the feed motor speed, the control flow is 26% of the volume of the sand mill, and obtain the slurry B after being processed by the horizontal sand mill; the slurry B is filtered and dried, Obtain spare antimony trioxide seed crystals, and ensure that the particle size distribution thereof is D50≤0.3 μm and D90≤0.7 μm.

[0029] (2) Prepare a device for preparing spherical antimony trioxide: prepare an oxygen blowing tube, and the oxygen blowing tube (see figure 1 ) comprises a hollow ci...

Embodiment 3

[0032](1) Preparation of antimony trioxide seed crystals: Weigh an appropriate amount of antimony trioxide (purity: 99.8%, D50=3.5 μm, D90=6 μm) in the cubic crystal form and add it to distilled water. Ratio of 10%, and adding 0.2% triethylhexanoic acid, and then ultrasonically dispersed for 60 minutes to form slurry A; then the slurry A was added to the horizontal sand mill, and the zirconia beads in the horizontal sand mill were adjusted The amount makes it account for 85% of the total volume, adjust the feed motor speed, control the flow rate to be 14% of the sand mill volume, obtain the slurry B after being processed by the horizontal sand mill; the slurry B is filtered and dried, Obtain spare antimony trioxide seed crystals, and ensure that the particle size distribution thereof is D50≤0.3 μm and D90≤0.6 μm.

[0033] (2) Prepare a device for preparing spherical antimony trioxide: prepare an oxygen blowing tube, and the oxygen blowing tube (see figure 1 ) comprises a holl...

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Abstract

The invention discloses a preparation method of spherical antimonous oxide, wherein the preparation method comprises the steps: carrying out spheroidization treatment and refinement treatment on traditional cubic crystal form or orthorhombic crystal form antimonous oxide serving as a raw material by using a sand mill, taking as a seed crystal, and introducing the seed crystal into an antimonous oxide preparation system by using a specially designed oxygen blowing pipe to obtain the spherical antimonous oxide. The prepared spherical antimonous oxide is spherical in crystal form and smaller in oil absorption value, the compatibility of a flame retardant in a plastic material is remarkably improved, and the influence on the viscosity of coatings, oil paint and the like is quite small.

Description

technical field [0001] The invention relates to the technical field of synthesis and application of flame-retardant new materials, in particular to a preparation method of spherical antimony trioxide. Background technique [0002] Antimony trioxide (chemical formula: Sb2O3) is an inorganic compound. The natural product is called antimony, commonly known as antimony white. Because it has a good flame-retardant synergistic effect with halogen flame retardants, it is widely used in plastics, rubber, textiles, Chemical fiber, pigment, paint, electronics and other industries are currently one of the most widely used flame retardants in the world. At present, antimony trioxide used as a flame retardant is cubic or orthorhombic crystal antimony trioxide prepared by traditional methods. Generally, it is used as an additive powder flame retardant because of its small particle size, resulting in During use, the compatibility with the matrix is ​​poor, which will easily cause the mech...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G30/00
CPCY02E60/10
Inventor 罗宏波孔利权罗斯林沐钦刘敏
Owner 广东宇星阻燃新材股份有限公司
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