METHOD FOR OBTAINING DISPERSIONS OF SUBMICRON AND NANOSIZED PARTICLES OF ALKALI METALS Russian patent published in 2023 - IPC B01F23/50 C09K23/00 B82B1/00 

FIELD: oil production.

SUBSTANCE: obtaining dispersions of submicron and nanosized particles of alkali metals with a dispersed phase content of 1-60% by weight, dispersed or suspended in an inert organic liquid, specifically to dispersions of lithium, sodium, potassium used in chemical reactions, for example, as reagents, as well as in oil production and refining processes as, for example, a chemical component for enhanced oil recovery, and also as a substance involved in hydrogen formation reactions. Obtaining stable dispersions of submicron and nanosized particles of alkali metals consists in the following: at the 1st stage, a sample of an inert organic liquid is taken, having a boiling point higher than the melting point of an alkali metal by at least 20°С and resistant to alkali metal, add a sample of alkali metal in the ratio of inert organic liquid: alkali metal = from 99:1 to 40:60; at the 2nd stage, the resulting suspension is heated to a temperature higher than the melting point of the alkali metal by 20°C constant weak stirring; at stage 3, the resulting emulsion is dispersed under constant ultrasonic exposure for 1-15 minutes; at the 4th stage, the resulting dispersion is cooled to room temperature, the target product is obtained.

EFFECT: obtaining a dispersion of submicron and nanosized particles of alkali metals in inert liquids with a boiling point not lower than the melting point of the selected alkali metal by at least 20°C, with adjustable particle size in the range from 5 to 500 nm, narrow size distribution, higher purity compared to analogues, stable during storage; reduction in comparison with analogues of the labour intensity and time costs during the production process.

1 cl, 1 dwg, 4 ex