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Preparation method of powdery antimony pentoxide applied to optical glass

A technology of antimony pentoxide and optical glass, which is applied in the fields of chemical instruments and methods, antimony oxide/antimony hydroxide/antimony oxyacid, inorganic chemistry, etc. It can solve the problems of unstable performance of optical glass and decreased yield, etc. To achieve the effect of mild and controllable process, simple raw materials and easy access to raw materials

Active Publication Date: 2021-07-02
刘明钢 +5
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a method for preparing powdered antimony pentoxide applied to optical glass, so as to solve the problem that antimony pentoxide is introduced into optical glass by existing methods, resulting in unstable performance of optical glass and decreased yield

Method used

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  • Preparation method of powdery antimony pentoxide applied to optical glass
  • Preparation method of powdery antimony pentoxide applied to optical glass
  • Preparation method of powdery antimony pentoxide applied to optical glass

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] The present embodiment prepares powder-shaped high purity pentoxide bismuth by the following steps:

[0048] Step 1, prepare four-water-saving bold crude;

[0049] Step 1.1, adding a mass concentration of 40% -42% to the polytetrafluorosphere, heating to 70 ° C, in the stirring state, batch is added in batches, each addition is x, where x = m / 4, M is the total mass of metal antimony powder, the total mass of the metal ruthenium powder and the mass concentration of 40% of the total mass ratio 1: 2.5;

[0050] Step 1.2, in the reaction mixture of step 1.1, a hydrochloride having a mass concentration of 36% is added; after the metal is fully dissolved, the color of the reaction liquid becomes brown, add a certain amount of deionized water, adjust the reaction. Liquid specific weight to 1.20;

[0051] Step 1.3, warmed to 85 ° C, thermal insulation for 5 hours, agonized; heat filtrate, collect the filtrate, remove unreacted metal antimony powder, then the filtrate is mainly te...

Embodiment 2

[0067] The present embodiment is achieved by the following steps, and the difference between the reaction temperature, time and material ratio of each step is different from that of the first embodiment:

[0068] Step 1, prepare four-water-saving bold crude;

[0069] Step 1.1, adding a mass concentration of 40% -42% to the polytetrafluorosphere, heating to 60 ° C, in the stirring state, a metal powder is added in batches, each addition is x, where x = m / 5, M is the total mass of metal antimony powder, the total mass of metal and high quality and mass concentration of 40% is 1: 3;

[0070] Step 1.2, adding the catalytic amount of 37% hydrochloric acid to the reaction mixture of step 1.1; after the metal is fully dissolved, the color of the reaction liquid becomes brown, add a quantity of deionized water, adjust the reaction. Liquid specific gravity to 1.25;

[0071] Step 1.3, warmed to 80 ° C, thermal insulation for 3 hours, agonize; heat filtrate, collect the filtrate, remove th...

Embodiment 3

[0089] The present embodiment is achieved by the following steps, and the reaction temperature and time of each step is different from that of the first embodiment:

[0090] Step 1, prepare four-water-saving bold crude;

[0091] Step 1.1, adding the nitric acid having a mass concentration of 40% -42% to the polytetrafluorosphere, warmed to 65 ° C, in the agitation state, batch of metal antimony powder, each added to x, where x = m / 4, M is the total mass of metal antimony powder, the total mass of the metal ruthenium powder and the mass concentration of 40% of the total mass ratio 1: 2.5;

[0092] Step 1.2, in the reaction mixture of step 1.1, a hydrochloride having a mass concentration of 36% is added; after the metal is fully dissolved, the color of the reaction liquid becomes brown, add a certain amount of deionized water, adjust the reaction. Liquid specific weight to 1.20;

[0093] Step 1.3, warmed to 85 ° C, thermal insulation for 5 hours, agonized; heat filtrate, collect t...

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Abstract

The invention relates to a preparation method of antimony pentoxide, in particular to a preparation method of powdery antimony pentoxide applied to optical glass. The problems that the performance of optical glass is unstable and the yield is reduced due to the fact that antimony pentoxide is introduced into the optical glass through an existing method are solved. According to the method, antimony and nitric acid are used as raw materials, antimony powder is added in batches, the feeding quality of each time is adjusted, the molar ratio of metal antimony powder to nitric acid and the reaction temperature are optimized, meanwhile, hydrochloric acid with the catalytic amount is added in the reaction process to enable the metal antimony powder to be completely dissolved, Sb (Cl) 5 is generated, then water is added to hydrolyze the Sb (Cl) 5, aging is conducted for a long time, and antimony pentoxide tetrahydrate is obtained. Anhydrous powdery antimony pentoxide with the purity of 99.99% is finally obtained through special purifying procedures and drying conditions. And when the anhydrous powdery antimony pentoxide is added in the melting process of optical glass, generating of bubbles and devitrification are prevented in the melting process, and the optical glass with stable performance can be obtained.

Description

Technical field [0001] The present invention relates to a method of preparing a nunxide, and more particularly to a method of preparing a powder-like bismuth applied to optical glass. Background technique [0002] Pentoxide is widely used in optical glass as an exhibitizer and a clarification agent. However, due to the existing niodehydride finished products, it is generally a trioxide and a bismuth bismuth mixture or a nihydrate containing water, and cannot be directly introduced into the optical glass. Therefore, during the optical glass fusion process, it is mainly introduced into trioxide, and the nitrate is introduced while introducing, during high temperature melting, the nitrate is chemically withdrawal, and the trioxide is bismuth. Transforming into two antimony, and the effect of eliminating micro-bubbles and clarification. However, since the nitrate is introduced during the glass fusion, when the temperature is melted, since the temperature zone is different, the trioxi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G30/00C03C1/00
CPCC01G30/004C03C1/00C03C1/004C01P2006/80
Inventor 刘明钢闫宏伟李洋洋黄雪锋田厦丁杰魏文丽张晓红
Owner 刘明钢
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