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Method for preparing antimony pentoxide dry powder

A technology of antimony pentoxide and antimony trioxide, applied in chemical instruments and methods, inorganic chemistry, antimony compounds, etc., can solve the problems of easily blocking the pores of operators, reducing the utilization rate of raw materials, and loss of antimony pentoxide. , to achieve the effect of improving utilization, reducing usage, and simple equipment

Active Publication Date: 2011-01-12
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

It is generally believed in the industry that the particle size of antimony pentoxide is conducive to improving the flame retardant effect, but when it is spray-dried into a dry powder, the powder that is too fine will easily block the pores of the operator during use, causing skin redness, allergies, etc. problem, which seriously damages the health of employees. In addition, the dry powder produced by spray drying is likely to cause the loss of antimony pentoxide, which reduces the utilization rate of raw materials, and the energy consumption of spray drying is high.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] In the dry three-necked flask that stirrer, reflux condenser are housed, 90g is charged with antimony trioxide, 85g 30% hydrogen peroxide, 150g deionized water, diatomaceous earth 60g, stirred at 90 DEG C, reflux reaction 3 hours, Cool, filter, and dry to obtain a white solid with a yield of 98%.

Embodiment 2

[0019] In a dry three-neck flask equipped with a stirring device and a reflux condenser, put 90g of antimony trioxide, 72g of 30% hydrogen peroxide, and 150g of deionized water, and stir at 90°C. After reacting for 20 minutes, add 90g of talcum powder , reflux reaction for 3 hours, cooled, filtered, and dried to obtain a white solid, and the yield of the product was 98%

Embodiment 3

[0021] In a dry three-necked flask equipped with a stirring device and a reflux condenser, put 90g of antimony trioxide, 72g of 30% hydrogen peroxide, and 150g of deionized water, stir at 90°C, and obtain a milky white stable colloid after 3 hours of reflux reaction , drop into 90g white carbon black in this colloid, stir 10 minutes, leave standstill, the original milky white colloid produces precipitation rapidly, by sedimentation, filtration, drying obtains white solid, and the productive rate that obtains product is 98%.

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PUM

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Abstract

The invention relates to a method for preparing antimony pentoxide dry powder, which comprises the following steps of: mixing antimonous oxide, an oxidizing agent and water in a certain ratio for stirring, reflux and cooling, adding an inertia porous material in the reaction process, and filtering and drying a product after a reaction is finished to obtain a white antimony pentoxide solid with a core-shell structure. The method overcomes the defects of high energy consumption of atomizing drying, harmful to health of operating personnel due to superfine powder and the like in the process of producing the antimony pentoxide, so the invention provides a method for preparing the core-shell antimony pentoxide dry powder, which has the advantages of low cost and high utilization rate of rare materials.

Description

technical field [0001] The invention designs a method for preparing antimony pentoxide dry powder, and in particular relates to a method for preparing antimony pentoxide dry powder with a core-shell structure by using an inert porous material as a carrier to absorb antimony pentoxide colloid. Background technique [0002] Antimony pentoxide colloid has high dispersion and small particle size, generally in the range of 10-100nm. It has the characteristics of high transparency, good thermal stability, low smoke generation, easy to add, easy to disperse, etc. It is widely used in rubber, plastic, fiber, fabric, dye, paper and other fields. At present, the preparation of antimony pentoxide mostly uses antimony trioxide as raw material, and oxidizes in the water phase to obtain colloidal antimony pentoxide, and then adds a stabilizer to form a stable colloid, or spray-dries to make dry powder. It is generally believed in the industry that the particle size of antimony pentoxide ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G30/00
Inventor 马访中
Owner 广东宇星阻燃新材股份有限公司
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