METHOD OF PRODUCTION OF SUPERPARAMAGNETIC NICKEL PARTICLES AND SUPERPARAMAGNETIC POWDER COMPOSITION Russian patent published in 2014 - IPC B22F9/20 B82Y30/00 C22B23/00 

FIELD: metallurgy.

SUBSTANCE: proposed method comprises mixing of nickel compounds and poluolyc alcohol, heating of obtained mix, cooling it and centrifugation, flushing and drying of produced precipitate. Nickel compounds and poluolyc alcohol are taken at the ratio of 1-2 mmol/mol. Additionally alkali is introduced at the ratio of 2-3 mol to nickel mol and surfactant in amount of 10-30 mmol to nickel mol. Mix is heated in stepwise manner: First, it is heated from room temperature to 120°C at the rate of 10°C/min, then, from 120 to 190°C at the rate of 3.5°C/min. Thereafter, said mix is held for at least 10 minutes and cooled with the help of frozen distilled water. Multicomponent suspension after cooling is subjected to centrifugation, flushed and dried in air.

EFFECT: higher catalytic activity and safety, non-polluting process.

8 cl, 3 dwg, 22 ex