Unlock instant, AI-driven research and patent intelligence for your innovation.

Method for preparing nanometer ferroferric oxide through acid-regenerating desilicated mud cake

A technology of ferric tetroxide and desiliconized mud cake, which is applied in the directions of iron oxide/iron hydroxide, nanotechnology for material and surface science, nanotechnology, etc., to achieve easy magnetization, uniform particle size dispersion, reduced Effects of Environmental Pollution

Inactive Publication Date: 2014-07-30
SHANGHAI INST OF TECH
View PDF3 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The method of preparing nano-iron ferric oxide by using acid-regenerated desiliconized mud cake achieves the purpose of comprehensive environmental pollution control and solves the problem of resource recovery and reuse

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Method for preparing nanometer ferroferric oxide through acid-regenerating desilicated mud cake
  • Method for preparing nanometer ferroferric oxide through acid-regenerating desilicated mud cake

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] A kind of method utilizing acid regeneration desiliconization mud cake to prepare nano iron ferric oxide, specifically comprises the following steps:

[0031] (1) Add 500mL of water to 200g of massive desiliconized mud cake, and make a slurry under the condition of heating at 80°C, and finally form a desiliconized slurry with good dispersibility;

[0032] (2) According to the mass volume ratio of desiliconized mud cake and regenerated acid, that is, the ratio of desiliconized mud cake: regenerated acid is 1g: 2ml, add regenerated acid to the desiliconized mud obtained in step (1), and continue After heating and stirring at 80°C for 2 hours, throw 100g of thin iron side material, heat to 80°C to achieve acid dissolution and reduction of the desiliconized mud cake, then filter, wash with water, adjust pH=4 with ammonia water, and set the volume to 1L to obtain iron turbid liquid;

[0033] (3) Take the ferrous chloride turbid solution obtained in step (2), add 600g of dod...

Embodiment 2

[0038] A kind of method utilizing acid regeneration desiliconization mud cake to prepare nano iron ferric oxide, specifically comprises the following steps:

[0039] (1) Add 400ml of water to 200g of massive desiliconized mud cake, and beat under the condition of heating at 80°C, and finally form desiliconized mud with better dispersibility;

[0040] (2) According to the mass volume ratio of desiliconized mud cake and regenerated acid, that is, the ratio of desiliconized mud cake: regenerated acid is 1g: 2ml, add regenerated acid to the desiliconized mud obtained in step (1), and continue for 80 After heating and stirring at ℃ for 2 hours, put in 200g of thin iron trim, heat to 85℃ to achieve acid dissolution and reduction of the desiliconized mud cake, then filter and wash with water, adjust the pH to 4 with ammonia water, and set the volume to 500ml to obtain chlorinated ferrous turbid liquid;

[0041] (3) Take the ferrous chloride turbid solution obtained in step (2), add ...

Embodiment 3

[0044] A kind of method utilizing acid regeneration desiliconization mud cake to prepare nano iron ferric oxide, specifically comprises the following steps:

[0045] (1) Add 400mL of water to 200g of massive desiliconized mud cake, and beat under the condition of heating at 80℃, and finally form desiliconized mud with good dispersibility;

[0046](2) According to the mass volume ratio of desiliconized mud cake and regenerated acid, that is, the ratio of desiliconized mud cake: regenerated acid is 1g: 2ml, add regenerated acid to the desiliconized mud obtained in the above (a) step, and continue After heating and stirring at 80°C for 2 hours, put in 160g of thin iron scrap, heat to 85°C to achieve acid dissolution and reduction of the desiliconized mud cake, then filter and wash with water. Adjust the pH=4 with ammonia water, and set the volume to 500ml to obtain the ferrous chloride turbid solution;

[0047] (3) Add 840 g of n-octadecylamine to the ferrous chloride turbid sol...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses a method for preparing nanometer iron ferric oxide by using acid regenerated desiliconization mud cake, that is, first adding water to the desilication mud cake and heating and beating to form a desiliconization mud with better dispersibility, and then adding the desilication mud to the obtained desilication mud Add regenerated acid, heat and stir evenly, and react for 2 hours, then add thin iron trim, heat to 80-90°C to achieve acid dissolution and reduction of desiliconized mud cake, filter, wash with water, adjust pH=4 with ammonia water, and obtain the filtrate It is ferrous chloride turbid liquid; after further adding fatty amine for oxidation reaction, centrifuge, wash and dry to obtain crude nano-ferric oxide product; finally, ultrasonically disperse the crude nano-ferric oxide product in water and separate it by magnetic attraction Afterwards, further drying in a vacuum drying oven at 60-90° C. to obtain nanometer ferric oxide. The method of the present invention uses the acid-regenerated desiliconization mud cake as a raw material to prepare nano ferric oxide, realizes the recovery and reuse of the desilication mud cake of industrial waste, and reduces environmental pollution.

Description

technical field [0001] The invention relates to a method for preparing a soft magnetic material, in particular to a method for preparing nano ferroferric oxide by using industrial waste desiliconized mud cake obtained after recycling waste acid in a cold rolling steel plant as a raw material. Background technique [0002] Nano-ferroferric oxide is an important spinel-type ferrite, and when its particle diameter is smaller than a certain critical size, it will produce superparamagnetism. This material is very easy to magnetize under the external magnetic field. When the external magnetic field is cancelled, it is very easy to demagnetize. It is a soft magnetic material that will not be permanently magnetized. Due to its special magnetic and electrical properties, it has broad application prospects in the fields of magnetic fluid, magnetic recording, and medical targets. [0003] At present, the methods used to prepare nano-Fe3O4 include co-precipitation method, pyrolysis met...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): B09B3/00C01G49/08B82Y30/00
Inventor 付斌张娜李学娇
Owner SHANGHAI INST OF TECH