METHOD FOR PRODUCING HIGHLY POROUS SORBENTS MODIFIED WITH CARBON NANOMATERIALS FOR CLEANING AQUEOUS SOLUTIONS FROM OIL AND PETROLEUM PRODUCTS Russian patent published in 2023 - IPC B01J20/06 B01J20/26 B01J20/282 B01J20/32 

FIELD: sorbents.

SUBSTANCE: invention relates to the production of highly porous carbon-containing sorbents that can be used for adsorption purification from oil, oil products and various non-polar organic substances that form films on the water surface. A method for producing highly porous sorbents modified with carbon nanomaterials is presented, which includes the following stages: preparation of a colloidal solution of graphene oxide or carbon nanotubes; surface treatment of a highly porous polymer matrix with a colloidal solution of graphene oxide or multilayer carbon nanotubes and polyvinylpyrrolidone; drying samples to constant weight; subsequent washing with ethyl alcohol and further drying to obtain a sorbent modified with carbon nanomaterial; at the same time, in the case of surface treatment of a highly porous polymer matrix with a colloidal solution of graphene oxide, graphene oxide is reduced by introducing a reducing agent into the solution, which is ascorbic acid, or glucose, or sodium ascorbate, followed by heat treatment for 6-8 hours at a temperature from 60 to 80°C required to carry out the recovery stage.

EFFECT: invention provides the development of a simple, environmentally friendly and safe method for obtaining a sorbent for efficient sorption of organic substances and minimal water sorption.

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