Method of preparing nano hydroxyl zinc stannate and nano zinc stannate

A zinc hydroxystannate, nanotechnology, applied in chemical instruments and methods, zinc compounds, tin compounds, etc., can solve the problems of high price and difficult application

Inactive Publication Date: 2007-02-07
HENAN UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Sodium stannate is used as raw material, the price is relatively expensive, and it is not easy to popularize in application

Method used

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  • Method of preparing nano hydroxyl zinc stannate and nano zinc stannate
  • Method of preparing nano hydroxyl zinc stannate and nano zinc stannate
  • Method of preparing nano hydroxyl zinc stannate and nano zinc stannate

Examples

Experimental program
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Effect test

Embodiment 1

[0019] Embodiment 1, 0.9g tin tetrachloride pentahydrate and 0.4g zinc chloride are dissolved in the 0.5moL / L hydrochloric acid solution of 10mL, add distilled water and dilute to 120mL, then add the content of 20mL and be 28% hydrogen peroxide aqueous solution , under the condition of stirring, dropwise add 0.5moL / L sodium hydroxide solution, adjust the pH value to about 8, after the dropwise addition, raise the temperature to 90°C, and react with temperature control for 5 hours, and filter and wash the white precipitate until it is washed with 0.2 moL / L of AgNO 3 Solution test without Cl - After ionization, the precipitate was dispersed into 40 mL of n-butanol and azeotropically distilled. The product obtained by azeotropic distillation was dried at 105° C. for 3 hours to obtain amorphous nano-sized zinc hydroxystannate. The product was burned in a horse boiling furnace at 500°C for 5 hours to obtain amorphous nanometer zinc stannate.

Embodiment 2

[0020] Example 2. Dissolve 0.9g tin tetrachloride pentahydrate and 0.85g zinc sulfate heptahydrate in 10mL of 0.5moL / L hydrochloric acid solution, add distilled water to dilute to 120mL, and add 0.5moL / L hydrogen dropwise under stirring Sodium oxide solution, adjust the pH value to about 8. After the dropwise addition, raise the temperature to 70°C, and control the temperature for 3 hours. The obtained white precipitate is filtered and washed with distilled water until it is washed with 0.5mol / L BaCl 2 Solution test without SO 4 2- ion so far. The precipitate was dispersed in 40 mL of methanol and azeotropically distilled. The product obtained by azeotropic distillation was dried at 120° C. for 3 hours to obtain nano-hydroxyzinc stannate. The product was burned in a horse boiling furnace at 500°C for 5 hours to obtain nanometer zinc stannate.

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Abstract

The invention provides a preparation method for nanometer zinc hydroxystannate and nanometer zinc stannate. Said method uses tin compounds as raw materials to prepare zinc hydroxystannate with particle size of 2-100 nm. Nanometer zinc stannate can be obtained by sintering the zinc hydroxystannate at high temperature. Zinc hydroxystannate (xZnO*ySnO*zH2O) has a molar ratio of x : y : z at 1 : 0.8-1.4 : 1-5. They can be used alone or mixed for polymer materials, and has a good effect on flame retardancy and smoke suppression. Nanometer zinc hydroxystannate can merely be used in the material operating less than 180DEG C, while nanometer zinc stannate can be used for various polymer materials. In addition, both can be also used for gas-sensitive materials and lubricant additives.

Description

technical field [0001] The invention belongs to the technical field of preparation methods of nanometer tin-based compounds, and in particular relates to preparation methods of nanometer zinc hydroxystannate and nanometer zinc stannate. Background technique [0002] In the mid-1980s, the International Tin Research Institute began to study the flame retardant and smoke suppression properties of tin compounds. It was believed that zinc hydroxystannate and zinc stannate were ideal tin-based flame retardant and smoke suppressors. Both polymers and halogen-free polymers containing halogen flame retardants have synergistic effects. These polymers include PVC, unsaturated polyesters, alkyd plastics, chlorine-containing thermoplastics, and the like. Compared with antimony trioxide, zinc hydroxystannate and zinc stannate have the following advantages: reducing the amount of smoke, carbon dioxide and carbon monoxide generated when materials are burned, non-toxic, safe, and low dosage...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G19/00C01G9/00
Inventor 张治军张予东吴志申党鸿辛
Owner HENAN UNIVERSITY
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