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Method for preparing iron-containing nanoparticles

A technology of iron nanoparticles and particles, which is applied in the field of preparation of iron-containing nanoparticles, can solve the problems of small amount of one-time preparation, low reaction efficiency, and poor particle size dispersion of nanoparticles, so as to improve the reaction surface renewal rate, good dispersibility, The effect of improving mass transfer efficiency

Active Publication Date: 2020-06-09
SHANGHAI YIPIN PIGMENTS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Different reaction methods have different control conditions, but all have defects such as low reaction efficiency, poor particle size dispersion of nanoparticles, and small amount of one-time preparation.

Method used

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  • Method for preparing iron-containing nanoparticles
  • Method for preparing iron-containing nanoparticles
  • Method for preparing iron-containing nanoparticles

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Add 50kg water in 100L glass reactor, add 4.6kg ferrous sulfate (100% FeSO 4 ·7H 2 (0), 2kg liquid caustic soda (30%) and 15g polydimethylsiloxane are made into the reaction solution that pH is 12, pass into air 0.05m through titanium particle sintered aeration stone then 3 / min, react for 1 hour, filter, wash and dry the reaction solution to obtain the iron-containing nanoparticles, which are brown Fe 2 o 3 ·nH 2 960 g of O (n=0-8) nanoparticles, the particle diameter of which is 3-5 nanometers.

[0030] Titanium particle sintered aeration stone adopts TA1 titanium sintered product of Baoji Hongxinyuan Metal Material Co., Ltd.

Embodiment 2

[0032] Add 600kg water in 1000L enamel reactor, add 45kg ferrous chloride (100% FeCl 2 4H 2 (2), 36kg liquid caustic soda (30%) and 250g polymethylphenylsiloxane are mixed with the reaction solution that pH value is 3.5, pass into air 0.5m by corundum sintered aeration stone then 3 / min, after reacting for 45min, filter, wash and dry the reaction solution to obtain the iron-containing nanoparticles, which are 10.8kg of yellow FeOOH nanoparticles with a particle size of 8 to 10 nanometers. . The corundum sintered aeration stone is the brand 300 flat brown corundum aerator of Wuxi Jineng Environmental Protection Company.

Embodiment 3

[0034] at 10m 3 Add 7t of water in the glass fiber reinforced plastic reactor, add 300kg ferrous nitrate (100%Fe(NO) under stirring 3 ) 2 ), 450kg liquid caustic soda (30%) and 4000g acryl polyether modified polysiloxane are prepared into a reaction solution with a pH value of 8, and then pass air through the plastic microporous aeration head for 10m 3 / min, after reacting for 3 hours, the reaction solution is filtered, washed and dried to obtain the described iron-containing nanoparticles, which are black Fe 3 o 4 100 kg of nanoparticles, the particle diameter of which is 20-25 nanometers. The plastic microporous aeration head adopts the product of Wuxi Jineng Environmental Protection Company's brand name 215 rubber disc diaphragm microporous aerator.

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Abstract

The invention provides a method for preparing iron-containing nanometer particles. The method includes the following steps that under the stirring condition, a reaction solution with the PH of 3 to 12is prepared from water, a ferrous iron compound, caustic soda liquid and an additive, and air with the diameter of 0.2 micron to 200 microns is introduced through aeration heads for reacting, whereinthe introduction amount is 0.03 m<3> / min to 20 m<3> / min, and reaction time is 0.5 hour to 3 hours; then the iron-containing nanometer particles are collected from reaction products, wherein the particle size is 2 nanometers to 100 nanometers. According to the method, the reaction surface update rate and the space dispersity and uniformity of the air in a reaction system are greatly improved, thereaction standing time of the air in the reaction system is greatly shortened, the air-liquid-solid three-phase mass transfer efficiency of the reaction system is greatly improved accordingly, all parts in a reactor are under the uniform reaction condition, and a large quantity of iron-containing nanometer particles with the same quality and good dispersity can be obtained at a time. According tothe technology, the ferrous iron raw materials can be oxidized by air to obtain different types of iron-containing nanometer particles only by adjusting PH values of the reaction system in the reaction process.

Description

technical field [0001] The present invention relates to a method of preparing iron-containing nanoparticles. Background technique [0002] Nanomaterials have many excellent properties and are widely used in national defense, electronics, chemical industry, light industry, metallurgy and other fields. Among them, iron-containing nanoparticles have attracted much attention due to their unique properties and uses. They can be used as magnetic materials for high-density recording, and can also be used as adsorption materials for sewage treatment. At the same time, they are also used in catalysis, functional ceramics, transparent particles and pigments. Manufacturing has wide and potential applications. [0003] Different types of iron-containing nanoparticles (FeOOH, FeOOH, Fe 2 o 3 ·nH 2 O(n=0~8), Fe 3 o 4 ) There are different reaction processes, mainly co-precipitation method, solvothermal method, microemulsion method, thermal decomposition method, etc. Different react...

Claims

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Application Information

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IPC IPC(8): C01G49/06C01G49/02C01G49/08B82Y40/00
CPCB82Y40/00C01G49/02C01G49/06C01G49/08C01P2004/64
Inventor 龚磊王丹英李伟张弛
Owner SHANGHAI YIPIN PIGMENTS CO LTD
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