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A preparation method for reducing the particle size of sodium pyroantimonate

A technology of sodium pyroantimonate and particle size, which is applied in the field of flame retardant materials, can solve the problem of excessive grain size of sodium pyroantimonate, and achieve the effects of no three wastes pollution, high yield and good comprehensive recovery

Active Publication Date: 2022-04-12
YIYANG SHENGLI CHEM IND +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to solve the technical problem that the existing sodium pyroantimonate crystal grains are too large, the invention provides a preparation method for reducing the particle size of sodium pyroantimonate, which can effectively reduce the particle size of sodium pyroantimonate

Method used

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  • A preparation method for reducing the particle size of sodium pyroantimonate
  • A preparation method for reducing the particle size of sodium pyroantimonate
  • A preparation method for reducing the particle size of sodium pyroantimonate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0058] Step (1): Pre-reaction:

[0059] Add 50kg antimony trioxide and 100L pure water into a 500L reaction kettle, stir and mix well, then add 105L (potassium hydroxide solution, concentration is 4mol / L) potassium hydroxide (potassium hydroxide is 0.5% of the mass of antimony trioxide) times), stir evenly, heat up to 70°C and react at a constant temperature for 0.5 hours;

[0060] Step (2): Oxidation reaction:

[0061] Step (1) After the reaction is completed, the temperature is raised to 90 ° C, and (30%) hydrogen peroxide (0.8 times the mass of antimony trioxide) is added while stirring, and the reaction is carried out at a constant temperature for 0.5 hours;

[0062] Step (3): precipitation reaction: (precipitation temperature 90°C)

[0063] In the reaction system of step (2), add tartaric acid 50Kg (and the mass ratio of antimony trioxide is 1: 1, and the concentration of tartaric acid in the system is 100g / L) and sodium chloride 80Kg (and the quality of antimony trioxi...

Embodiment 2

[0066] Step (1): Pre-reaction:

[0067] Add 50kg antimony trioxide and 100L pure water into a 500L reaction kettle, stir and mix well, then add 105L (potassium hydroxide solution, concentration is 4mol / L) potassium hydroxide (potassium hydroxide is 0.5% of the mass of antimony trioxide) times), stir evenly, heat up to 70°C and react at a constant temperature for 0.5 hours;

[0068] Step (2): Oxidation reaction:

[0069] Step (1) After the reaction is completed, the temperature is raised to 90°C, and 30% hydrogen peroxide (0.8 times that of antimony trioxide) is added while stirring, and the reaction is carried out at constant temperature for 0.5 hours;

[0070] Step (3): Precipitation reaction: (temperature 90°C)

[0071] In the reaction system of step (2), add tartaric acid 100Kg (and the mass ratio of antimony trioxide is 2: 1, and the concentration of tartaric acid in the system is 200g / L) and sodium chloride 80Kg (and the quality of antimony trioxide The ratio is 1.6:1,...

Embodiment 3

[0074] Step (1): Pre-reaction:

[0075] Add 50kg antimony trioxide and 100L pure water into a 500L reactor, stir and mix well, then add 105L potassium hydroxide (potassium hydroxide solution, concentration is 4mol / L) (potassium hydroxide is 0.5% of the mass of antimony trioxide times), stir evenly, heat up to 70°C and react at a constant temperature for 0.5 hours;

[0076] Step (2): Oxidation reaction:

[0077] Step (1) After the reaction is completed, the temperature is raised to 90°C, and 30% hydrogen peroxide (potassium hydroxide is 0.8 times the mass of antimony trioxide) is added while stirring, and the reaction is carried out at constant temperature for 0.5 hours;

[0078] Step (3): Precipitation reaction: (temperature 90°C)

[0079] In the reaction system of step (2), add tartaric acid 200Kg (the mass ratio of tartaric acid and antimony trioxide is 4: 1, and concentration is 400g / L) and sodium chloride 80Kg (and the mass ratio of antimony trioxide is 1.6: 1. The conc...

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Abstract

The invention discloses a method for preparing superfine sodium pyroantimonate by adding potassium hydroxide, comprising the following steps: step (1): antimony trioxide and potassium hydroxide are pre-reacted; Add oxidant to the pre-reaction system to carry out oxidation reaction; step (3): add complexing agent and sodium hydroxide to the oxidation reaction system of step (2) to carry out precipitation reaction; Sodium pyroantimonate was obtained. In the method of the present invention, antimony trioxide is used as raw material, potassium hydroxide is used for pre-reaction, and then oxidation reaction is carried out to oxidize Sb(III) into Sb(V), and finally a complexing agent and compounding agent are innovatively added to the oxidation reaction system. Sodium hydroxide, carry out precipitation reaction under the coordination action of described complexing agent, can obviously reduce the grain size of sodium pyroantimonate like this.

Description

technical field [0001] The invention relates to a preparation method of ultrafine sodium pyroantimonate, which is widely used in flame-retardant materials and belongs to the technical field of flame-retardant materials. Background technique [0002] Sodium pyroantimonate is a white powder with granular crystals and equiaxed crystals. It is resistant to high temperature and does not decompose at 1000°C. It can be used as a high-grade glass clarifier and decolorizer, a flame retardant for plastics and textiles, and for enamel and ceramics. Opalescent and opaque coatings for foundry paints. The production capacity of antimony-based processed products in my country is second only to antimony oxide. With the development of science and technology, glass is required to clarify and prevent fogging at a higher level, and plastics have better flame retardant effects. Correspondingly, higher requirements are placed on the performance of sodium antimonate. Particle size is one of the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01G30/02
CPCC01G30/02C01P2002/72C01P2004/61
Inventor 杨喜云曹升尤编政唐磊徐徽石西昌
Owner YIYANG SHENGLI CHEM IND
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