WEAR-PROOF COMPOSITE PROPPANT AND COMPONENTS THEREOF Russian patent published in 2019 - IPC C09K8/80 

FIELD: chemistry.

SUBSTANCE: invention relates to proppant intended for underground formation hydraulic fracturing. Proppant with modified surface, including proppant and chemical coating, at least partially covering proppant, which is mainly propylene glycol, mainly containing a combination of propylene glycol and glycerine, or mainly glycerol and less than 2 wt. % modified surface modified proppant. Proppant with modified surface, including proppant and chemical coating, at least partially covering proppant, which is mainly propylene glycol, mainly containing a combination of propylene glycol and glycerine, or mainly glycerol and making less than 2 wt. % modified surface modified propane, wherein the modified surface modified proppant is characterized by a turbidity reduction coefficient of more than about 40 % and an inhaled dust reduction ratio of more than about 70 %. Proppant with modified surface, including proppant and chemical coating, at least partially covering proppant, which is mainly propylene glycol, mainly containing a combination of propylene glycol and glycerine, or representing mainly glycerin and is less than 2 wt. % of modified surface modified proppant. Proppant with modified surface, including proppant and chemical coating, at least partially covering proppant, consisting essentially of coating based on tall oil resin. Material for creating a coating on a proppant for use in hydraulic fracturing, which contains glycerin, tall oil resin, alkyl ether or a combination thereof, and is less than 2 wt. %. proppant, on which this material is applied. Method of producing said proppant wherein said propping agent is provided with said chemical coating and mixing or spraying said coating on proppant. Method of reducing abrasion of proppant throughout its chain, where said proppant is used. Invention is developed in dependent items of the formula.

EFFECT: technical result is reduction of amount of dust/fine particles formed by proppant due to abrasion and collisions during transportation and movement.

55 cl, 34 ex, 13 dwg