Magnetic black iron oxide

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...

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 can high consumption

Although the iron black synthesis process shown in the published national patents CN1579948A and CN1709984A is relatively novel, its reaction temperature is also high and energy consumption is also high