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Method for preparing antimonous oxide ultrafine powder

An antimony trioxide and ultra-fine powder technology, applied in chemical instruments and methods, inorganic chemistry, antimony compounds, etc., can solve the problems of difficult powder particle size control, large reaction area, low reaction temperature, etc., and achieve good and stable quality. , obvious economic benefits, the effect of simple processing technology

Active Publication Date: 2017-05-24
上海深化实业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, Sb produced by the traditional metal antimony oxidation method 2 o 3 Although the purity can reach more than 99.5%, due to the low reaction temperature, large reaction area and long reaction residence time of this method, it is difficult to control the particle size of the powder. The average particle size of the obtained products is all above 1 micron, and the particle size distribution is very wide Wide, especially not suitable for use in chemical fiber
Furthermore, in a similar plasma method to produce ultrafine Sb 2 o 3 The foreign patents of the powder, such as the U.S. patent US4347060, also have the limitations of the raw materials used, the plasma working gas is nitrogen and the particle size distribution of the product is not ideal, etc.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] The preparation method of antimony trioxide superfine powder specifically comprises the following steps:

[0019] 1) Mix 280kg of antimony oxide ore, 80kg of anthracite, and 50kg of limestone in a mixer to obtain a mixture;

[0020] 2) Smelting the mixture obtained in step 1) at 1000°C, and passing through the oxidation chamber, settling chamber, and surface cooling pipe successively into the bag filter to obtain antimony oxide powder;

[0021] 3) Using the plasma generator as the heat source, the antimony oxide powder obtained in step 2) is gasified by the gasification oxidation-condensation method under a high-temperature plasma jet at 3600°C to completely gasify the antimony oxide powder to obtain gas-phase antimony oxide ;

[0022] 4) Quench the gas-phase antimony oxide obtained by gasification in step 3) with an inert gas, so that the temperature of the gas drops rapidly, and the gas-phase antimony oxide undergoes successive processes of nucleation, crystal growth...

Embodiment 2

[0026] The preparation method of antimony trioxide superfine powder specifically comprises the following steps:

[0027] 1) Mix 350kg of antimony oxide ore, 100kg of anthracite, and 80kg of limestone in a mixer to obtain a mixture;

[0028] 2) Smelting the mixture obtained in step 1) at 1100°C, and passing through the oxidation chamber, settling chamber, and surface cooling pipe successively into the bag filter to obtain antimony oxide powder;

[0029] 3) Using the plasma generator as the heat source, the antimony oxide powder obtained in step 2) is gasified by a gasification oxidation-condensation method under a high-temperature plasma jet at 5500°C to completely gasify the antimony oxide powder to obtain gas-phase antimony oxide ;

[0030] 4) Quench the gas-phase antimony oxide obtained by gasification in step 3) with an inert gas, so that the temperature of the gas drops rapidly, and the gas-phase antimony oxide undergoes successive processes of nucleation, crystal growth,...

Embodiment 3

[0034] The preparation method of antimony trioxide superfine powder specifically comprises the following steps:

[0035] 1) Mix 400kg of sulfur-oxygen mixed antimony ore, 120kg of anthracite, and 100kg of limestone in a mixer to obtain a mixture;

[0036] 2) Smelting the mixture obtained in step 1) at 1180°C, and passing through the oxidation chamber, settling chamber, and surface cooling pipe successively into the bag filter to obtain antimony oxide powder;

[0037] 3) Using the plasma generator as the heat source, the antimony oxide powder obtained in step 2) is gasified by a gasification oxidation-condensation method under a high-temperature plasma jet at 7500°C to completely gasify the antimony oxide powder to obtain gas-phase antimony oxide ;

[0038] 4) Quench the gas-phase antimony oxide obtained by gasification in step 3) with an inert gas, so that the temperature of the gas drops rapidly, and the gas-phase antimony oxide undergoes successive processes of nucleation, ...

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PUM

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Abstract

The invention discloses a method for preparing antimonous oxide ultrafine powder, and relates to an alumina thin film. The method comprises the following steps: completely gasifying antimony oxide powder under high-temperature plasma jet at 3600-7500 DEG C by using a plasma generator as a heat source and adopting a gasified oxidation-condensation method to obtain gaseous antimony oxide to further obtain antimonous oxide ultrafine powder. The method for preparing antimonous oxide ultrafine powder has the advantages of easily available raw materials and simple processing process; and the antimonous oxide ultrafine powder has a granularity less than 0.25mm, high and stable quality and remarkable economic benefit, and opens broad prospect to large-scale industrial application of medium-low level antimony oxide ores and sulfur-oxygen mixed antimony ores.

Description

technical field [0001] The invention relates to a preparation method of antimony trioxide, in particular to a preparation method of antimony trioxide superfine powder. Background technique [0002] The most important use of antimony trioxide powder is as a flame retardant in the plastic and chemical fiber industry or with other halogen organic compounds such as tetrabromobisphenol A, pentabromoethylbenzene, hexabromocyclododecane, octabromodiphenyl ether Or decabromobiphenyl, etc. are added to plastics or chemical fibers as their flame retardant synergists. However, when a certain amount of flame retardants are added to the plastic or chemical fiber matrix, their physical properties, mainly impact strength and tensile strength, will always decrease, which affects their use. Therefore, it is necessary to find a way to increase the flame retardancy of these materials without any significant effect on their physical properties. One of the effective methods is to use finer Sb2...

Claims

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Application Information

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IPC IPC(8): C01G30/00B82Y40/00
CPCC01G30/00C01P2004/62
Inventor 张玉青张契卿张小青张燕青谢玉冰王才令赵国强
Owner 上海深化实业有限公司
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