Nano-class silver oxide and preparation method thereof

A silver oxide, nano-scale technology, applied in chemical instruments and methods, silver compounds, silver compounds, etc., can solve the problems of reducing particle growth rate, large product particles, long production cycle, etc., to achieve short production cycle, low cost, The effect of a high degree of automation

Active Publication Date: 2005-01-19
CHINA LUCKY FILM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In order to realize the low concentration of the reactants to participate in the reaction, the slow drop method is usually adopted. Although this reduces the concentration of one of the reactants to a certain extent, which is beneficial to reduce the growth rate of the silver oxide particles, it cannot make the two kinds of reactants at the same time. The reactants are all reacted at low concentrations, and t

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Dissolve 200 grams of silver nitrate in 960 ml of pure water to make a silver nitrate solution; dissolve 55 grams of solid sodium hydroxide in 990 ml of pure water to make a sodium hydroxide solution; add 2 grams of protective agent polyvinylpyrrolidone Add 1200 milliliters of pure water to make mother liquor, and adjust pH value=8 with sodium hydroxide, built-in stator and rotor agitator (patent number is ZL01278630.6). The silver nitrate solution and the sodium hydroxide solution enter into the stator of the agitator from the upper and lower feeding ports respectively through the feeding tube, and are diluted in the stator, and then the two reaction solutions contact and react when the stator is thrown out, and instantly generate silver oxide particles. The stirring speed is 2000 rpm, and the two liquids are double-injected at a constant speed for 60 minutes. Continue to mature for 20 minutes after the double injection, cool down, settle, and filter out silver oxide. ...

Embodiment 2

[0025] Dissolve 500 grams of silver nitrate in 900 milliliters of pure water to make a silver nitrate solution; dissolve 130 grams of solid sodium hydroxide in 970 milliliters of pure water to make a sodium hydroxide solution; add 10 grams of protective agent polyvinylpyrrolidone Add 1200 milliliters of pure water to make mother liquor, and adjust the pH value=10 with sodium hydroxide, with a built-in stator and rotor agitator (patent No. ZL01278630.6). The silver nitrate solution and the sodium hydroxide solution enter into the stator of the agitator from the upper and lower feeding ports respectively through the feeding tube, and are diluted in the stator, and then the two reaction solutions contact and react when the stator is thrown out, and instantly generate silver oxide particles. The stirring speed is 2500 rpm, and the two liquids are double-injected at a constant speed for 20 minutes. Continue to mature for 60 minutes after the double injection, cool down, settle, and...

Embodiment 3

[0027] Dissolve 350 grams of silver nitrate in 930 ml of pure water to make a silver nitrate solution; dissolve 93 grams of solid sodium hydroxide in 980 ml of pure water to make a sodium hydroxide solution; add 5 grams of protective agent polyvinyl alcohol Add 1200 milliliters of pure water to make mother liquor, and adjust pH value=9 with sodium hydroxide, built-in stator and rotor agitator (patent No. is ZL01278631.4). The silver nitrate solution and the sodium hydroxide solution respectively enter into the stator of the agitator through the feeding pipe, and are diluted in the stator, and then the two reaction liquids contact and react to generate silver oxide particles instantly. The stirring speed is 2200rpm, and the two liquids are double-injected at a constant speed for 10 minutes. Continue to mature for 40 minutes after the double injection, cool down, settle, and filter out silver oxide. The product is washed with pure water until pH = 7-8, then washed and filtered ...

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Abstract

The invention relates to a nano-class silver oxide and preparation method thereof which comprises, using dual injection control technology, stirring through a stirrer, charging silver nitrate water solution and sodium-hydroxide water solution simultaneously into reaction system containing protective agent water solution, obtaining silver oxide particles and performing cooling down, filtering, washing and drying.

Description

technical field [0001] The invention relates to nanoscale silver oxide and a preparation method thereof. Background technique [0002] Silver oxide is widely used in industries such as electronic components, button batteries, preservatives, purifiers, glass colorants, abrasives and chemical catalysts. 30% of industrial silver is used in the production of silver oxide or silver nitrate, and the consumption of silver oxide in the electronic components industry accounts for about 90% of the total output of silver oxide. At present, the domestic production of silver oxide mainly adopts the method of adding silver nitrate solution to sodium hydroxide solution dropwise. After the silver oxide is precipitated, the silver oxide product is obtained through washing, separation and drying, but the particle size of the product is generally in the micron range. size, it is difficult to meet the requirements of the application field that the smaller the silver oxide particle size, the be...

Claims

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Application Information

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IPC IPC(8): B01F5/00C01G5/00
Inventor 宋红芹张进夏玉丹穆继荣
Owner CHINA LUCKY FILM CORP
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