Magnetic black iron oxide

An iron oxide black and magnetic technology, applied in the direction of iron oxide/iron hydroxide, ferrous oxide, etc., can solve the problems of long process cycle, high reaction temperature and high energy consumption, and achieve low reaction temperature and finished product purity. The effect of high and low production energy consumption

Active Publication Date: 2013-10-09
SHENGHUA GROUP DEQING HUAYUAN PIGMENT
View PDF4 Cites 7 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003]Traditional iron black production processes include synthetic method and liquid phase method, both of which have a disadvantage, that is, the process cycle is long and the temperature required is relatively high, which

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Add 1000ml water into a 5000ml beaker as a medium for heating in a water bath, and stick a thermometer on the wall of the beaker; heat the beaker and control the water temperature at about 40 degrees Celsius; take 22.24g FeSO 4 ·7H 2 O and 20gFe 2 (SO 4 ) 3 ·XH 2 After O is dissolved in water, put it into a conical flask. Add 100ml of water and dissolve it fully; then add 0.1ml of ethanol and 0.1ml of oleic acid to the above solution; adjust the pH to 1.2 with ammonia water, and adjust the pH with 32% liquid alkali Adjust to 7.93, 10 minutes after the alkali adjustment is completed, put the Erlenmeyer flask in a 5000ml beaker, stir at the same time, start timing from the temperature rise, wait for 1 hour of reaction, press filter, rinse, dry, and crush to get the finished product . The synthetic product color index is as follows:

[0018] hue value L 37.69 A 1.62 B -0.53

Embodiment 2

[0020] Add 1000ml of water into a 5000ml beaker as a medium for heating in a water bath, and attach a thermometer to the wall of the beaker; heat the beaker and control the water temperature at about 40 degrees Celsius; take 30g of FeCl 2 4H 2 O and 27gFeCl 3 ·6H 2 O, put the two solids in a conical flask, and add 100ml of water to fully dissolve; then add 0.1ml of ethanol and oleic acid to the above solution; adjust the pH to 1.2 with ammonia water, and adjust the pH with 32% liquid caustic soda To 7.60, 10 minutes after alkali adjustment, place the conical flask in a 5000ml beaker, heat it in a water bath, stir at the same time, start timing from the temperature rise, wait for its reaction for 1 hour, perform press filtration, rinse, dry, and pulverize to obtain finished product. The synthetic product color index is as follows:

[0021] hue value L 39.19 A 1.22 B -5.62

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 relates to magnetic black iron oxide. A preparation process of the magnetic black iron oxide comprises the following steps of: (1), putting the mixture of ferric salt and ferrite into a container, adding a certain amount of water, and preparing a solution with the iron ion concentration of 1.0-2.0 mol/L; (2), adding ethanol and oleic acid into the container; (3), adjusting the pH of the solution in the container by using ammonia water till the pH is 1.0-1.4, and then, adjusting the pH by using liquid caustic soda till the pH is 7.4-8.1; (4), increasing the temperature of the container filled with a mixed solution after adjusting the pH; (5), filter-pressing, rinsing, drying and crushing at the beginning of increasing the temperature after reacting for 0.8-1.5 hours, and then obtaining the finished product. Because of adopting the technical scheme, the preparation process is lower in reaction temperature and shorter in process period; furthermore, the prepared finished product is higher in purity; the production energy consumption is reduced; the production cost is saved.

Description

technical field [0001] The invention relates to a magnetic iron oxide black. Background technique [0002] Ferric oxide, chemical formula Fe 3 o 4 . Also known as iron oxide black, magnet, magnet, it is a black crystal with magnetic properties, so it is also called magnetic iron oxide. Soluble in acid, insoluble in water, alkali, ethanol, ether and other organic solvents, but the natural ferric ferric oxide is insoluble in acid, and is easily oxidized to ferric oxide in air in a humid state. Usually used as pigments and polishes, it can also be used in the manufacture of audio tapes and telecommunications equipment. [0003] The traditional iron black production process includes synthetic method and liquid phase method. Both methods have a disadvantage, that is, the process cycle is long, the temperature required is relatively high, and the energy consumption is high. Although the iron black synthesis technique shown in the disclosed national patents CN1579948A and CN17...

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
IPC IPC(8): C01G49/08
Inventor 李金花竺增林冯阿荣沈辉廖金华
Owner SHENGHUA GROUP DEQING HUAYUAN PIGMENT
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap