FIELD: chemical industry.
SUBSTANCE: invention can be used in analytical chemistry, industrial ecology and electronics. First, a cation exchange resin in salt form is placed in distilled water. Then the swollen cation exchanger is poured with a freshly prepared aqueous solution of iron (III) chloride with a concentration of 0.1–1.0 mol/m3 at a volume ratio of 1:(100–150). Hydrolysis and ion exchange reactions, during which the solution is saturated, are carried out at a temperature of 292–298 K and constant stirring for 10–30 minutes, as a result of which the chemical equilibrium of the hydrolysis reactions shifts towards the formation of reaction products. At the end of the reactions, the cation exchanger is separated from the precipitated particles, to which gelatin is added as a stabilizer. The resulting nanoparticles of amorphous iron (III) hydroxide have a hydrodynamic diameter of 10–70 nm and an electrokinetic potential from +0.025 to +0.045 V.
EFFECT: invention eliminates the use of alkalis during precipitation, as well as ensures a narrow size distribution of amorphous iron (III) hydroxide nanoparticles.
1 cl, 2 dwg, 2 ex
